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.topbar{padding-top:14px}\n  .cctv-lens-v1 .version{font-size:10px;max-width:100%}\n  .cctv-lens-v1 .hero{padding:45px 0 60px}\n  .cctv-lens-v1 h1{font-size:clamp(42px,15vw,65px)}\n  .cctv-lens-v1 .lead{font-size:18px}\n  .cctv-lens-v1 .section{padding:72px 0}\n  .cctv-lens-v1 .stage-card{border-radius:26px;padding:12px}\n  .cctv-lens-v1 .stage-card img,.cctv-lens-v1 .stage-card:after{border-radius:18px;inset:12px}\n  .cctv-lens-v1 .stage-card img{position:absolute;inset:12px;width:calc(100% - 24px);height:calc(100% - 24px)}\n  .cctv-lens-v1 .stage-overlay{padding:24px 22px}\n  .cctv-lens-v1 .stage-specs,.cctv-lens-v1 .metric-grid,.cctv-lens-v1 .cards-3,.cctv-lens-v1 .cards-4,.cctv-lens-v1 .defs,.cctv-lens-v1 .questions,.cctv-lens-v1 .knowledge{grid-template-columns:1fr}\n  .cctv-lens-v1 .fov-space .label.left,.cctv-lens-v1 .fov-space .label.right{top:auto;bottom:18px}\n  .cctv-lens-v1 .fov-space .label.left{left:14px}\n  .cctv-lens-v1 .fov-space .label.right{right:14px}\n}\n@media(prefers-reduced-motion:reduce){.cctv-lens-v1 *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}\n<\/style>\n\n<div class=\"cctv-lens-v1\" id=\"cctv-lens-page\">\n  <div class=\"topbar\">\n    <div class=\"wrap topbar-inner\">\n      <div class=\"version\">CCTV Academy \u00b7 2.8mm Fixed Focal \u00b7 v1.0 STAGING<\/div>\n      <div class=\"langs\" aria-label=\"Language\">\n        <button class=\"lang\" type=\"button\" data-lang=\"nl\">NL<\/button>\n        <button class=\"lang\" type=\"button\" data-lang=\"fr\">FR<\/button>\n        <button class=\"lang\" type=\"button\" data-lang=\"en\">EN<\/button>\n        <button class=\"lang\" type=\"button\" data-lang=\"de\">DE<\/button>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <section class=\"hero\">\n    <div class=\"wrap hero-grid\">\n      <div>\n        <div class=\"eyebrow\" data-i18n=\"heroEyebrow\">CCTV Academy \u00b7 Field of View optics<\/div>\n        <h1 data-i18n-html=\"heroTitle\">2.8mm.<br><em>Klein getal. Grote kijkhoek.<\/em><\/h1>\n        <p class=\"lead\" data-i18n=\"heroLead\">Een 2.8mm fixed focal lens geeft een brede kijkhoek en is daarom zeer geschikt voor algemene camerabewaking. Bij deze Dahua IP-camera bedraagt de kijkhoek ongeveer 110\u00b0 horizontaal en 58\u00b0 verticaal.<\/p>\n        <div class=\"hero-actions\">\n          <a class=\"btn btn-primary\" href=\"#kijkhoek\" data-i18n=\"heroCta1\">Bekijk de kijkhoek \u2192<\/a>\n          <a class=\"btn btn-secondary localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/8-megapixel-ip-turret-camera-met-smart-dual-light-verlichting\/\" data-i18n=\"heroCta2\">Bekijk de volledige 8MP-camera<\/a>\n        <\/div>\n        <div class=\"checks\">\n          <span data-i18n=\"check1\">2.8mm fixed lens<\/span>\n          <span data-i18n=\"check2\">\u00b1110\u00b0 horizontaal<\/span>\n          <span data-i18n=\"check3\">\u00b158\u00b0 verticaal<\/span>\n        <\/div>\n      <\/div>\n      <div class=\"hero-stage\" aria-label=\"2.8mm fixed focal visual\">\n        <div class=\"stage-card\">\n          <img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/cctvacademy.be\/wp-content\/uploads\/2025\/08\/de-lens-buigt-het-licht-af-.jpg?w=812&#038;ssl=1\" alt=\"Licht dat door een CCTV-lens op de sensor wordt geprojecteerd\" fetchpriority=\"high\">\n          <div class=\"stage-overlay\">\n            <div class=\"techlabel\">CCTV ACADEMY \/\/ FIELD OF VIEW OPTICS ACTIVE<\/div>\n            <div class=\"arc-panel\" aria-hidden=\"true\">\n              <div class=\"camera-disc\"><span>2.8MM<\/span><\/div>\n            <\/div>\n            <div class=\"stage-specs\">\n              <div class=\"spec\"><small data-i18n=\"spec1k\">Horizontaal<\/small><strong>\u00b1110\u00b0<\/strong><span data-i18n=\"spec1v\">Brede kijkhoek<\/span><\/div>\n              <div class=\"spec\"><small data-i18n=\"spec2k\">Verticaal<\/small><strong>\u00b158\u00b0<\/strong><span data-i18n=\"spec2v\">Grote sc\u00e8ne<\/span><\/div>\n              <div class=\"spec\"><small data-i18n=\"spec3k\">Lens<\/small><strong>Fixed<\/strong><span data-i18n=\"spec3v\">Niet aanpasbaar<\/span><\/div>\n            <\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <div class=\"jump-wrap\">\n    <div class=\"wrap\">\n      <nav class=\"jump\" aria-label=\"Page navigation\">\n        <a href=\"#fixed\" data-i18n=\"nav1\">Fixed lens<\/a>\n        <a href=\"#kijkhoek\" data-i18n=\"nav2\">Kijkhoek<\/a>\n        <a href=\"#begrijpen\" data-i18n=\"nav3\">Wat betekent 2.8mm?<\/a>\n        <a href=\"#vergelijken\" data-i18n=\"nav4\">Lens vergelijken<\/a>\n        <a href=\"#detail\" data-i18n=\"nav5\">Afstand &amp; detail<\/a>\n        <a href=\"#begrippen\" data-i18n=\"nav6\">Focal \/ FOV \/ Depth<\/a>\n        <a href=\"#praktijk\" data-i18n=\"nav7\">Praktijk<\/a>\n        <a href=\"#verder\" data-i18n=\"nav8\">Verder leren<\/a>\n      <\/nav>\n    <\/div>\n  <\/div>\n\n  <section class=\"section section-light\" id=\"fixed\">\n    <div class=\"wrap\">\n      <div class=\"section-kicker\" data-i18n=\"s1Kicker\">Lens 2.8mm \u00b7 Fixed focal<\/div>\n      <h2 data-i18n=\"s1Title\">De kijkhoek wordt door de lens bepaald.<\/h2>\n      <div class=\"split\">\n        <div class=\"copy\">\n          <p data-i18n=\"s1p1\">Een fixed focal lens heeft een vaste brandpuntsafstand. Bij deze camera is dat 2.8 millimeter.<\/p>\n          <p data-i18n=\"s1p2\">Omdat de lens niet zoomt, ligt de basis-kijkhoek vast. Je verandert dus niet achteraf via software van 2.8mm naar bijvoorbeeld 6mm.<\/p>\n          <p data-i18n=\"s1p3\">Dat maakt een fixed lens eenvoudig, betrouwbaar en zeer geschikt voor installaties waar vooraf duidelijk is welk gebied moet worden bewaakt.<\/p>\n          <p data-i18n=\"s1p4\">De plaats waar je de camera monteert wordt daardoor extra belangrijk.<\/p>\n        <\/div>\n        <div class=\"metric-grid\" style=\"margin-top:0\">\n          <article class=\"metric\"><div class=\"metric-big\">2.8<\/div><h3 data-i18n=\"m1h\">Focal length<\/h3><p data-i18n=\"m1p\">Brandpuntsafstand in millimeter. Bepaalt mee hoe breed de camera kijkt.<\/p><\/article>\n          <article class=\"metric\"><div class=\"metric-big\">110\u00b0<\/div><h3 data-i18n=\"m2h\">Horizontale kijkhoek<\/h3><p data-i18n=\"m2p\">Breed overzicht voor algemene camerabewaking, ingangen en open zones.<\/p><\/article>\n          <article class=\"metric\"><div class=\"metric-big\">FIX<\/div><h3 data-i18n=\"m3h\">Niet verstelbaar<\/h3><p data-i18n=\"m3p\">Na montage blijft de brandpuntsafstand gelijk. De plaatsing moet dus meteen kloppen.<\/p><\/article>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"section section-dark\" id=\"kijkhoek\">\n    <div class=\"wrap\">\n      <div class=\"section-kicker\" data-i18n=\"s2Kicker\">Field of View<\/div>\n      <h2 data-i18n=\"s2Title\">Een brede lens ziet veel van de sc\u00e8ne.<\/h2>\n      <p class=\"section-intro\" data-i18n=\"s2Intro\">Met ongeveer 110\u00b0 horizontale kijkhoek kan deze 2.8mm-lens een relatief groot gebied in \u00e9\u00e9n beeld vastleggen. Dat is interessant voor ingangen, winkels, magazijnen, garages, kantoren, terrassen of andere algemene overzichtssituaties.<\/p>\n      <div class=\"split\">\n        <div class=\"diagram\" aria-hidden=\"true\">\n          <div class=\"diagram-inner\">\n            <div class=\"fov-space\">\n              <div class=\"gridline\"><\/div>\n              <div class=\"label top\">FIELD OF VIEW<strong>110\u00b0<\/strong><\/div>\n              <div class=\"label left\">VERTICAL<strong>\u00b158\u00b0<\/strong><\/div>\n              <div class=\"label right\">LENS<strong>2.8 MM<\/strong><\/div>\n              <div class=\"cone\"><\/div>\n              <div class=\"cam\"><\/div>\n            <\/div>\n          <\/div>\n        <\/div>\n        <div class=\"copy\">\n          <p data-i18n=\"s2p1\">Een brede kijkhoek heeft echter ook een keerzijde: hoe groter het gebied dat je in hetzelfde beeld stopt, hoe minder pixels er beschikbaar zijn voor een klein object op grotere afstand.<\/p>\n          <p data-i18n=\"s2p2\">Een 2.8mm-lens is dus ideaal voor overzicht, maar niet automatisch de beste keuze wanneer je op afstand veel identificerend detail nodig hebt.<\/p>\n          <div class=\"info-box\">\n            <h3 data-i18n=\"s2BoxH\">Praktisch inzicht<\/h3>\n            <p data-i18n=\"s2BoxP\">Kies een kijkhoek niet omdat \u201c2.8mm standaard is\u201d, maar omdat ze past bij het werkelijke beveiligingsdoel.<\/p>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"section section-dark\" id=\"begrijpen\" style=\"padding-top:8px\">\n    <div class=\"wrap\">\n      <div class=\"section-kicker\" data-i18n=\"s3Kicker\">2.8mm begrijpen<\/div>\n      <h2 data-i18n=\"s3Title\">Brandpuntsafstand bepaalt mee hoe breed je kijkt.<\/h2>\n      <div class=\"cards-3\">\n        <article><div class=\"card-mark\" data-i18n=\"card1k\">Wide<\/div><h3 data-i18n=\"card1h\">Kortere brandpuntsafstand<\/h3><p data-i18n=\"card1p\">Een relatief korte brandpuntsafstand, zoals 2.8mm, levert doorgaans een bredere kijkhoek. Daardoor zie je meer van de omgeving in \u00e9\u00e9n camerabeeld.<\/p><\/article>\n        <article><div class=\"card-mark\">2.8 MM<\/div><h3 data-i18n=\"card2h\">Breed overzicht<\/h3><p data-i18n=\"card2p\">2.8mm wordt veel gebruikt voor algemene bewaking waarbij overzicht belangrijker is dan sterk optisch inzoomen. Plaatsing en doel blijven essentieel.<\/p><\/article>\n        <article><div class=\"card-mark\" data-i18n=\"card3k\">Tele<\/div><h3 data-i18n=\"card3h\">Langere brandpuntsafstand<\/h3><p data-i18n=\"card3p\">Naarmate de brandpuntsafstand groter wordt, wordt de kijkhoek meestal smaller. Een kleiner deel van de sc\u00e8ne vult dan een groter deel van het beeld.<\/p><\/article>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"section section-light\" id=\"vergelijken\">\n    <div class=\"wrap\">\n      <div class=\"section-kicker\" data-i18n=\"s4Kicker\">Fixed, Varifocal of Motorized?<\/div>\n      <h2 data-i18n=\"s4Title\">Niet iedere camera gebruikt hetzelfde lenstype.<\/h2>\n      <p class=\"section-intro\" data-i18n=\"s4Intro\">De juiste lens hangt af van de locatie, gewenste kijkhoek en de flexibiliteit die je na montage nodig hebt.<\/p>\n      <div class=\"table-wrap\">\n        <table>\n          <thead>\n            <tr>\n              <th data-i18n=\"t1\">Lens type<\/th>\n              <th data-i18n=\"t2\">Brandpuntsafstand<\/th>\n              <th data-i18n=\"t3\">Kijkhoek<\/th>\n              <th data-i18n=\"t4\">Aanpasbaar?<\/th>\n              <th data-i18n=\"t5\">Typisch gebruik<\/th>\n            <\/tr>\n          <\/thead>\n          <tbody>\n            <tr>\n              <td><strong>Fixed Lens<\/strong><\/td>\n              <td data-i18n=\"r1c2\">Vast, bv. 2.8mm<\/td>\n              <td data-i18n=\"r1c3\">Vast<\/td>\n              <td data-i18n=\"r1c4\">Nee<\/td>\n              <td data-i18n=\"r1c5\">Algemene bewaking<\/td>\n            <\/tr>\n            <tr>\n              <td><strong>Varifocal Lens<\/strong><\/td>\n              <td data-i18n=\"r2c2\">Verstelbaar, bv. 2.8\u201312mm<\/td>\n              <td data-i18n=\"r2c3\">Verstelbaar<\/td>\n              <td data-i18n=\"r2c4\">Handmatig<\/td>\n              <td data-i18n=\"r2c5\">Flexibele sc\u00e8ne-afstelling<\/td>\n            <\/tr>\n            <tr>\n              <td><strong>Motorized Zoom<\/strong><\/td>\n              <td data-i18n=\"r3c2\">Gemotoriseerd<\/td>\n              <td data-i18n=\"r3c3\">Op afstand verstelbaar<\/td>\n              <td data-i18n=\"r3c4\">Op afstand<\/td>\n              <td data-i18n=\"r3c5\">Zoom \/ specifieke toepassing<\/td>\n            <\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"section section-light\" id=\"detail\" style=\"padding-top:12px\">\n    <div class=\"wrap\">\n      <div class=\"section-kicker\" data-i18n=\"s5Kicker\">Afstand versus detail<\/div>\n      <h2 data-i18n=\"s5Title\">Hoe breder het beeld, hoe slimmer je moet plaatsen.<\/h2>\n      <div class=\"tradeoff\">\n        <div class=\"trade-visual\" aria-hidden=\"true\">\n          <div class=\"bands\">\n            <div class=\"stack\">\n              <div class=\"block\"><strong data-i18n=\"trade1v\">MEER DETAIL<\/strong><span data-i18n=\"trade1p\">Een kleiner deel van de sc\u00e8ne krijgt relatief meer pixels.<\/span><\/div>\n              <div class=\"block\"><strong data-i18n=\"trade2v\">OVERZICHT<\/strong><span data-i18n=\"trade2p\">Een breder beeld legt meer omgeving vast.<\/span><\/div>\n            <\/div>\n            <div class=\"zone\">\n              <div class=\"zone-label\" data-i18n=\"trade3p\">Groter gebied \/ minder pixels per object<\/div>\n            <\/div>\n          <\/div>\n        <\/div>\n        <div class=\"copy\">\n          <p data-i18n=\"s5p1\">Een 2.8mm lens kan een grote sc\u00e8ne in \u00e9\u00e9n beeld vastleggen.<\/p>\n          <p data-i18n=\"s5p2\">Maar wanneer een persoon, voertuig of detail verder van de camera verwijderd is, beslaat dat object een kleiner deel van het totale beeld.<\/p>\n          <p data-i18n=\"s5p3\">Dat betekent dat beschikbare pixels per object minstens zo belangrijk zijn als de totale megapixelresolutie.<\/p>\n          <div class=\"info-box\">\n            <h3 data-i18n=\"s5BoxH\">Praktische regel<\/h3>\n            <p data-i18n=\"s5BoxP\">Kies een lens niet omdat \u201c2.8mm standaard is\u201d, maar omdat de kijkhoek past bij het beveiligingsdoel.<\/p>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"section section-dark\" id=\"begrippen\">\n    <div class=\"wrap\">\n      <div class=\"section-kicker\" data-i18n=\"s6Kicker\">Drie begrippen<\/div>\n      <h2 data-i18n=\"s6Title\">Focal Length. Field of View. Depth of Field.<\/h2>\n      <p class=\"section-intro\" data-i18n=\"s6Intro\">Deze termen worden vaak samen gebruikt, maar betekenen niet hetzelfde.<\/p>\n      <div class=\"defs\">\n        <article><div class=\"letter\">F<\/div><h3>Focal Length<\/h3><p data-i18n=\"def1\">De brandpuntsafstand van de lens, uitgedrukt in millimeter. Hier: 2.8mm.<\/p><\/article>\n        <article><div class=\"letter\">V<\/div><h3>Field of View<\/h3><p data-i18n=\"def2\">De kijkhoek of het gebied dat de camera daadwerkelijk in beeld krijgt. Bij deze camera ongeveer 110\u00b0 horizontaal.<\/p><\/article>\n        <article><div class=\"letter\">D<\/div><h3>Depth of Field<\/h3><p data-i18n=\"def3\">Het gebied v\u00f3\u00f3r en achter het ingestelde scherptepunt dat voldoende scherp wordt weergegeven. Dit is iets anders dan de totale kijkhoek.<\/p><\/article>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"section section-dark\" id=\"praktijk\" style=\"padding-top:10px\">\n    <div class=\"wrap\">\n      <div class=\"section-kicker\" data-i18n=\"s7Kicker\">Lenskeuze in de praktijk<\/div>\n      <h2 data-i18n=\"s7Title\">Een goede lens begint met een goede camerapositie.<\/h2>\n      <p class=\"section-intro\" data-i18n=\"s7Intro\">Kijkhoek, montagehoogte, afstand en beveiligingsdoel moeten v\u00f3\u00f3r de installatie samen bekeken worden.<\/p>\n      <div class=\"hardware\">\n        <a class=\"hardware-img localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/8-megapixel-ip-turret-camera-met-smart-dual-light-verlichting\/\">\n          <img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/cctvacademy.be\/wp-content\/uploads\/2025\/08\/wat-is-een-cmos-beeld-sensor-CCTV-Micro-Learning-in-Kortrijk-copy.jpg?w=812&#038;ssl=1\" alt=\"Dahua 8 megapixel turret camera met 2.8mm-lens\" loading=\"lazy\">\n          <div class=\"hardware-caption\"><small data-i18n=\"s7CaptionK\">Bestaand CCTV Academy beeld<\/small><strong data-i18n=\"s7Caption\">De vaste kijkhoek van de 2.8mm Dahua-camera.<\/strong><\/div>\n        <\/a>\n        <div class=\"questions\">\n          <div class=\"question\"><small>01<\/small><strong data-i18n=\"q1h\">Hoe breed moet ik kijken?<\/strong><span data-i18n=\"q1p\">Bepaal eerst welke zone werkelijk in beeld moet komen.<\/span><\/div>\n          <div class=\"question\"><small>02<\/small><strong data-i18n=\"q2h\">Welk detail heb ik nodig?<\/strong><span data-i18n=\"q2p\">Overzicht, herkennen en identificeren vragen niet dezelfde beeldvulling.<\/span><\/div>\n          <div class=\"question\"><small>03<\/small><strong data-i18n=\"q3h\">Hoe ver staat het object?<\/strong><span data-i18n=\"q3p\">Op grotere afstand vult hetzelfde object minder pixels in het totaalbeeld.<\/span><\/div>\n          <div class=\"question\"><small>04<\/small><strong data-i18n=\"q4h\">Kan ik na montage nog aanpassen?<\/strong><span data-i18n=\"q4p\">Bij een fixed lens pas je de brandpuntsafstand niet achteraf aan.<\/span><\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"section section-light\" id=\"verder\">\n    <div class=\"wrap\">\n      <div class=\"section-kicker\" data-i18n=\"s8Kicker\">Bouw verder op deze kennis<\/div>\n      <h2 data-i18n=\"s8Title\">Lens, sensor en verlichting horen samen.<\/h2>\n      <p class=\"section-intro\" data-i18n=\"s8Intro\">Gebruik deze pagina als onderdeel van jouw technische CCTV-leerpad.<\/p>\n      <div class=\"knowledge\">\n        <a class=\"localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/8-megapixel-ip-turret-camera-met-smart-dual-light-verlichting\/\"><div class=\"card-tag\">Camera<\/div><h3 data-i18n=\"k1h\">8MP Smart Dual Light camera<\/h3><p data-i18n=\"k1p\">Bekijk de volledige camera waar deze 2.8mm lens in wordt gebruikt.<\/p><div class=\"card-link\" data-i18n=\"k1c\">Bekijk camera \u2192<\/div><\/a>\n        <a class=\"localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/beeldsensor-8mp-dahua-ip-camera\/\"><div class=\"card-tag\">Sensor<\/div><h3 data-i18n=\"k2h\">8MP beeldsensor<\/h3><p data-i18n=\"k2p\">De lens projecteert het beeld rechtstreeks op de sensor.<\/p><div class=\"card-link\" data-i18n=\"k2c\">Bekijk beeldsensor \u2192<\/div><\/a>\n        <a class=\"localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/wat-is-een-cmos-sensor\/\"><div class=\"card-tag\">CMOS<\/div><h3 data-i18n=\"k3h\">Wat is een CMOS-sensor?<\/h3><p data-i18n=\"k3p\">Begrijp hoe licht wordt omgezet naar digitaal beeld.<\/p><div class=\"card-link\" data-i18n=\"k3c\">Begrijp CMOS \u2192<\/div><\/a>\n        <a class=\"localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/slimme-ai-verlichting-dual-licht-ir-licht-warm-wit-licht\/\"><div class=\"card-tag\">Nachtzicht<\/div><h3>Smart Dual Light<\/h3><p data-i18n=\"k4p\">Ontdek hoe IR en warm wit licht de sc\u00e8ne be\u00efnvloeden.<\/p><div class=\"card-link\" data-i18n=\"k4c\">Bekijk Dual Light \u2192<\/div><\/a>\n        <a class=\"localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/ai-chip-in-de-8-megapixel-ip-camera-van-dahua\/\"><div class=\"card-tag\">AI<\/div><h3 data-i18n=\"k5h\">AI-chip in de camera<\/h3><p data-i18n=\"k5p\">Nadat het beeld door lens en sensor is gemaakt, kan AI het analyseren.<\/p><div class=\"card-link\" data-i18n=\"k5c\">Bekijk AI-chip \u2192<\/div><\/a>\n        <a class=\"localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/dahua-codering-smart-h-264-h-265\/\"><div class=\"card-tag\">Video<\/div><h3>Smart H.265+<\/h3><p data-i18n=\"k6p\">Begrijp wat er met de videodata gebeurt nadat het beeld is opgebouwd.<\/p><div class=\"card-link\" data-i18n=\"k6c\">Bekijk compressie \u2192<\/div><\/a>\n        <a class=\"localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/8-megapixel-ip-turret-camera-met-smart-dual-light-verlichting\/\"><div class=\"card-tag\">Installatie<\/div><h3>IP67 buitenmontage<\/h3><p data-i18n=\"k7p\">Een goede kijkhoek is waardeloos als de camera verkeerd wordt gemonteerd.<\/p><div class=\"card-link\" data-i18n=\"k7c\">Bekijk IP67 \u2192<\/div><\/a>\n        <a class=\"localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/installateur-camerabewaking-opleidingen-in-kortrijk\/\"><div class=\"card-tag\">Hands-on<\/div><h3>CCTV Micro-Learning<\/h3><p data-i18n=\"k8p\">Test verschillende camera's en kijkhoeken zelf in de praktijk.<\/p><div class=\"card-link\" data-i18n=\"k8c\">Ontdek Micro-Learning \u2192<\/div><\/a>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <div class=\"ticker\" aria-hidden=\"true\">\n    <div class=\"ticker-track\">\n      <span>2.8 MM FIXED FOCAL<\/span><span>110\u00b0 HORIZONTAL FIELD OF VIEW<\/span><span>58\u00b0 VERTICAL<\/span><span>FIELD OF VIEW<\/span><span>LENS \u2192 SENSOR \u2192 PROCESSOR<\/span><span>GENERAL SURVEILLANCE<\/span><span>2.8 MM FIXED FOCAL<\/span><span>110\u00b0 HORIZONTAL FIELD OF VIEW<\/span><span>58\u00b0 VERTICAL<\/span><span>FIELD OF VIEW<\/span><span>LENS \u2192 SENSOR \u2192 PROCESSOR<\/span><span>GENERAL SURVEILLANCE<\/span>\n    <\/div>\n  <\/div>\n\n  <section class=\"cta\">\n    <div class=\"wrap\">\n      <div class=\"cta-card\">\n        <div class=\"section-kicker\" style=\"color:var(--accent2)\" data-i18n=\"ctaKicker\">CCTV Micro-Learning<\/div>\n        <h2 data-i18n=\"ctaTitle\">Een kijkhoek begrijp je pas echt wanneer je zelf een camera verplaatst.<\/h2>\n        <p data-i18n=\"ctaText\">Test 2.8mm-camera's, verander montagehoogte en afstand, vergelijk beeldvulling en ontdek hoe lens, sensor en resolutie elkaar in een echte installatie be\u00efnvloeden.<\/p>\n        <div class=\"cta-actions\">\n          <a class=\"btn btn-primary localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/installateur-camerabewaking-opleidingen-in-kortrijk\/\" data-i18n=\"cta1\">Ontdek CCTV Micro-Learning \u2192<\/a>\n          <a class=\"btn btn-secondary localized-link\" href=\"https:\/\/cctvacademy.be\/nl\/opleiding-installatie-en-onderhoud-camerabewakingssystemen\/\" data-i18n=\"cta2\">Bekijk de CCTV-opleidingen<\/a>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n<\/div>\n\n<script>\n(function(){\n  var root=document.getElementById('cctv-lens-page');\n  if(!root){return;}\n  var copy={\n    nl:{\n      heroEyebrow:'CCTV Academy \u00b7 Field of View optics',heroTitle:'2.8mm.<br><em>Klein getal. Grote kijkhoek.<\/em>',heroLead:'Een 2.8mm fixed focal lens geeft een brede kijkhoek en is daarom zeer geschikt voor algemene camerabewaking. Bij deze Dahua IP-camera bedraagt de kijkhoek ongeveer 110\u00b0 horizontaal en 58\u00b0 verticaal.',heroCta1:'Bekijk de kijkhoek \u2192',heroCta2:'Bekijk de volledige 8MP-camera',check1:'2.8mm fixed lens',check2:'\u00b1110\u00b0 horizontaal',check3:'\u00b158\u00b0 verticaal',spec1k:'Horizontaal',spec1v:'Brede kijkhoek',spec2k:'Verticaal',spec2v:'Grote sc\u00e8ne',spec3k:'Lens',spec3v:'Niet aanpasbaar',\n      nav1:'Fixed lens',nav2:'Kijkhoek',nav3:'Wat betekent 2.8mm?',nav4:'Lens vergelijken',nav5:'Afstand & detail',nav6:'Focal \/ FOV \/ Depth',nav7:'Praktijk',nav8:'Verder leren',\n      s1Kicker:'Lens 2.8mm \u00b7 Fixed focal',s1Title:'De kijkhoek wordt door de lens bepaald.',s1p1:'Een fixed focal lens heeft een vaste brandpuntsafstand. Bij deze camera is dat 2.8 millimeter.',s1p2:'Omdat de lens niet zoomt, ligt de basis-kijkhoek vast. Je verandert dus niet achteraf via software van 2.8mm naar bijvoorbeeld 6mm.',s1p3:'Dat maakt een fixed lens eenvoudig, betrouwbaar en zeer geschikt voor installaties waar vooraf duidelijk is welk gebied moet worden bewaakt.',s1p4:'De plaats waar je de camera monteert wordt daardoor extra belangrijk.',m1h:'Focal length',m1p:'Brandpuntsafstand in millimeter. Bepaalt mee hoe breed de camera kijkt.',m2h:'Horizontale kijkhoek',m2p:'Breed overzicht voor algemene camerabewaking, ingangen en open zones.',m3h:'Niet verstelbaar',m3p:'Na montage blijft de brandpuntsafstand gelijk. De plaatsing moet dus meteen kloppen.',\n      s2Kicker:'Field of View',s2Title:'Een brede lens ziet veel van de sc\u00e8ne.',s2Intro:'Met ongeveer 110\u00b0 horizontale kijkhoek kan deze 2.8mm-lens een relatief groot gebied in \u00e9\u00e9n beeld vastleggen. Dat is interessant voor ingangen, winkels, magazijnen, garages, kantoren, terrassen of andere algemene overzichtssituaties.',s2p1:'Een brede kijkhoek heeft echter ook een keerzijde: hoe groter het gebied dat je in hetzelfde beeld stopt, hoe minder pixels er beschikbaar zijn voor een klein object op grotere afstand.',s2p2:'Een 2.8mm-lens is dus ideaal voor overzicht, maar niet automatisch de beste keuze wanneer je op afstand veel identificerend detail nodig hebt.',s2BoxH:'Praktisch inzicht',s2BoxP:'Kies een kijkhoek niet omdat \u201c2.8mm standaard is\u201d, maar omdat ze past bij het werkelijke beveiligingsdoel.',\n      s3Kicker:'2.8mm begrijpen',s3Title:'Brandpuntsafstand bepaalt mee hoe breed je kijkt.',card1k:'Wide',card1h:'Kortere brandpuntsafstand',card1p:'Een relatief korte brandpuntsafstand, zoals 2.8mm, levert doorgaans een bredere kijkhoek. 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Dit is iets anders dan de totale kijkhoek.',\n      s7Kicker:'Lenskeuze in de praktijk',s7Title:'Een goede lens begint met een goede camerapositie.',s7Intro:'Kijkhoek, montagehoogte, afstand en beveiligingsdoel moeten v\u00f3\u00f3r de installatie samen bekeken worden.',s7CaptionK:'Bestaand CCTV Academy beeld',s7Caption:'De vaste kijkhoek van de 2.8mm Dahua-camera.',q1h:'Hoe breed moet ik kijken?',q1p:'Bepaal eerst welke zone werkelijk in beeld moet komen.',q2h:'Welk detail heb ik nodig?',q2p:'Overzicht, herkennen en identificeren vragen niet dezelfde beeldvulling.',q3h:'Hoe ver staat het object?',q3p:'Op grotere afstand vult hetzelfde object minder pixels in het totaalbeeld.',q4h:'Kan ik na montage nog aanpassen?',q4p:'Bij een fixed lens pas je de brandpuntsafstand niet achteraf aan.',\n      s8Kicker:'Bouw verder op deze kennis',s8Title:'Lens, sensor en verlichting horen samen.',s8Intro:'Gebruik deze pagina als onderdeel van jouw technische CCTV-leerpad.',k1h:'8MP Smart Dual Light camera',k1p:'Bekijk de volledige camera waar deze 2.8mm lens in wordt gebruikt.',k1c:'Bekijk camera \u2192',k2h:'8MP beeldsensor',k2p:'De lens projecteert het beeld rechtstreeks op de sensor.',k2c:'Bekijk beeldsensor \u2192',k3h:'Wat is een CMOS-sensor?',k3p:'Begrijp hoe licht wordt omgezet naar digitaal beeld.',k3c:'Begrijp CMOS \u2192',k4p:'Ontdek hoe IR en warm wit licht de sc\u00e8ne be\u00efnvloeden.',k4c:'Bekijk Dual Light \u2192',k5h:'AI-chip in de camera',k5p:'Nadat het beeld door lens en sensor is gemaakt, kan AI het analyseren.',k5c:'Bekijk AI-chip \u2192',k6p:'Begrijp wat er met de videodata gebeurt nadat het beeld is opgebouwd.',k6c:'Bekijk compressie \u2192',k7p:'Een goede kijkhoek is waardeloos als de camera verkeerd wordt gemonteerd.',k7c:'Bekijk IP67 \u2192',k8p:'Test verschillende camera\\'s en kijkhoeken zelf in de praktijk.',k8c:'Ontdek Micro-Learning \u2192',ctaKicker:'CCTV Micro-Learning',ctaTitle:'Een kijkhoek begrijp je pas echt wanneer je zelf een camera verplaatst.',ctaText:'Test 2.8mm-camera\\'s, verander montagehoogte en afstand, vergelijk beeldvulling en ontdek hoe lens, sensor en resolutie elkaar in een echte installatie be\u00efnvloeden.',cta1:'Ontdek CCTV Micro-Learning \u2192',cta2:'Bekijk de CCTV-opleidingen'\n    },\n    fr:{\n      heroEyebrow:'CCTV Academy \u00b7 Optique du champ de vision',heroTitle:'2,8 mm.<br><em>Petit chiffre. Grand angle.<\/em>',heroLead:'Un objectif fixe 2,8 mm offre un large angle de vue et convient donc tr\u00e8s bien \u00e0 la vid\u00e9osurveillance g\u00e9n\u00e9rale. 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Vous ne pouvez donc pas passer ensuite de 2,8 mm \u00e0 6 mm via logiciel.',s1p3:'Cela rend l\\'objectif fixe simple, fiable et tr\u00e8s adapt\u00e9 aux installations o\u00f9 la zone \u00e0 surveiller est connue \u00e0 l\\'avance.',s1p4:'L\\'emplacement de montage de la cam\u00e9ra devient donc encore plus important.',m1h:'Distance focale',m1p:'Distance focale en millim\u00e8tres. Elle contribue \u00e0 d\u00e9terminer la largeur de l\\'image.',m2h:'Angle horizontal',m2p:'Vue large pour la surveillance g\u00e9n\u00e9rale, les entr\u00e9es et les zones ouvertes.',m3h:'Non r\u00e9glable',m3p:'Apr\u00e8s le montage, la focale reste identique. Le placement doit donc \u00eatre correct d\u00e8s le d\u00e9part.',\n      s2Kicker:'Field of View',s2Title:'Un objectif large voit beaucoup de la sc\u00e8ne.',s2Intro:'Avec environ 110\u00b0 de champ horizontal, cet objectif 2,8 mm peut couvrir une zone relativement importante dans une seule image. C\\'est utile pour les entr\u00e9es, magasins, entrep\u00f4ts, garages, bureaux, terrasses et autres situations de vue d\\'ensemble.',s2p1:'Un grand angle a toutefois un revers : plus la zone couverte est grande, moins il reste de pixels disponibles pour un petit objet \u00e9loign\u00e9.',s2p2:'Un objectif 2,8 mm est donc id\u00e9al pour la vue d\\'ensemble, mais pas automatiquement le meilleur choix si vous avez besoin de beaucoup de d\u00e9tails d\\'identification \u00e0 distance.',s2BoxH:'Point pratique',s2BoxP:'Ne choisissez pas un angle parce que \u00ab 2,8 mm est standard \u00bb, mais parce qu\\'il correspond au v\u00e9ritable objectif de s\u00e9curit\u00e9.',\n      s3Kicker:'Comprendre 2,8 mm',s3Title:'La distance focale influence la largeur du champ.',card1k:'Wide',card1h:'Distance focale plus courte',card1p:'Une distance focale relativement courte, comme 2,8 mm, donne g\u00e9n\u00e9ralement un angle de vue plus large. Vous voyez donc davantage l\\'environnement dans une seule image.',card2h:'Vue large',card2p:'Le 2,8 mm est souvent utilis\u00e9 pour la surveillance g\u00e9n\u00e9rale lorsque la vue d\\'ensemble est plus importante qu\\'un fort zoom optique. Le placement et l\\'objectif restent essentiels.',card3k:'Tele',card3h:'Distance focale plus longue',card3p:'Plus la distance focale augmente, plus l\\'angle de vue devient g\u00e9n\u00e9ralement \u00e9troit. Une plus petite partie de la sc\u00e8ne occupe alors une plus grande partie de l\\'image.',\n      s4Kicker:'Fixe, varifocale ou motoris\u00e9e ?',s4Title:'Toutes les cam\u00e9ras n\\'utilisent pas le m\u00eame type d\\'objectif.',s4Intro:'Le bon objectif d\u00e9pend du lieu, de l\\'angle souhait\u00e9 et de la flexibilit\u00e9 n\u00e9cessaire apr\u00e8s l\\'installation.',t1:'Type d\\'objectif',t2:'Distance focale',t3:'Angle de vue',t4:'R\u00e9glable ?',t5:'Usage typique',r1c2:'Fixe, ex. 2,8 mm',r1c3:'Fixe',r1c4:'Non',r1c5:'Surveillance g\u00e9n\u00e9rale',r2c2:'R\u00e9glable, ex. 2,8\u201312 mm',r2c3:'R\u00e9glable',r2c4:'Manuellement',r2c5:'R\u00e9glage flexible de la sc\u00e8ne',r3c2:'Motoris\u00e9',r3c3:'R\u00e9glable \u00e0 distance',r3c4:'\u00c0 distance',r3c5:'Zoom \/ application sp\u00e9cifique',\n      s5Kicker:'Distance versus d\u00e9tail',s5Title:'Plus l\\'image est large, plus le placement doit \u00eatre r\u00e9fl\u00e9chi.',trade1v:'PLUS DE D\u00c9TAIL',trade1p:'Une plus petite partie de la sc\u00e8ne re\u00e7oit relativement plus de pixels.',trade2v:'VUE D\\'ENSEMBLE',trade2p:'Une image plus large capture davantage d\\'environnement.',trade3p:'Zone plus grande \/ moins de pixels par objet',s5p1:'Un objectif 2,8 mm peut capturer une grande sc\u00e8ne dans une seule image.',s5p2:'Mais lorsqu\\'une personne, un v\u00e9hicule ou un d\u00e9tail est plus \u00e9loign\u00e9 de la cam\u00e9ra, cet objet occupe une plus petite partie de l\\'image totale.',s5p3:'Cela signifie que le nombre de pixels disponibles par objet est au moins aussi important que la r\u00e9solution m\u00e9gapixel totale.',s5BoxH:'R\u00e8gle pratique',s5BoxP:'Ne choisissez pas un objectif parce que \u00ab 2,8 mm est standard \u00bb, mais parce que son angle de vue correspond \u00e0 l\\'objectif de s\u00e9curit\u00e9.',\n      s6Kicker:'Trois notions',s6Title:'Focal Length. Field of View. Depth of Field.',s6Intro:'Ces termes sont souvent utilis\u00e9s ensemble, mais ils ne signifient pas la m\u00eame chose.',def1:'La distance focale de l\\'objectif, exprim\u00e9e en millim\u00e8tres. Ici : 2,8 mm.',def2:'L\\'angle de vue ou la zone r\u00e9ellement couverte par la cam\u00e9ra. Ici, environ 110\u00b0 \u00e0 l\\'horizontale.',def3:'La zone devant et derri\u00e8re le point de mise au point qui reste suffisamment nette. Ce n\\'est pas la m\u00eame chose que l\\'angle de vue total.',\n      s7Kicker:'Choix de l\\'objectif en pratique',s7Title:'Un bon objectif commence par une bonne position de cam\u00e9ra.',s7Intro:'Angle de vue, hauteur de montage, distance et objectif de s\u00e9curit\u00e9 doivent \u00eatre \u00e9valu\u00e9s ensemble avant l\\'installation.',s7CaptionK:'Image CCTV Academy existante',s7Caption:'L\\'angle fixe de la cam\u00e9ra Dahua 2,8 mm.',q1h:'Quelle largeur dois-je couvrir ?',q1p:'D\u00e9terminez d\\'abord quelle zone doit r\u00e9ellement \u00eatre visible.',q2h:'Quel niveau de d\u00e9tail me faut-il ?',q2p:'Vue d\\'ensemble, reconnaissance et identification n\\'exigent pas le m\u00eame remplissage d\\'image.',q3h:'\u00c0 quelle distance se trouve l\\'objet ?',q3p:'\u00c0 plus grande distance, le m\u00eame objet occupe moins de pixels dans l\\'image totale.',q4h:'Puis-je encore ajuster apr\u00e8s le montage ?',q4p:'Avec un objectif fixe, vous ne modifiez pas la distance focale apr\u00e8s l\\'installation.',\n      s8Kicker:'Approfondir',s8Title:'Objectif, capteur et \u00e9clairage vont ensemble.',s8Intro:'Utilisez cette page comme une partie de votre parcours technique CCTV.',k1h:'Cam\u00e9ra 8 MP Smart Dual Light',k1p:'Voyez la cam\u00e9ra compl\u00e8te dans laquelle cet objectif 2,8 mm est utilis\u00e9.',k1c:'Voir la cam\u00e9ra \u2192',k2h:'Capteur 8 MP',k2p:'L\\'objectif projette directement l\\'image sur le capteur.',k2c:'Voir le capteur \u2192',k3h:'Qu\\'est-ce qu\\'un capteur CMOS ?',k3p:'Comprenez comment la lumi\u00e8re est transform\u00e9e en image num\u00e9rique.',k3c:'Comprendre le CMOS \u2192',k4p:'D\u00e9couvrez comment l\\'IR et la lumi\u00e8re blanche chaude influencent la sc\u00e8ne.',k4c:'Voir Dual Light \u2192',k5h:'Puce IA dans la cam\u00e9ra',k5p:'Une fois l\\'image cr\u00e9\u00e9e par l\\'objectif et le capteur, l\\'IA peut l\\'analyser.',k5c:'Voir la puce IA \u2192',k6p:'Comprenez ce qu\\'il advient des donn\u00e9es vid\u00e9o apr\u00e8s la formation de l\\'image.',k6c:'Voir la compression \u2192',k7p:'Un bon angle de vue ne sert \u00e0 rien si la cam\u00e9ra est mal mont\u00e9e.',k7c:'Voir IP67 \u2192',k8p:'Testez en pratique diff\u00e9rentes cam\u00e9ras et diff\u00e9rents angles de vue.',k8c:'D\u00e9couvrir le Micro-Learning \u2192',ctaKicker:'CCTV Micro-Learning',ctaTitle:'On comprend vraiment un angle de vue lorsqu\\'on d\u00e9place soi-m\u00eame une cam\u00e9ra.',ctaText:'Testez des cam\u00e9ras 2,8 mm, modifiez la hauteur de montage et la distance, comparez le remplissage d\\'image et d\u00e9couvrez comment objectif, capteur et r\u00e9solution interagissent dans une installation r\u00e9elle.',cta1:'D\u00e9couvrir le CCTV Micro-Learning \u2192',cta2:'Voir les formations CCTV'\n    },\n    en:{\n      heroEyebrow:'CCTV Academy \u00b7 Field of View optics',heroTitle:'2.8mm.<br><em>Small number. Wide view.<\/em>',heroLead:'A 2.8mm fixed focal lens gives a wide field of view and is therefore very suitable for general camera surveillance. On this Dahua IP camera, the angle is about 110\u00b0 horizontally and 58\u00b0 vertically.',heroCta1:'View the field of view \u2192',heroCta2:'View the full 8MP camera',check1:'2.8mm fixed lens',check2:'\u00b1110\u00b0 horizontal',check3:'\u00b158\u00b0 vertical',spec1k:'Horizontal',spec1v:'Wide field',spec2k:'Vertical',spec2v:'Large scene',spec3k:'Lens',spec3v:'Not adjustable',\n      nav1:'Fixed lens',nav2:'Field of view',nav3:'What does 2.8mm mean?',nav4:'Compare lenses',nav5:'Distance & detail',nav6:'Focal \/ FOV \/ Depth',nav7:'Practice',nav8:'Continue learning',\n      s1Kicker:'Lens 2.8mm \u00b7 Fixed focal',s1Title:'The viewing angle is determined by the lens.',s1p1:'A fixed focal lens has a fixed focal length. On this camera, that is 2.8 millimetres.',s1p2:'Because the lens does not zoom, the basic viewing angle stays fixed. You cannot later change 2.8mm to 6mm through software.',s1p3:'That makes a fixed lens simple, reliable and very suitable for installations where it is clear in advance which area must be monitored.',s1p4:'That also makes camera placement even more important.',m1h:'Focal length',m1p:'Focal length in millimetres. It helps determine how wide the camera sees.',m2h:'Horizontal field',m2p:'Wide overview for general surveillance, entrances and open areas.',m3h:'Not adjustable',m3p:'After installation, the focal length stays the same. Placement must therefore be right from the start.',\n      s2Kicker:'Field of View',s2Title:'A wide lens sees a lot of the scene.',s2Intro:'With about 110\u00b0 horizontal field of view, this 2.8mm lens can capture a relatively large area in a single image. That is useful for entrances, shops, warehouses, garages, offices, terraces and other general overview situations.',s2p1:'A wide viewing angle also has a trade-off: the larger the area you include in the same image, the fewer pixels remain for a small object at a greater distance.',s2p2:'So a 2.8mm lens is ideal for overview, but not automatically the best choice when you need strong identifying detail at distance.',s2BoxH:'Practical insight',s2BoxP:'Do not choose a field of view because \u201c2.8mm is standard\u201d, but because it fits the real security goal.',\n      s3Kicker:'Understanding 2.8mm',s3Title:'Focal length helps determine how wide you look.',card1k:'Wide',card1h:'Shorter focal length',card1p:'A relatively short focal length, such as 2.8mm, generally creates a wider field of view. That lets you see more of the surroundings in one camera image.',card2h:'Wide overview',card2p:'2.8mm is widely used for general surveillance where overview matters more than strong optical zoom. Placement and purpose remain essential.',card3k:'Tele',card3h:'Longer focal length',card3p:'As focal length increases, the field of view usually becomes narrower. A smaller part of the scene then fills a larger part of the image.',\n      s4Kicker:'Fixed, Varifocal or Motorized?',s4Title:'Not every camera uses the same lens type.',s4Intro:'The right lens depends on the location, desired field of view and how much flexibility you need after installation.',t1:'Lens type',t2:'Focal length',t3:'Field of view',t4:'Adjustable?',t5:'Typical use',r1c2:'Fixed, e.g. 2.8mm',r1c3:'Fixed',r1c4:'No',r1c5:'General surveillance',r2c2:'Adjustable, e.g. 2.8\u201312mm',r2c3:'Adjustable',r2c4:'Manual',r2c5:'Flexible scene adjustment',r3c2:'Motorized',r3c3:'Remote adjustable',r3c4:'Remote',r3c5:'Zoom \/ specific use',\n      s5Kicker:'Distance versus detail',s5Title:'The wider the image, the smarter the placement must be.',trade1v:'MORE DETAIL',trade1p:'A smaller part of the scene receives relatively more pixels.',trade2v:'OVERVIEW',trade2p:'A wider image captures more of the environment.',trade3p:'Larger area \/ fewer pixels per object',s5p1:'A 2.8mm lens can capture a large scene in one image.',s5p2:'But when a person, vehicle or detail is farther away from the camera, that object occupies a smaller part of the total image.',s5p3:'That means the available pixels per object are at least as important as the total megapixel resolution.',s5BoxH:'Practical rule',s5BoxP:'Do not choose a lens because \u201c2.8mm is standard\u201d, but because the field of view fits the security objective.',\n      s6Kicker:'Three concepts',s6Title:'Focal Length. Field of View. Depth of Field.',s6Intro:'These terms are often used together, but they do not mean the same thing.',def1:'The focal length of the lens, expressed in millimetres. Here: 2.8mm.',def2:'The viewing angle or area the camera actually captures. On this camera: about 110\u00b0 horizontally.',def3:'The area in front of and behind the focus point that is rendered acceptably sharp. This is different from the total field of view.',\n      s7Kicker:'Lens choice in practice',s7Title:'A good lens starts with a good camera position.',s7Intro:'Field of view, mounting height, distance and security goal must be considered together before installation.',s7CaptionK:'Existing CCTV Academy visual',s7Caption:'The fixed viewing angle of the 2.8mm Dahua camera.',q1h:'How wide do I need to look?',q1p:'First determine which zone really has to be in view.',q2h:'What detail do I need?',q2p:'Overview, recognition and identification do not require the same image fill.',q3h:'How far away is the object?',q3p:'At greater distance, the same object fills fewer pixels in the total image.',q4h:'Can I still adjust after installation?',q4p:'With a fixed lens, you cannot change the focal length afterwards.',\n      s8Kicker:'Build further on this knowledge',s8Title:'Lens, sensor and lighting belong together.',s8Intro:'Use this page as part of your technical CCTV learning path.',k1h:'8MP Smart Dual Light camera',k1p:'View the full camera in which this 2.8mm lens is used.',k1c:'View camera \u2192',k2h:'8MP image sensor',k2p:'The lens projects the image directly onto the sensor.',k2c:'View image sensor \u2192',k3h:'What is a CMOS sensor?',k3p:'Understand how light is converted into digital image data.',k3c:'Understand CMOS \u2192',k4p:'Discover how IR and warm white light influence the scene.',k4c:'View Dual Light \u2192',k5h:'AI chip in the camera',k5p:'After the image is created by the lens and sensor, AI can analyse it.',k5c:'View AI chip \u2192',k6p:'Understand what happens to the video data after the image is built.',k6c:'View compression \u2192',k7p:'A good viewing angle is worthless if the camera is mounted badly.',k7c:'View IP67 \u2192',k8p:'Test different cameras and viewing angles yourself in practice.',k8c:'Discover Micro-Learning \u2192',ctaKicker:'CCTV Micro-Learning',ctaTitle:'You only really understand a field of view when you move a camera yourself.',ctaText:'Test 2.8mm cameras, change mounting height and distance, compare image coverage and discover how lens, sensor and resolution interact in a real installation.',cta1:'Discover CCTV Micro-Learning \u2192',cta2:'View the CCTV training'\n    },\n    de:{\n      heroEyebrow:'CCTV Academy \u00b7 Optik des Sichtfelds',heroTitle:'2,8 mm.<br><em>Kleine Zahl. Gro\u00dfer Blickwinkel.<\/em>',heroLead:'Ein 2,8-mm-Objektiv mit fester Brennweite bietet einen breiten Blickwinkel und eignet sich daher sehr gut f\u00fcr die allgemeine Video\u00fcberwachung. Bei dieser Dahua-IP-Kamera betr\u00e4gt der Winkel etwa 110\u00b0 horizontal und 58\u00b0 vertikal.',heroCta1:'Sichtfeld ansehen \u2192',heroCta2:'Die vollst\u00e4ndige 8-MP-Kamera ansehen',check1:'2,8-mm-Festobjektiv',check2:'\u00b1110\u00b0 horizontal',check3:'\u00b158\u00b0 vertikal',spec1k:'Horizontal',spec1v:'Breiter Blickwinkel',spec2k:'Vertikal',spec2v:'Gro\u00dfe Szene',spec3k:'Objektiv',spec3v:'Nicht verstellbar',\n      nav1:'Festobjektiv',nav2:'Blickwinkel',nav3:'Was bedeutet 2,8 mm?',nav4:'Objektive vergleichen',nav5:'Distanz & Detail',nav6:'Focal \/ FOV \/ Depth',nav7:'Praxis',nav8:'Weiterlernen',\n      s1Kicker:'Objektiv 2,8 mm \u00b7 Feste Brennweite',s1Title:'Der Blickwinkel wird durch das Objektiv bestimmt.',s1p1:'Ein Objektiv mit fester Brennweite hat eine feste Brennweite. Bei dieser Kamera sind das 2,8 Millimeter.',s1p2:'Da das Objektiv nicht zoomt, bleibt der grundlegende Blickwinkel fest. Man kann also nicht nachtr\u00e4glich per Software von 2,8 mm auf 6 mm wechseln.',s1p3:'Das macht ein Festobjektiv einfach, zuverl\u00e4ssig und sehr geeignet f\u00fcr Installationen, bei denen von vornherein klar ist, welcher Bereich \u00fcberwacht werden muss.',s1p4:'Dadurch wird die Position der Kamera besonders wichtig.',m1h:'Brennweite',m1p:'Brennweite in Millimetern. Sie bestimmt mit, wie breit die Kamera sieht.',m2h:'Horizontaler Blickwinkel',m2p:'Breite \u00dcbersicht f\u00fcr allgemeine \u00dcberwachung, Eing\u00e4nge und offene Bereiche.',m3h:'Nicht verstellbar',m3p:'Nach der Montage bleibt die Brennweite gleich. Die Platzierung muss also sofort passen.',\n      s2Kicker:'Field of View',s2Title:'Ein Weitwinkelobjektiv sieht viel von der Szene.',s2Intro:'Mit etwa 110\u00b0 horizontalem Blickwinkel kann dieses 2,8-mm-Objektiv einen relativ gro\u00dfen Bereich in einem Bild erfassen. Das ist interessant f\u00fcr Eing\u00e4nge, Gesch\u00e4fte, Lagerhallen, Garagen, B\u00fcros, Terrassen und andere allgemeine \u00dcbersichtssituationen.',s2p1:'Ein weiter Blickwinkel hat jedoch auch eine Kehrseite: Je gr\u00f6\u00dfer der Bereich ist, der im selben Bild dargestellt wird, desto weniger Pixel stehen f\u00fcr ein kleines Objekt in gr\u00f6\u00dferer Entfernung zur Verf\u00fcgung.',s2p2:'Ein 2,8-mm-Objektiv ist also ideal f\u00fcr \u00dcberblick, aber nicht automatisch die beste Wahl, wenn man auf Distanz viele identifizierende Details ben\u00f6tigt.',s2BoxH:'Praktische Erkenntnis',s2BoxP:'W\u00e4hle einen Blickwinkel nicht, weil \u201e2,8 mm Standard sind\u201c, sondern weil er zum tats\u00e4chlichen Sicherheitsziel passt.',\n      s3Kicker:'2,8 mm verstehen',s3Title:'Die Brennweite bestimmt mit, wie breit du blickst.',card1k:'Wide',card1h:'K\u00fcrzere Brennweite',card1p:'Eine relativ kurze Brennweite wie 2,8 mm liefert in der Regel einen breiteren Blickwinkel. Dadurch sieht man mehr von der Umgebung in einem Kamerabild.',card2h:'Breite \u00dcbersicht',card2p:'2,8 mm werden h\u00e4ufig f\u00fcr allgemeine \u00dcberwachung verwendet, wenn \u00dcbersicht wichtiger ist als starker optischer Zoom. Platzierung und Zweck bleiben entscheidend.',card3k:'Tele',card3h:'L\u00e4ngere Brennweite',card3p:'Je gr\u00f6\u00dfer die Brennweite, desto schmaler wird der Blickwinkel meistens. Ein kleinerer Teil der Szene f\u00fcllt dann einen gr\u00f6\u00dferen Teil des Bildes.',\n      s4Kicker:'Fixed, Varifocal oder Motorized?',s4Title:'Nicht jede Kamera verwendet denselben Objektivtyp.',s4Intro:'Das richtige Objektiv h\u00e4ngt vom Ort, dem gew\u00fcnschten Blickwinkel und der Flexibilit\u00e4t ab, die nach der Montage ben\u00f6tigt wird.',t1:'Objektivtyp',t2:'Brennweite',t3:'Blickwinkel',t4:'Anpassbar?',t5:'Typischer Einsatz',r1c2:'Fest, z. B. 2,8 mm',r1c3:'Fest',r1c4:'Nein',r1c5:'Allgemeine \u00dcberwachung',r2c2:'Verstellbar, z. B. 2,8\u201312 mm',r2c3:'Verstellbar',r2c4:'Manuell',r2c5:'Flexible Szenenanpassung',r3c2:'Motorisiert',r3c3:'Aus der Ferne verstellbar',r3c4:'Fern',r3c5:'Zoom \/ spezielle Anwendung',\n      s5Kicker:'Entfernung versus Detail',s5Title:'Je breiter das Bild, desto intelligenter muss die Platzierung sein.',trade1v:'MEHR DETAIL',trade1p:'Ein kleinerer Teil der Szene erh\u00e4lt relativ mehr Pixel.',trade2v:'\u00dcBERSICHT',trade2p:'Ein breiteres Bild erfasst mehr Umgebung.',trade3p:'Gr\u00f6\u00dferer Bereich \/ weniger Pixel pro Objekt',s5p1:'Ein 2,8-mm-Objektiv kann eine gro\u00dfe Szene in einem Bild erfassen.',s5p2:'Wenn sich jedoch eine Person, ein Fahrzeug oder ein Detail weiter von der Kamera entfernt befindet, nimmt dieses Objekt einen kleineren Teil des Gesamtbildes ein.',s5p3:'Das bedeutet, dass die verf\u00fcgbaren Pixel pro Objekt mindestens ebenso wichtig sind wie die gesamte Megapixelaufl\u00f6sung.',s5BoxH:'Praktische Regel',s5BoxP:'W\u00e4hle ein Objektiv nicht, weil \u201e2,8 mm Standard sind\u201c, sondern weil der Blickwinkel zum Sicherheitsziel passt.',\n      s6Kicker:'Drei Begriffe',s6Title:'Focal Length. Field of View. Depth of Field.',s6Intro:'Diese Begriffe werden oft zusammen verwendet, bedeuten aber nicht dasselbe.',def1:'Die Brennweite des Objektivs, angegeben in Millimetern. Hier: 2,8 mm.',def2:'Der Blickwinkel oder Bereich, den die Kamera tats\u00e4chlich erfasst. Bei dieser Kamera etwa 110\u00b0 horizontal.',def3:'Der Bereich vor und hinter dem Fokuspunkt, der ausreichend scharf dargestellt wird. Das ist etwas anderes als der gesamte Blickwinkel.',\n      s7Kicker:'Objektivwahl in der Praxis',s7Title:'Ein gutes Objektiv beginnt mit einer guten Kameraposition.',s7Intro:'Blickwinkel, Montageh\u00f6he, Entfernung und Sicherheitsziel m\u00fcssen vor der Installation gemeinsam betrachtet werden.',s7CaptionK:'Vorhandenes CCTV-Academy-Bild',s7Caption:'Der feste Blickwinkel der 2,8-mm-Dahua-Kamera.',q1h:'Wie breit muss ich sehen?',q1p:'Bestimme zuerst, welcher Bereich wirklich im Bild sein muss.',q2h:'Welches Detail brauche ich?',q2p:'\u00dcbersicht, Erkennen und Identifizieren verlangen nicht dieselbe Bildf\u00fcllung.',q3h:'Wie weit entfernt ist das Objekt?',q3p:'In gr\u00f6\u00dferer Entfernung f\u00fcllt dasselbe Objekt weniger Pixel im Gesamtbild.',q4h:'Kann ich nach der Montage noch anpassen?',q4p:'Bei einem Festobjektiv l\u00e4sst sich die Brennweite nachtr\u00e4glich nicht mehr anpassen.',\n      s8Kicker:'Auf diesem Wissen aufbauen',s8Title:'Objektiv, Sensor und Beleuchtung geh\u00f6ren zusammen.',s8Intro:'Nutze diese Seite als Teil deines technischen CCTV-Lernpfads.',k1h:'8-MP-Smart-Dual-Light-Kamera',k1p:'Sieh dir die vollst\u00e4ndige Kamera an, in der dieses 2,8-mm-Objektiv verwendet wird.',k1c:'Kamera ansehen \u2192',k2h:'8-MP-Bildsensor',k2p:'Das Objektiv projiziert das Bild direkt auf den Sensor.',k2c:'Bildsensor ansehen \u2192',k3h:'Was ist ein CMOS-Sensor?',k3p:'Verstehe, wie Licht in ein digitales Bild umgewandelt wird.',k3c:'CMOS verstehen \u2192',k4p:'Entdecke, wie IR und warmwei\u00dfes Licht die Szene beeinflussen.',k4c:'Dual Light ansehen \u2192',k5h:'KI-Chip in der Kamera',k5p:'Nachdem das Bild durch Objektiv und Sensor erzeugt wurde, kann KI es analysieren.',k5c:'KI-Chip ansehen \u2192',k6p:'Verstehe, was mit den Videodaten geschieht, nachdem das Bild aufgebaut wurde.',k6c:'Kompression ansehen \u2192',k7p:'Ein guter Blickwinkel ist wertlos, wenn die Kamera falsch montiert ist.',k7c:'IP67 ansehen \u2192',k8p:'Teste verschiedene Kameras und Blickwinkel selbst in der Praxis.',k8c:'Micro-Learning entdecken \u2192',ctaKicker:'CCTV Micro-Learning',ctaTitle:'Einen Blickwinkel versteht man erst wirklich, wenn man die Kamera selbst bewegt.',ctaText:'Teste 2,8-mm-Kameras, \u00e4ndere Montageh\u00f6he und Entfernung, vergleiche Bildabdeckung und entdecke, wie Objektiv, Sensor und Aufl\u00f6sung in einer echten Installation zusammenspielen.',cta1:'CCTV Micro-Learning entdecken \u2192',cta2:'Die CCTV-Schulungen ansehen'\n    }\n  };\n\n  function detectedLang(){\n    var p=new URLSearchParams(window.location.search).get('lang');\n    if(copy[p]) return p;\n    var m=window.location.pathname.match(\/^\\\/(nl|fr|en|de)(?:\\\/|$)\/i);\n    return m&&copy[m[1].toLowerCase()]?m[1].toLowerCase():'nl';\n  }\n  var current=detectedLang();\n\n  function localizeLinks(){\n    root.querySelectorAll('a.localized-link').forEach(function(a){\n      var original=a.getAttribute('data-original-href')||a.getAttribute('href');\n      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