Iilensi zeVarifocal luhlobo lweelensi ezisetyenziswa kakhulu kwiikhamera zeTV ezivaliweyo (CCTV). Ngokungafaniyo neelensi ze-focal length ezizinzileyo, ezinobude be-focal obumiselweyo obungenakulungiswa, iilensi ze-varifocal zibonelela ngobude be-focal obuhlengahlengiswayo ngaphakathi koluhlu oluthile.
Inzuzo ephambili yeelensi ze-varifocal kukuguquguquka kwazo ngokubhekiselele ekulungiseni intsimi yokujonga ikhamera (i-FOV) kunye nenqanaba lokusondeza. Ngokutshintsha ubude be-focal, ilensi ikuvumela ukuba utshintshe i-engile yokujonga kwaye usondeze okanye ukhuphe njengoko kufuneka.
Olu phawu luluncedo ngakumbi kwiinkqubo zokujonga apho ikhamera inokufuna ukujonga iindawo okanye izinto ezahlukeneyo kumgama owahlukeneyo.
Iilensi zeVarifocalzidla ngokuchazwa kusetyenziswa amanani amabini, afana ne-2.8-12mm okanye i-5-50mm. Inani lokuqala limele ubude obufutshane be-focal lens, libonelela ngebala elibanzi lokujonga, ngelixa inani lesibini limele ubude obude be-focal, okuvumela ibala elimxinwa lokujonga nge-zoom engaphezulu.
Ngokulungisa ubude befocal ngaphakathi kolu luhlu, ungenza ngokwezifiso indlela ikhamera ejonga ngayo ukuze ihambelane neemfuno ezithile zokujonga.
Ubude be-focal lens
Kubalulekile ukuqaphela ukuba ukulungisa ubude be-focal kwilensi ye-varifocal kufuna ukungenelela ngesandla, nokuba kukuguqula indandatho kwilensi okanye ngokusebenzisa indlela ye-motor elawulwa kude. Oku kuvumela uhlengahlengiso olukwindawo ukuze luhambelane neemfuno zokujonga ezitshintshayo.
Umahluko ophambili phakathi kweelensi ze-varifocal kunye neelensi ezizinzileyo kwiikhamera ze-CCTV kukwazi kwazo ukulungisa ubude be-focal kunye nebala lokujonga.
Ubude beFocal:
Iilensi ezizinzileyo zinobude obuthile obungaguqukiyo. Oku kuthetha ukuba xa sele zifakiwe, intsimi yokujonga ikhamera kunye nenqanaba le-zoom zihlala zihleli. Kwelinye icala, iilensi ze-varifocal zibonelela ngobubanzi bobude be-focal obuguquguqukayo, okuvumela ukuguquguquka ekutshintsheni intsimi yokujonga ikhamera kunye nenqanaba le-zoom njengoko kufuneka.
Intsimi yoMbono:
Ngelensi ezinzileyo, intsimi yokujonga imiselwe kwangaphambili kwaye ayinakutshintshwa ngaphandle kokutshintsha ilensi ngokwasemzimbeni.Iilensi zeVarifocalKwelinye icala, inika ithuba lokulungisa ilensi ngesandla ukuze ifumane umbono obanzi okanye omxinwa, kuxhomekeke kwiimfuno zokujonga.
Inqanaba lokusondeza:
Iilensi ezizinzileyo azinalo uphawu lokusondeza, njengoko ubude bazo obugxileyo buhlala bungaguquki. Nangona kunjalo, iilensi ze-Varifocal zivumela ukusondeza okanye ukukhupha ngokulungelelanisa ubude obugxileyo ngaphakathi koluhlu oluchaziweyo. Olu phawu luluncedo xa kufuneka ugxile kwiinkcukacha ezithile okanye izinto ezikumgama owahlukileyo.
Ukukhetha phakathi kweelensi ze-varifocal kunye ne-fixed lens kuxhomekeke kwiimfuno ezithile zokujonga zesicelo. Iilensi ezizinzileyo zifanelekile xa indawo yokujonga eqhubekayo kunye nenqanaba le-zoom zanele, kwaye akukho mfuneko yokulungisa umbono wekhamera.
Iilensi zeVarifocalZiyasebenziseka lula kwaye ziluncedo xa kufuneka kube lula ukujonga izinto ngendlela engaqhelekanga kunye nokusondeza, nto leyo evumela ukuba zilungelelaniswe neemeko ezahlukeneyo zokujonga.
Ixesha lokuthumela: Agasti-09-2023
