Iilensi ze-varifocal zelensi luhlobo lweelensi ezisetyenziswayo ezisetyenziswa kwikhamera yeTekhi yeSekethi yeSekethe (CCTV). Ngokungafaniyo ngokungafaniyo neelensi ezimbini ze-lenses, ezinendawo ekugxilwe kuyo ebingakwazi ukuhlengahlengiswa, iilensi ze-varifocal zibonelela ngobude obujolise kuluhlu oluchaziweyo.
Ithuba eliyintloko leelensi ze-varifocal kukutshintsha kwabo ngokubhekisele kwicandelo lekhamera lemibono (FOV) kunye nenqanaba lokusondeza. Ngokutshintsha ubude obujolise kuzo, iilensi zikuvumela ukuba uqonde i-angle yembono kunye nokusondeza okanye ngaphandle njengoko kufuneka.
Eli nqaku liluncedo ngokukhethekileyo kwizicelo zokuhlolwa kweliso apho ikhamera inokufuna ukubeka esweni iindawo ezahlukeneyo okanye izinto kumgama ohlukeneyo.
Iilensi ze-darifocalzihlala zichazwa kusetyenziswa amanani amabini, anje nge-2.8-12mm okanye i-5-50mm. Inombolo yokuqala imele ubude obufutshane be-lens, ukubonelela ngecandelo lemibono ebanzi, ngelixa inani lesibini limele ubude obuninzi bokugxila kwi-FARTEALT, inika intsimi encinci yokujonga okungakumbi.
Ngokuhlengahlengiswa kobude obugxile kolu luhlu, unokulungisa umbono wekhamera ukuze uhambelane neemfuno ezithile zokuhlola.
Ubude obujolise kwii-lens ze-varifocal
Kufanelekile ukuba uqaphele ukuba uhlengahlengiso kubude obugxile kwilensi ye-varifocal ifuna ungenelelo lwe-mail, nokuba iguqule iringi kwilensi okanye ngokusebenzisa indlela yemoto elawulwa ngokude. Oku kuvumela uhlengahlengiso lwendawo ukuze ilungele ukutshintsha kweemfuno zokuhlola.
Umahluko ophambili phakathi kweelensi ze-darifocal kunye nezimiselo kwikhamera ye-CCTV kulele kubude obujolise kubude obugxile kwibala.
Ubude obujolise kuyo:
Iilensi ezimisiweyo zinobude obuthile, obungalungelelaniyo. Oku kuthetha ukuba sele ifakiwe, intsimi yekhamera yembono kunye nenqanaba lokusondeza lihlala lihleli. Kwelinye icala, iilensi ze-varifocal zibonelela ngoluhlu lwezinto ezisetyenziswayo, zivumela ukuba ziguquguqukele ekutshintsheni indawo yekhamera yembono kunye nenqanaba lokusondeza njengoko kufuneka.
Intsimi yembono:
Ngeelensi eziqingqiweyo, intsimi yembono ichazwe kwangaphambili kwaye ayinakutshintsha ngaphandle kwelensi.Iilensi ze-darifocalKwelinye icala, ukubonelela ngokuguquguqukayo ukuze kulungiswe ngesandla ilensi ukuze ifezekise indawo ebanzi okanye imbiza encinci yokujonga, kuxhomekeka kwiimfuno zokuhlola.
Inqanaba lokusondeza:
Iilensi ezimisiweyo azinalo inqaku lokusondeza, njengoko ubude bendawo yabo buhlala buhleli. Iilensi ze-darifocal, nangona kunjalo, zivumele ukusondeza ngaphakathi okanye ukuphuma ngokuhlengahlengiswa kobude obujolise ngaphakathi kuluhlu oluchaziweyo. Eli nqaku liluncedo xa kufuneka ugxile kwiinkcukacha ezithile okanye izinto kumgama ohlukeneyo.
Ukukhetha phakathi kwe-darifocal kunye neelensi ezisisigxina kuxhomekeke kwiimfuno ezithile zokuhlola. Iilensi ezimisiweyo zifanelekile xa indawo rhoqo yembono kunye nenqanaba lokusondeza zanele, kwaye akukho mfuneko yokuhlengahlengisa imbono yekhamera.
Iilensi ze-darifocalziguquguqukayo kwaye ziluncedo xa ziguquguquka kwimmandla yembono kunye nokusondeza ifunwa, zivumela ukuba kubekho ukulungiswa ukuze kuqondwe kwi-sundorionce.
I-Post Time: Aug-09-2023
