I-varifocal CCTV lens iwuhlobo lwamalensi ekhamera avumela ukulungiswa okuguquguqukayo kobude befocal. Lokhu kusho ukuthi ilensi ingalungiswa ukuze inikeze i-engeli yokubuka ehlukile, okukuvumela ukuthi usondeze noma uhlehlise isihloko.
Amalensi e-Varifocal avame ukusetshenziswa kumakhamera okuphepha ngoba ahlinzeka ngokuguquguquka ngokuya ngenkundla yokubuka. Isibonelo, uma udinga ukuqapha indawo enkulu, ungasetha ilensi ibe i-engeli ebanzi ukuze uthwebule indawo eyengeziwe. Kungenjalo, uma udinga ukugxila endaweni ethile noma entweni, ungasondeza ukuze uthole ukubhekisisa.
Uma kuqhathaniswa namalensi angaguquki, anobude bokugxila obubodwa, obumile, amalensi ahlukahlukene anikeza ukuguquguquka okwengeziwe mayelana nokubekwa kwekhamera nokumbozwa kwesigcawu. Nokho, ngokuvamile abiza kakhulu kunamalensi angashintshi, futhi adinga ukulungiswa okwengeziwe nokulinganisa ukuze kuqinisekiswe ukusebenza kahle.
Njengoba kuqhathaniswa ai-parfocal(“yeqiniso”) ilensi yokusondeza, ehlala igxilile njengoba ilensi isondeza (ubude obugxilile noshintsho lokukhulisa), ilensi eguquguqukayo iyilensi yekhamera enobude bokugxila obuguquguqukayo lapho ukugxila kushintsha khona njengoba ubude bokugxila (kanye nokukhulisa) kushintsha. Amalensi amaningi abizwa ngokuthi “zoom”, ikakhulukazi endabeni yamakhamera amalensi angashintshi, empeleni angamalensi ahlukahlukene, anikeza abaklami bamalensi ukuguquguquka okwengeziwe ekuhwebeni kwedizayini yokubona (ibanga lobude obugxilwe, indawo enkulu yokuvula, usayizi, isisindo, izindleko) kunokusondeza kwe-parfocal.