Ukuthambekela kwe-lens, eyaziwa ngokuthi "idayphagm" noma "iris", ukuvulwa kokukhanya okungena kukhamera. Ngokubanzi lokhu kuvulwa kuyinto, inani elikhudlwana lokukhanya lingafinyelela inzwa yekhamera, ngaleyo ndlela lithonye ukubonakaliswa kwesithombe.
I-apertate ebanzi (inombolo encane ye-F Ngakolunye uhlangothi, i-apertere emncane (inombolo enkulu ye-F) yehlisa inani lokukhanya okufaka ilensi, okuholela ekujuleni okukhulu kwensimu.
Ubukhulu benani le-apertire limelelwa inombolo ye-F. Inombolo ye-F enkulu, incane i-flux ekhanyayo; Ngakolunye uhlangothi, kulapho kukhanya khona inani lokukhanya. Isibonelo, ngokulungisa i-apertilure yekhamera ye-CCTV kusuka ku-F2.0 kuya ku-F1.0, inzwa ithole ukukhanya okuningana okuningana kunangaphambili. Lokhu kunyuka okuqondile kwenani lokukhanya kungaba nemithelela eminingana ezuzisayo kwikhwalithi yesithombe jikelele. Ezinye zalezi zinzuzo zifaka phakathi ukufiphala okusheshayo okuncishisiwe, ama-lens amancane amancane, nezinye izithuthukisi eziphelele zokusebenza okuphansi.
Kumakhamera wokubhekisisa iningi, i-aperture inosayizi ohleliwe futhi ayikwazi ukushintshwa ukuze kuguqulwe ukwanda noma ukwehla kokukhanya. Inhloso ukunciphisa ubulukhuni bedivayisi ephelele bese usika izindleko. Ngenxa yalokho, la makhamera we-CCTV ajwayele ukuhlangana nobunzima obukhulu ekudubuleni ngezimo ezifile kakhulu kunasendaweni elikhanyiswe kahle. Ukunxephezela lokhu, amakhamera ngokuvamile anokukhanya okwenziwe nge-infrared, sebenzisa izihlungi ezingezinhle, lungisa ijubane le-shutter, noma uqashe uchungechunge lwezithuthukisi zesoftware. Lezi zici ezingeziwe zinezinzuzo zazo nezinzuzo zazo; Kodwa-ke, uma kukhulunywa ngokusebenza okukhanyayo okuphansi, akukho zindlela ezingase zithathe ngokuphelele i-aperture enkulu.
Emakethe, izinhlobo ezahlukene zelensi yekhamera yezokuphepha zikhona, njengamalensi webhodi le-Iris le-Iris, ama-Iris CS Mount lens, amalensi agxile e-Iris we-IRIS, i-FC Iris lens, kanye ne-F5.6, ukumboza i-Iris elungisiwe, futhi I-Auto Iris. Ungenza ukhetho olususelwa kwizidingo zakho futhi uthole isilinganiso sokuncintisana.
Isikhathi sePosi: Aug-28-2024