一,WisigqokoLi-ens isetshenziswa ku-CCTVCamera?
Amakhamera e-CCTV angasebenzisa izinhlobo ezahlukene zamalensi kuye ngokuthi asetshenziswa kanjani kanye nombono ofiswayo. Nazi ezinye izinhlobo ezivamile zamalensi asetshenziswa kumakhamera e-CCTV:
Ilensi Engaguquki: La malensi anobude obuqondile futhi awakwazi ukulungiswa. Asetshenziselwa izinhlelo zokusebenza lapho insimu yokubuka ingadingi ukushintshwa.
Ilensi ye-Varifocal: La malensi avumela umsebenzisi ukuthi alungise ubude be-focal kanye nensimu yokubuka. Awusizo lapho ikhamera ifakiwe endaweni lapho ibanga phakathi kwekhamera nomuntu ongambona lingahluka khona.
Ilensi yokusondeza: Lawa malensi afana namalensi e-varifocal kodwa anikeza ububanzi obukhulu bokulungiswa kobude be-focal. Avumela umsebenzisi ukuthi asondeze noma asuse isithombe ngaphandle kokuhambisa ikhamera.
Ilensi ye-Pinhole: La malensi anembobo encane kakhulu, evumela ikhamera ukuthi ifihlwe ngaphakathi kwento encane noma umgodi wodonga.
Ukukhethwa kwelensi kuncike ezidingweni ezithile zohlelo lokusebenza, njengebanga eliya kumuntu ohlolwayo, izimo zokukhanya, kanye nensimu yokubuka oyifunayo.
二,WisigqokoDama-oesI-CCTVCi-ameraLama-enDo?
Ilensi ingenye yezingxenye ezibaluleke kakhulu zekhamera ye-CCTV, njengoba inesibopho sokuthwebula nokugxila ukukhanya ku-sensor yesithombe sekhamera. Ilensi inquma insimu yokubuka kanye nenani lokukhanya okungena kukhamera, okungaba nomthelela omkhulu ekhwalithini nasekucaceni kwesithombe esiphumayo.
Ilensi isebenza ngokugoba imisebe yokukhanya edlula kuyo, ngakho-ke ihlangana endaweni egxile ku-sensor yesithombe. Ibanga elisuka ku-lens kuya ku-sensor yesithombe, kanye nokugoba kwelensi, kunquma ubude be-focal kanye ne-engeli yokubuka kwekhamera.
Ilensi yekhamera ye-CCTV ingalungiswa noma ilungiswe, kuye ngezidingo ezithile zohlelo lokusebenza. Amalensi aqinile anobude obuqondile kanye nensimu yokubuka, kuyilapho amalensi alungisekayo, njengelensi ye-varifocal noma ye-zoom, angalungiswa ukuze ashintshe ubude obuqondile kanye nensimu yokubuka.
Ngamafuphi, ilensi yekhamera ye-CCTV idlala indima ebalulekile ekuthwebuleni izithombe ezisezingeni eliphezulu kanye namavidiyo. Ngokulawula inani lokukhanya okungena kukhamera kanye ne-engeli yokubuka, ilensi isiza ukuqinisekisa ukuthi ikhamera ithwebula indaba ehlosiwe ngezinga elifunekayo lemininingwane kanye nokucaca.
三,Indlela yokwenzaCfaka i-CCTVCi-ameraLi-ens?
Ukukhetha ilensi yekhamera ye-CCTV efanele kubalulekile ukuze uthole ikhwalithi yesithombe engcono kakhulu ohlelweni lwakho lokuphepha. Nazi ezinye izinto okufanele uzicabangele lapho ukhetha i-Ilensi ye-CCTV:
Ubude be-Focal: Ubude be-focal lens bunquma insimu yokubuka yekhamera, noma ukuthi ikhamera ingathwebula indawo engakanani. Uma udinga ukuqapha indawo enkulu, kuzodingeka ilensi ene-engeli ebanzi enobude obufushane be-focal. Ukuze kuqashwe indawo ethile, ilensi ene-engeli encishisiwe enobude obude be-focal ifaneleka kakhulu. Ungasebenzisa ama-calculator aku-inthanethi ukuthola ubude be-focal obufanele besicelo sakho ngokusekelwe ebangeni lesihloko kanye nensimu yokubuka oyifunayo.
Imbobo: Imbobo iwusayizi wembobo ekulensi evumela ukukhanya ukuthi kungene ekhamera. Imbobo enkulu (inombolo ephansi ka-f) izovumela ukukhanya okwengeziwe ukuthi kungene ekhamera, okuholela ezithombeni ezikhanyayo ezimweni zokukhanya okuphansi. Kodwa-ke, imbobo enkulu ingabangela ukujula kwensimu okungajulile, okungabangela ukuthi izinto ezingaphambili noma ngemuva zibonakale zingacacile.
Ukuhambisana: Qinisekisa ukuthi ilensi iyahambisana nemodeli yekhamera yakho kanye nosayizi wesenzi. Amakhamera ahlukene angaba nezinhlobo ezahlukene zokufaka, futhi akuwona wonke amalensi ahambisana nawo wonke amamodeli ekhamera.
Ikhwalithi Yesithombe: Khetha ilensi enekhwalithi enhle yesithombe, ezoqinisekisa ukuthi ikhamera ithwebula izithombe ezicacile nezinemininingwane.
IsabelomaliIzindleko zeamalensi ekhamera yokuphephakuyahlukahluka kuye ngobude be-focal, i-aperture, kanye nekhwalithi yesithombe. Nquma isabelomali sakho bese ukhetha ilensi ehlangabezana nezidingo zakho futhi ewela ngaphakathi kwesabelomali sakho.
Ngamafuphi, lapho ukhetha ilensi yekhamera ye-CCTV, cabanga ngobude be-focal, i-aperture, ukuhambisana, ikhwalithi yesithombe, kanye nesabelomali ukuqinisekisa ukuthi uthola ikhwalithi yesithombe engcono kakhulu yesistimu yakho yokuphepha.
Isikhathi sokuthunyelwe: Meyi-05-2023
