Ungayikhetha kanjani ilensi enhle kakhulu yekhamera yakho yezokuphepha?

一,Izinhlobo zamalensi wekhamera yezokuphepha:

Amalensi wekhamera yezokuphepha aza ngezinhlobo ezahlukene, ngalinye lenzelwe ukuhambisana nezidingo ezithile zokubhekwa. Ukuqonda izinhlobo zama-lens atholakalayo kungakusiza ukhethe okulungile ngokusetha ikhamera yakho yezokuphepha. Nazi izinhlobo ezivame kakhuluAma-lens wekhamera yezokuphepha:

1,I-lens elungisiwe: Ilensi ehleliwe inobude obuphelele kanye nomkhakha wokubuka, ongakwazi ukulungiswa. Kuyindlela esebenza ngemali ebiza kakhulu efanelekile ukuqapha indawo ethile ngaphandle kwesidingo sokulungiswa njalo. Ama-lens ahleliwe ayatholakala ngobude obuhlukile bokugxila, okuvumela ukuthi ukhethe inkambu yokubuka oyifunayo.

2,Ilensi ye-Varifocal: Ilensi ye-varifocal inikezela ubude obuhle bokugxila, okuvumela ukuthi ushintshe inkambu yokubuka ngesandla. Inika ukuguquguquka ekuguquleni izinga lokusondeza futhi lilungele izimo lapho indawo yokubheka khona ingashintsha noma idinga amazinga ahlukahlukene wemininingwane. Amalensi ahlukahlukene asetshenziswa kakhulu ezimweni lapho kudingeka khona ukusebenza ngokuzema kwezezimali, njengokubhekwa kwangaphandle.

3,Zoom lens:Ilensi yokusondeza ihlinzeka amandla okuguqula ubude obugxile kanye nensimu yokubuka ukude. Ivumela bobabili ukusondeza okubonakalayo kanye nokusondeza kwedijithali. Ukusondeza kwe-Optical kugcina ikhwalithi yesithombe ngokulungisa izinto zelensi, ngenkathi ukusondeza kwedijithali kukhulisa isithombe ngedijithali, okuholela ekulahlekelweni kwekhwalithi yesithombe. Amalensi wokusondeza asetshenziswa kakhulu kuzinhlelo zokusebenza lapho ukuqapha okukude kanye nekhono lokuthwebula imininingwane enhle kubalulekile, njengasezindaweni ezinkulu zangaphakathi noma zangaphandle.

4,Ilensi enobubanzi: Ilensi ebanzi e-angle inobude bokugxila okufushane, okuholela emkhakheni obanzi wokubuka. Kufanelekile ukuqapha izindawo ezinkulu noma izikhala ezivulekile lapho kuthumba umbono obanzi kubalulekile. Ama-lens e-wide-angle ajwayele ukusetshenziswa ezimweni zokubhekwa njengezindawo zokupaka izimoto, izindawo zokugcina impahla, noma ukuqapha indawo yangaphandle.

5,Telephoto lens: Ilensi ye-telephoto inobude obude kakhulu, ukuhlinzeka inkambu emincane yokubuka nokukhulisa okukhulu. Ilungele ukuqapha ububanzi obude noma izimo lapho kuthumba imininingwane ethile kusuka kude kubalulekile. Amalensi we-Telephoto ajwayele ukusetshenziswa kwezicelo ezifana nokuqashelwa kwepuleti yelayisense, ukuhlonza kobuso, noma ukuqapha amaphuzu abucayi avela kude.

6,I-Pinhole Lens:I-Pinhole Lens iyilensi ekhethekile encane kakhulu futhi eqondayo. Kuklanyelwe ukufihlwa ngaphakathi kwezinto noma izindawo eziphansi, okuvumela ukubhekwa okufihliwe. Amalensi wePinhole asetshenziswa kakhulu ezimweni lapho ikhamera idinga ukufihlwa noma ukucekelwa phansi, njengaku-ATM, ama-Peepholes emnyango, noma imisebenzi yokubhekwa kokumboza.

二,Ungayikhetha kanjani ilensi enhle kakhulu yekhamera yakho yezokuphepha?

Ukukhetha lens engcono kakhulu yekhamera yakho yezokuphepha kuyisinyathelo esibalulekile ekuqinisekiseni ukusebenza kahle kanye nokuthwebula i-Phezulu nekhwalithi ephezulu. Nazi ezinye izinto okufanele zicatshangelwe lapho ukhetha ilensi:

Uhlobo lwekhamera:Nquma uhlobo lwekhamera yezokuphepha onakho noma ohlela ukuyithenga. Izinhlobo ezahlukahlukene zekhamera, ezinjengenhlamvu, i-dome, noma i-PTZ (i-pan-tilt-zoom), zingadinga izinhlobo ezithile zelensi noma osayizi.

Ubude obugxile: Ubude obugxile bunquma inkambu yokubuka kanye nezinga lokusondeza. Kukalwa ngamamilimitha (mm). Khetha ubude obugxile obufanela izidingo zakho ezithile. Nazi ezinye izinketho ezivamile:

Ilensi enobubanzi(2.8mm to 8mm): Inikeza inkambu ebanzi yokubuka, efanelekile ukumboza izindawo ezinkulu noma ukuqapha izikhala ezibanzi.

Ilensi ejwayelekile (8mm kuya ku-12mm): Inikeza umbono olinganiselayo ofanele izinhlelo zokusebenza ezijwayelekile zokubhekwa.

I-Telephoto Lens (12mm nangaphezulu): Inikeza inkambu emincane yokubuka kepha inikezela amandla okusondeza okukhulu kokuqapha okude noma okusondelene kakhulu.

Inkambu yokubuka (i-FOV): Cabanga ngendawo ofuna ukuyiqapha kanye nezinga lemininingwane edingekayo. Inkambu ebanzi yokubuka iyasiza ezindaweni ezinkulu ezivulekile, kuyilapho i-FOV emincane ingcono ezindaweni ezithile ezihlosiwe ezidinga ukubonwa okusondelene.

Umphetho: Ukuhlobisa kunquma amandla okubuthana akhanyayo we-lens. Imelelwa yinombolo ye-F (isib., F / 1.4, F / 2.8). Inombolo ephansi ye-F ibonisa i-aperture ebanzi, ivumela ukukhanya okwengeziwe ukufaka ilensi. I-aperture ebanzi inenzuzo ezimeni eziphansi noma zokuthwebula izithombe ezicacile ebumnyameni.

Ukufaneleka kwezithombe ukufaneleka: Qinisekisa ukuthi ilensi iyahambisana nosayizi we-sensor yesithombe yekhamera yakho. Amasayizi ajwayelekile sensor sensor afaka u-1/3 ", 1 / 2.7", no-1 / 2.5 ". Kusetshenziswa ilensi eyenzelwe usayizi we-sensor efanele isiza ukugcina ikhwalithi ye-Image futhi igweme ukuthuthuka noma ukuhlanekezela kwesithombe.

Lens mounI-T: Bheka uhlobo lwe-lens Mount oludingekayo kwikhamera yakho. Izinhlobo zeNtamu Ejwayelekile zifaka phakathi i-CS Mount ne-C Mount. Qinisekisa ukuthi ilensi oyikhethayo ifana nohlobo lweNtaba yekhamera.

I-Varifocal vs Fixed Lens:Amalensi ahlukahlukene avumela ukuthi uguqule ubude obugxile kulo, uhlinzeka ngezimo eziguquguqukayo ukuze ushintshe inkambu yokubuka njengoba kudingeka. Ama-lens ahleliwe anobude obugxile ekugxilwe ngaphambili futhi anikeze umkhamu wokubuka ohleliwe. Khetha uhlobo olufanele ngokuya ngezidingo zakho zokubhekwa.

Isabelomali:Cabanga ngesabelomali sakho lapho ukhetha ilensi. Amalensi asezingeni eliphakeme ngezinto ezithuthukile angabiza kakhulu kepha anganikeza ikhwalithi yesithombe engcono nokuqina.

Umenzi nezibuyekezo:Abakhiqizi abadumile abaqeqeshiwe abasebenza ngokukhethekile amalensi wekhamera yezokuphepha. Funda Ukubuyekezwa Kwamakhasimende futhi ufune izincomo ukuqinisekisa ukuthi ukhetha umkhiqizo onokwethenjelwa nodume.

三,Ukukhetha ilensi e-Indoor vs. Outdoor: Uyini umehluko?

Lapho ukhetha ilensi yokubhekwa ngaphakathi noma kwangaphandle, kukhona umehluko obalulekile ongawubheka ngenxa yezimpawu ezihlukile zalezi zindawo. Nakhu okudingeka ukwazi:

Izimo zokukhanyisa:Izimo zangaphandle zivame ukuba nezimo ezishintshashintshayo zokukhanyisa, kufaka phakathi ukukhanya kwelanga okukhanyayo, izithunzi kanye nezimo eziphansi ngesikhathi sasebusuku. Izindawo zasendlini, ngakolunye uhlangothi, zinezimo zokukhanya ezilawulwa kakhulu ngokukhanyisa okungaguquki. Ngakho-ke, ukukhethwa kwamalensi kufanele kubhekwe nezinselelo ezithile zokukhanyisa indawo ngayinye.

-Ngaphandle:Khetha i-lens nge-aperture ebanzi (inombolo ephansi ye-F) ukuqoqa ukukhanya okwengeziwe ezimeni eziphansi. Lokhu kuqinisekisa ukubonakala okungcono nekhwalithi yesithombe ngesikhathi sokuhlwa, kokusa, noma ubusuku. Ngaphezu kwalokho, amalensi anamakhono amahle ashukumisayo angaphatha umehluko phakathi kwezindawo ezikhanyayo nezindawo ezivuthiwe ngempumelelo.

Indlu: Njengoba izindawo zasendlini zivame ukuba nokukhanya okungaguquki, amalensi anokulinganiselwa ngokulinganiselayo kungenzeka anele. I-lens enenombolo ephakeme ka-F ephakeme kakhulu isengaletha ikhwalithi enhle yesithombe ezilungiselelweni zangaphakathi ngaphandle kwesidingo samakhono amakhulu e-alterture.

Inkambu yokubuka:Inkambu edingekayo yokubuka ingahluka ngokuya ngosayizi nokuhlelwa kwendawo yokubheka.

Ngaphandle: Izindawo ezingaphandle zivame ukudinga insimu ebanzi yokubuka ukuqapha izikhala ezinkulu ngempumelelo. Ama-lens e-wide-angle ajwayele ukusetshenziselwa ukuthwebula umbono obanzi, ikakhulukazi ezindaweni ezivulekile njengezindawo zokupaka noma ama-expretiors.

Indlu: Inkambu yokubuka yokubhekwa ngaphakathi ingahluka ngokuya ngendawo ethile ebhekwa. Kwezinye izimo, ama-lens angu-wide-angle angahle alungele ukumboza igumbi elikhudlwana noma ihale. Kodwa-ke, ezikhaleni ezinzima noma lapho kudingeka khona ukuqapha okuningiliziwe, ilensi enenkambu emincane yokubuka noma ikhono lokuguqula ubude obugxile (i-varifocal lens) lingakhethwa.

Ukumelana Nesimo Sezulu: Amakhamera wokubhekwa kwangaphandle namalensi kufanele aklanyelwe ukubekezelela isimo sezulu esinzima, njengemvula, iqhwa, uthuli, noma amazinga okushisa athe xaxa. Kubalulekile ukuthi ukhethe ama-lens enzelwe ngokukhethekile ukusetshenziswa kwangaphandle, okuvame ukuza nezici ezilwa nokungamelana nesimo sezulu njengokuvalelwa okuvaliwe ukuvikela umswakama kanye nemfucumfucu.

Ukumelana Nobumbango:Ezindaweni zangaphandle, kunengozi enkulu yokucekelwa phansi noma ukuphazamiseka. Bheka ama-lens ngezinto ezivikelayo ezifana nokumelana naphansi komthelela noma ama-domes ukuvikela umonakalo futhi aqinisekise ukusebenza kwekhamera nekhwalithi yesithombe ayonakaliswa.

Ir Ukuvumelana Ukuvumelana:Uma uhlelo lwakho lokuhlola lufaka ukukhanyiswa kwe-infrared (IR) kombono wobusuku, qiniseka ukuthi ilensi iyahambisana nokukhanya kwe-IR. Amanye amalensi angaba nesihlungi se-Ir-cut ukuze athuthukise ikhwalithi yesithombe phakathi nosuku ngenkathi evumela ukukhanya okusebenzayo kwe-IR ebusuku.