Ungayikhetha Kanjani Ilensi Engcono Kakhulu Yekhamera Yakho Yokuphepha?

一,Izinhlobo zamalensi ekhamera yokuvikela:

Amalensi ekhamera okuphepha eza ngezinhlobo ezahlukene, ngayinye yakhelwe ukuhambisana nezidingo ezithile zokugada. Ukuqonda izinhlobo zamalensi atholakalayo kungakusiza ukuthi ukhethe elungile yokusethwa kwekhamera yakho yokuvikela. Nazi izinhlobo ezivame kakhuluamalensi ekhamera yokuphepha:

1,Ilensi Elungisiwe: Ilensi egxilile inobude bokugxila okukodwa kanye nenkundla yokubuka, engakwazi ukulungiswa. Kuyindlela engabizi kakhulu efanele ukuqapha indawo ethile ngaphandle kwesidingo sokulungiswa njalo. Amalensi angaguquki atholakala ngobude obuhlukene bokugxila, okukuvumela ukuthi ukhethe indawo yokubuka oyifunayo.

2,I-Varifocal Lens: Ilensi ye-varifocal inikeza ubude bokugxila obulungisekayo, okukuvumela ukuthi uguqule inkambu yokubuka mathupha. Ihlinzeka ngokuguquguquka ekulungiseni izinga lokusondeza futhi ilungele izimo lapho indawo yokugada ingase ishintshe noma idinge amaleveli ahlukene emininingwane. Amalensi ahlukahlukene avame ukusetshenziswa ezimeni lapho kudingeka khona ukuguquguquka, njengokugada kwangaphandle.

3,Ilensi yokusondeza:I-zoom lens inikeza ikhono lokulungisa ubude bokugxila kanye nenkundla yokubuka ukude. Ivumela kokubili ukusondeza okubonakalayo nokusondeza kwedijithali. I-Optical zoom igcina ikhwalithi yesithombe ngokulungisa izici zelensi, kuyilapho ukusondeza kwedijithali kukhulisa isithombe ngokwedijithali, okuholela ekulahlekeni okungaba khona kwekhwalithi yesithombe. Amalensi okusondeza asetshenziswa kakhulu ezinhlelweni lapho ukuqapha okukude kanye nekhono lokuthwebula imininingwane emihle kubalulekile, njengendawo enkulu yasendlini noma yangaphandle.

4,I-Wide-Angle Lens: Ilensi ye-engeli ebanzi inobude bokugxila obufushane, okuholela endimeni yokubuka ebanzi. Ilungele ukuqapha izindawo ezinkulu noma izindawo ezivulekile lapho kubalulekile ukuthatha umbono obanzi. Amalensi ane-engeli ebanzi avame ukusetshenziswa ezimeni zokugada njengezindawo zokupaka, izindawo zokugcina izimpahla, noma ukuqapha kwe-perimeter yangaphandle.

5,I-Telephoto Lens: Ilensi ye-telephoto inobude bokugxila okude, ihlinzeka ngendawo yokubuka emincane kanye nokukhulisa okukhulu. Ilungele ukuqapha kwebanga elide noma izimo lapho ukuthwebula imininingwane ethile ukude kubalulekile. Amalensi e-telephoto ajwayele ukusetshenziselwa izinhlelo zokusebenza ezifana nokubonwa kwepuleti lelayisense, ukuhlonza ubuso, noma ukuqapha amaphuzu abalulekile ukude.

6,I-Pinhole Lens:I-pinhole lens ilensi ekhethekile incane kakhulu futhi inobuhlakani. Iklanyelwe ukufihlwa phakathi kwezinto noma izindawo, okuvumela ukugadwa okucashile. Amalensi e-Pinhole avame ukusetshenziswa ezimeni lapho ikhamera idinga ukufihlwa noma ihlakaniphe, njengakuma-ATM, izimbobo zezicabha, noma imisebenzi yokugada ecashile.

二,Ungayikhetha Kanjani Ilensi Engcono Kakhulu Yekhamera Yakho Yokuphepha?

Ukukhetha ilensi engcono kakhulu yekhamera yakho yokuvikela kuyisinyathelo esibalulekile sokuqinisekisa ukusebenza kahle nokuthwebula ividiyo yekhwalithi ephezulu. Nazi ezinye izici okufanele uzicabangele lapho ukhetha ilensi:

Uhlobo Lwekhamera:Nquma uhlobo lwekhamera yokuvikela onayo noma ohlela ukuyithenga. Izinhlobo zamakhamera ezihlukene, njengechashazi, idome, noma i-PTZ (i-pan-tilt-zoom), zingadinga izinhlobo ezithile zamalensi noma osayizi.

Ubude bokugxila: Ubude befocal bunquma inkambu yokubuka kanye nezinga lokusondeza. Ikalwa ngamamilimitha (mm). Khetha ubude bokugxila obufanele izidingo zakho ezithile. Nazi ezinye izinketho ezijwayelekile:

I-Wide-Angle Lens(2.8mm ukuya ku-8mm): Ihlinzeka ngendawo yokubuka ebanzi, elungele ukumboza izindawo ezinkulu noma ukuqapha izikhala ezibanzi.

Ilensi evamile (8mm ukuya ku-12mm): Inikeza umbono olinganiselayo ofanele izinhlelo zokusebenza zokugada okuvamile.

I-Telephoto Lens (12mm nangaphezulu): Ihlinzeka ngendawo yokubuka emincane kodwa inikeza amandla amakhulu okusondeza ekuqaphelweni kwebanga elide noma ukuvala okunemininingwane.

Inkambu yokubuka (FOV): Cabangela indawo ofuna ukuyiqapha kanye nezinga lemininingwane edingekayo. Umkhakha wokubuka obanzi uwusizo ezindaweni ezinkulu ezivulekile, kuyilapho i-FOV encane ingcono ezindaweni ezithile okuqondiwe kuzo ezidinga ukubhekwa eduze.

Imbobo: Imbobo inquma ikhono lelensi lokuqoqa ukukhanya. Imelwe inombolo engu-f (isb, f/1.4, f/2.8). Inombolo engu-f ephansi ikhombisa indawo ebanzi, evumela ukukhanya okwengeziwe ukuthi kungene kulensi. Indawo ebanzi inenzuzo ezimeni zokukhanya okuphansi noma ekuthwebuleni izithombe ezicacile ebumnyameni.

Ukuhambisana Kwenzwa Yesithombe: Qinisekisa ukuthi ilensi iyahambisana nosayizi wenzwa yesithombe yekhamera yakho. Osayizi benzwa yesithombe abajwayelekile bahlanganisa 1/3″, 1/2.7″, kanye no-1/2.5″. Ukusebenzisa ilensi edizayinelwe usayizi wenzwa olungile kusiza ukugcina ikhwalithi yesithombe futhi kugweme i-vignetting noma ukuhlanekezelwa kwesithombe.

I-Lens Mount: Hlola uhlobo lokukhweza ilensi oludingekayo kukhamera yakho. Izinhlobo zokukhweza ezijwayelekile zifaka i-CS mount kanye ne-C mount. Qinisekisa ukuthi ilensi oyikhethayo ifana nohlobo lokukhweza lwekhamera.

I-Varifocal vs. Ilensi Elungisiwe:Amalensi e-Varifocal akuvumela ukuthi ulungise ubude bokugxila ngesandla, anikeze ukuguquguquka ukuze ushintshe inkambu yokubuka njengoba kudingeka. Amalensi angashintshi anobude bokugxila obunqunywe kusengaphambili futhi anikeza inkambu yokubuka engashintshi. Khetha uhlobo olufanele ngokuya ngezidingo zakho zokugada.

Isabelomali:Cabangela ibhajethi yakho lapho ukhetha ilensi. Amalensi ekhwalithi ephezulu anezici ezithuthukile angase abize kakhulu kodwa anganikeza ikhwalithi yesithombe engcono nokuqina.

Umkhiqizi nezibuyekezo:Cwaninga abakhiqizi abahlonishwayo abasebenza ngokukhethekile kumalensi ekhamera yokuvikela. Funda ukubuyekezwa kwekhasimende futhi ufune izincomo ukuze uqinisekise ukuthi ukhetha umkhiqizo onokwethenjelwa nohloniphekile.

三,Ukukhetha Ilensi Yasendlini vs. Ngaphandle: Uyini Umehluko?

Lapho ukhetha ilensi yokugada kwangaphakathi noma kwangaphandle, kunomehluko omncane obalulekile okufanele ucatshangelwe ngenxa yezici ezihlukile zalezi zindawo. Nakhu okudingeka ukwazi:

Izimo zokukhanyisa:Izindawo ezingaphandle zivame ukuba nezimo zokukhanya ezihlukene, okuhlanganisa ukukhanya kwelanga, izithunzi, nezimo zokukhanya okuphansi phakathi nobusuku. Izindawo zasendlini, ngakolunye uhlangothi, ngokuvamile zinezimo zokukhanyisa ezilawulwa kakhulu ezinokukhanya okungaguquki. Ngakho-ke, ukukhethwa kwamalensi kufanele kucabangele izinselele ezithile zokukhanyisa endaweni ngayinye.

Ngaphandle:Khetha ilensi enembobo ebanzi (inombolo ye-f ephansi) ukuze uthole ukukhanya okwengeziwe ezimeni zokukhanya okuphansi. Lokhu kuqinisekisa ukubonakala okungcono nekhwalithi yesithombe phakathi nokuhwalala, ukusa, noma ebusuku. Ukwengeza, amalensi anekhono elihle lebanga eliguqukayo angakwazi ukuphatha umehluko phakathi kokukhanya kwelanga okukhanyayo nezindawo ezinethunzi ngempumelelo.

Ngaphakathi: Njengoba izindawo zasendlini ngokuvamile ziba nokukhanya okungaguquki, amalensi anezikhala ezimaphakathi angase anele. Ilensi ene-f-number ephakeme kancane isengaletha ikhwalithi yesithombe esihle kuzilungiselelo zasendlini ngaphandle kwesidingo samandla okungena okubanzi.

Inkambu yokubuka:Inkambu yokubuka edingekayo ingase yehluke ngokusekelwe kusayizi nesakhiwo sendawo yokugada.

Ngaphandle: Izindawo ezingaphandle ngokuvamile zidinga inkambu ebanzi yokubuka ukuze kuqashwe izindawo ezinkulu ngempumelelo. Amalensi ane-engeli ebanzi ajwayele ukusetshenziselwa ukuthwebula umbono obanzi, ikakhulukazi ezindaweni ezivulekile njengezindawo zokupaka noma ingaphandle lesakhiwo.

Ngaphakathi: Inkambu yokubuka yokugada kwangaphakathi ingahluka kuye ngendawo ethile egadwayo. Kwezinye izimo, ilensi ene-engeli ebanzi ingase ifaneleke ukumboza igumbi elikhulu noma iphasishi. Kodwa-ke, ezindaweni eziqinile noma lapho ukuqapha okunemininingwane kudingekile, ilensi enenkambu yokubuka emincane noma ikhono lokulungisa ubude bokugxila (i-varifocal lens) ingakhethwa.

Ukumelana Nesimo Sezulu: Amakhamera namalensi agada ngaphandle kufanele akhelwe ukumelana nezimo zezulu ezinzima, njengemvula, iqhwa, uthuli, noma amazinga okushisa aphezulu. Kubalulekile ukukhetha amalensi aklanyelwe ngokukhethekile ukusetshenziswa kwangaphandle, avame ukuza nezici ezimelana nesimo sezulu njengezivalo ezivaliwe ukuze zivikeleke kumswakama kanye nemfucumfucu.

Ukumelana ne-Vandal:Ezindaweni ezingaphandle, kunengozi enkulu yokucekelwa phansi kwempahla noma ukuphazamisa. Cabangela amalensi anezici zokuzivikela ezifana namakesi noma amadomu amelana nomthelela ukuze uvimbele umonakalo futhi uqinisekise ukuthi ukusebenza kwekhamera nekhwalithi yesithombe akukona.

Ukuhambisana kwe-IR:Uma isistimu yakho yokugada ihlanganisa ukukhanya kwe-infrared (IR) ukuze ubone ebusuku, qinisekisa ukuthi ilensi iyahambisana nokukhanya kwe-IR. Amanye amalensi angase abe nesihlungi se-IR-cut ukuthuthukisa ikhwalithi yesithombe phakathi nosuku kuyilapho evumela ukukhanya okusebenzayo kwe-IR ebusuku.