Lens rau Canon: ib tug txheej txheem cej luam

Lens - ib tug optical system, kis tau los ntawm nws mus rau hauv lub tshuab teeb, dua cov lus qhia txog cov kev kawm. Nyob rau hauv qhov tseeb kev xaiv ntawm lens yuav yog nyob ntawm seb clarity ntawm daim duab, qhov zoo ntawm cov kis xim. Rau beginners, xaiv xws li ib tug ntaus ntawv, nws yuav tsum tau nco ntsoov tias loj thiab dav lens ntawm lub koob yees duab, qhov ntau yuav ua ib tug zoo daim duab.

Cov tsab xov xwm no mob siab mus rau ib tug nyuag saib xyuas ntawm lub Canon hom ntawm optical systems. Qhov no ruaj yog ib tug ntawm cov thawj coj nyob rau hauv qhuav ntawm photographic khoom. Peb xav txog txoj kab txoj kev feem ntau nrov ntawm pib xyaum ua optics nrog ib tug focal ntev ntawm 50 mm rau Canon koob yees duab. Cov pab kiag li lawm yog feem ntau siv raws li ib tug portrait lens.

Rau hnub tim, plaub caw cov neeg siv 'tsib caug duas las "nrog rau cov nram qab no specifications: aperture los yog aperture - ƒ / 2,5, ƒ / 1,8, ƒ / 1,4 thiab ƒ / 1,2. Thawj los ntawm cov lens rau Canon nrog Aperture 2.5 yog heev txog ntaus ntawv - ib tug tshwj xeeb macro lens. Nws sawv tawm los ntawm tag nrho cov xov tooj thiab muaj ib tug ncaj nqaim daim ntawv thov, ces peb hais txog nws nyob rau hauv dua, thiab nyob rau nws lawm yuav tsis.

Xav txog cov feem ntau pheej yig tus nqi nyob rau hauv lub lens rau Canon EF50 hli ƒ / 1.8II. Qhov no ntaus ntawv twb tso tawm nyob rau hauv 1991. Nws yog yus muaj los ntawm nruab nrab zoo thiab, tseem ceeb tshaj, uas tsis muaj nqi. Nrog cov tsis nws yog heev nrov ntawm kev pab txog. Txawm muaj ntau yam amatours yuav pom cov Canon lo ntsiab muag. Nqi rau xws li ib tug ntaus ntawv yog nyob rau hauv lub chav 3000 rubles.

Piav kho qhov muag system xyoo cov thawj version ntawm lub "tsib caug duas las» CanonEF system. Cov pab kiag li lawm txawv tsuas tsim, optics muaj kiag li tib yam. Lub lens chim yog ua los ntawm yas, txawm tias ib tug fixture mount yog ua los ntawm cov yas. Kev sib piv, tus thawj embodiment twb manufactured nyob rau hauv ib tug hlau vaj tse nyob.

Qhov thib ob xav lens rau Canon - EF50 hli ƒ / 1.4USM. Xam tias yog nruab nrab nyob rau hauv txoj kab ntawm "tsib caug" Canon lub tuam txhab. Cov qauv no yog zoo npaum li cas tshaj yav dhau los lens. Lub tsev nyob yog ua los ntawm ib tug ntau robust thiab zoo yas, qab ntxiag mus rau kov, bayonet fastening - nws yog xim hlau. Txawm li cas los, qhov no lens rau Canon muaj ib tug tseem ceeb drawback - ib tug es flimsy yas "proboscis", uas extends rau kev tsom xam. Heev feem ntau, vim hais tias ntawm cov teeb meem nrog rau qhov no lub caij ntawm lub lens yog rau cov kev pab center.

Qhov thib peb ntaus ntawv yog npaj rau kev saib xyuas - ib tug lens Canon 50 hli EF ƒ / 1.2L USM. Lub tsev nyob yog ua los ntawm ib tug heev zoo yas, bayonet fastening - nws yog xim hlau. Lub lens muaj ib tug me me luaj li cas, tab sis lub unit qhov ceeb thawj yog 550 grams. Lub tsev nyob ntawm lub Canon 50 hli EF ƒ / 1.2L USM - water- thiab dustproof. Nws tshem tawm cov tsis muaj ntawm cov thawj ua qauv, uas yog lub tsis muaj zawv zawg ntsiab. Thaum tsom lens pem hauv ntej lens mus sib sib zog nqus rau hauv lub cev.

Qhov no xaus peb xyuas ntawm Canon lo ntsiab muag. Nws muaj peev xwm yuav xaus lus tias tus kho qhov muag system ntawm no hom muaj ib tug heev khoom ua tau zoo, lawv yuav tau mus sib tw nyob rau hauv sib npaug zos cov ntsiab lus nrog rau tag nrho cov ntiaj teb no cov thawj coj nyob rau hauv qhov siv thiab ua photographic khoom.