Nws raug nqi npaum li cas los tsim lub koob yees duab lens?
Nws raug nqi npaum li cas los tsim lub koob yees duab lens?

Video: Nws raug nqi npaum li cas los tsim lub koob yees duab lens?

Video: Nws raug nqi npaum li cas los tsim lub koob yees duab lens?
Video: ib sim cas tsis tsim nyog tsom xyooj 2022 2024, Kaum ib hlis
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Koj tuaj yeem cia siab tias yuav them ib ncig $ 1000 txhua qhov yog tias koj tab tom yuav ib qho kev cai ua lo ntsiab muag . Tib yam lens inquantity ntawm 100 tuaj yeem raug nqi tsawg dua $50.

Ntawm no, lub koob yees duab lens nqi npaum li cas?

Cia siab tias yuav them $ 100 txog $ 2, 000 lossis ntau dua rau tus qauv zoom lens . Sigma 24-70mm F2.8 EX DG[1] tus nqi txog $ 570 thiab yog tsim los siv rau hauv ob qho tib si DSLRs thiab 35mm SLRs thiab suav nrog mounts rau Sigma, Canon, Nikon, Sony / Minolta thiab Pentax koob yees duab . Wide-angle lo ntsiab muag Nws yog qhov zoo rau kev thaij duab panoramic ntawm toj roob hauv pes.

Lub koob yees duab lo ntsiab muag ua li cas? Lens yog ua ntawm optical iav orplastic. A lub koob yees duab lens txo cov teebmeem ntawm aberrations byreplacing ib qho yooj yim lens nrog ib pab pawg ntawm lo ntsiab muag hu ua lens cov ntsiab lus, uas yog lo ntsiab muag ntawm txawv shapesand nrug ntawm kev sib cais. Cov lens ua ntau complexas ntau dua kev kho ntawm lub zeem muag yog tiav.

Tib neeg kuj nug, dab tsi ua rau lub koob yees duab lo ntsiab muag kim?

Raws li tau hais saum toj no, lo ntsiab muag uas yog hlub los ntawm cov kws yees duab ( yog li ntawd - hu ua "ceev" lo ntsiab muag nrog dav siab tshaj plaws apertures) ntau dua kim rau ua feem ntau, tshwj xeeb tshaj yog ifyour focal ntev ntev, vim hais tias ntawm cov iav tivthaiv yuav tsum tau mus rau hauv kev tsim lub lens.

Vim li cas 35mm lo ntsiab muag thiaj li kim?

Yog vim li cas 35mm lens yog ntau kim yog vim flange rau sensor nrug ntawm SLR. Lub SLR xav tau ib lub thawv iav kom haum ntawm qhov lens mount thiab thefilm los yog sensor. Mirrorless lub cev muaj qhov zoo dua qub thaum nws los txog rau lub kaum ntse ntse lo ntsiab muag , cov lens tsim yuav besimple thiab me me.

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