Video: Lub koob yees duab yog lens?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A lub koob yees duab lens (tseem hu ua photographic lens los yog lub hom phiaj yees duab) yog qhov kho qhov muag lens orassembly ntawm lo ntsiab muag siv ua ke nrog a koob yees duab lub cev thiab cov txheej txheem los ua cov duab ntawm cov khoom xws li hauv photographicfilm lossis lwm yam xov xwm muaj peev xwm khaws cia cov duab chemically orelectronically.
Raws li, lub lens hauv lub koob yees duab ua haujlwm li cas?
Txhawm rau muab nws yooj yim, cov kab teeb pom kev sib kis tau sib nrug thaum lawv taug kev mus rau qhov screen. Tib yam hauv paus tshwm sim hauv a koob yees duab . Raws li qhov kev ncua deb ntawm lub lens thiab qhov realimage nce, lub teeb beams nthuav tawm ntau dua, tsim ib daim duab loj dua. Tab sis qhov loj ntawm zaj duab xis nyob twj ywm.
Kuj Paub, lub koob yees duab lo ntsiab muag ntsuas li cas? Tag nrho lo ntsiab muag muaj tus lej "mm" sau rau ntawm qhov chaw. Qhov luv luv ntawm mm yog "focal length," uas yog ntsuas ib millimeters. Ib txhia lo ntsiab muag muaj qhov ntev ntawm focal ntev, xws li 18mm txog 55mm, thaum lwm tus muaj ib qho, "taw" focal ntev.
Ib yam li ntawd, nws yog nug, lub koob yees duab muaj pes tsawg lo ntsiab muag?
Cia peb ua nws yooj yim!
| FOCAL LENGTH | TSEEM CEEB |
|---|---|
| 8-24 hli | Fisheye (Ultra-dav) |
| 24-35 hli | Wide Angle |
| 35, 50, 85, 135 mm | Standard Prime |
| 55-200 hli | Zoom |
Hom lo ntsiab muag yog dab tsi?
Muaj ob lub ntsiab hom lo ntsiab muag , paub asconvex (los yog converging) thiab concave (los yog diverging).
Pom zoo:
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