Nws yog ib qho koob yees duab APS-C thiab muaj ob hom kev xaiv qhov ntev ntawm lub lens, 25mm thiab 35mm.
Cov tsom iav APS-C yog cov tsom iav koob yees duab uas haum rau lub koob yees duab APS-C, uas muaj hom sensor txawv piv rau lwm lub koob yees duab. APS txhais tau tias Advanced Photo System, nrog C sawv cev rau "cropped," uas yog hom system. Yog li, nws tsis yog lub lens puv npo.
Advanced Photo System hom-C (APS-C) yog hom duab sensor uas muaj qhov loj sib npaug rau Advanced Photo System zaj duab xis tsis zoo hauv nws hom C (Classic), ntawm 25.1 × 16.7 hli, qhov sib piv ntawm 3: 2 thiab Ø 31.15 hli txoj kab uas hla.
Thaum siv lub lens APS-C rau lub koob yees duab puv npo, lub lens yuav tsis haum. Koj lub lens yuav thaiv ntau lub sensor ntawm lub koob yees duab thaum lawv ua haujlwm, ua rau koj daim duab luv. Nws kuj tseem tuaj yeem ua rau muaj ciam teb txawv txawv nyob ib puag ncig ntug ntawm daim duab vim tias koj txiav qee lub sensor ntawm lub koob yees duab.
Koj lub koob yees duab sensor thiab lens yuav tsum sib xws kom tau cov duab zoo tshaj plaws. Yog li ntawd, koj tsuas yog yuav tsum siv APS-C lens rau cov koob yees duab uas muaj APS-C sensors xwb.