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1.67 MR-7 Xiav Txiav HMC Optical lenses
Raws li tus qauv ISO, cov tsom iav tiv thaiv teeb xiav uas thaiv tau ntau tshaj 20% yog pom zoo rau kev siv txhua hnub ntawm cov khoom siv LED digital xws li TV, khoos phis tawj, pads thiab xov tooj ntawm tes. Cov tsom iav tiv thaiv teeb xiav uas thaiv tau ntau tshaj 40% raws li tus qauv ISO yog pom zoo rau cov neeg uas saib lub vijtsam ntau tshaj 8 teev hauv ib hnub. Vim tias cov tsom iav tiv thaiv teeb xiav lim tau ib feem ntawm lub teeb xiav, daim duab yuav daj thaum saib cov khoom, nws raug pom zoo kom hnav ob khub tsom iav, ib khub tsom iav ib txwm rau kev siv txhua hnub, thiab ib khub tsom iav tiv thaiv teeb xiav uas thaiv tau ntau tshaj 40% rau kev siv cov khoom siv LED digital xws li khoos phis tawj. Cov tsom iav tiv thaiv teeb xiav tiaj tiaj (tsis muaj degree) yog nrov heev ntawm cov neeg siv uas tsis muaj myopic, tshwj xeeb tshaj yog rau kev hnav khoos phis tawj hauv chaw ua haujlwm, thiab maj mam dhau los ua zam.
