如果是室内照，大光圈不是必要的。
please use F0.7
please use F0.7
偶IQ太低，没听懂。
一定范围下，光圈越小细节表现越清晰。。。。。。
zeiss made 50mm/0.7 for 35 mm cameras beforethis is the only general purpose photography lens that i know with F number at 0.7
there are lenses with apertures even larger than F/0.7, they are built for special purposes though
the theoritical limit for lens designed for use in air is around f/0.7
do not forget there are oil and glycerol lenses
negative...be aware of diffractionuse optimum aperture instead if conditions permit
一定范围下（人像头的表现范围下）
你这理论哪里来的？从没听过。BTW，哪个镜头能有F0.7？我是井底蛙，闻所未闻。
it is the direct interpenetration
it is the direct interpenetration for statement "higher F value, (is) a indication of higher defectiveness of mm" by ID iloveyouso.
it is the direct interpenetrationit is the direct interpenetration for statement "higher F value, (is) a indication of higher defectiveness of mm" by ID iloveyouso.
pefectiveness, correction
pefectiveness, correction
perfectiveness
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