Ask God to answer some questions about photography! ! !

C depth of field has nothing to do with focusing, but aperture, focal length and object distance affect depth of field.

D strictly speaking, if the optical quality of the telephoto end of the lens is better than that of the wide-angle end, the image quality will also be improved.

B, Sony a7 series is full.

A (optical and electronic framing), c (electronic framing consumes high power)

c

B: Actually, there is no option for this question. The folding lens is not expensive, small in size and good in image quality. )