https://sonyalpha.blog/2019/11/10/which-lenses-to-maximise-the-potential-of-the-sony-a7riv/
汁
原作者係用a7r4去試
Outstanding
At this grade you exploit the full potential of the 61Mpix sensor
Everything is tack sharp even on a 100% Crop with excellent contrast
Very few lenses will achieve this grade on the entire frame
Excellent
At this grade you reach excellent results , it is only by comparing to an outstanding lens that you can see that you can do a little bit better
This is the grade that will exploit the full potential of 42Mpix of the Sony A7RIII
Lenses at the grade are perfectly OK on the Sony A7RIV
Very Good
At this grade you still get very good result but expect the start of some softness when viewing a 100% crop of 61Mpix
This is the grade that will exploit the full potential of 24Mpix of the Sony A7III
Lenses at that grade are not enough to exploit the A7RIV at any aperture but still give good results if you don’t crop heavily in the pictures
Typically some Excellent prime will fall in this category when used Wide open
Good
At this grade the image is still good when viewed globally but lack sharpness when viewed at 100%
Those lenses are still recommended for A7III but are not recommended on the A7RIII
Those lenses are not adequate for A7RIV
Average
Those lenses can barely achieve very good results when aperture is closed down and in general they are not even on the entire frame
Those lenses are not adequate for A7RIII, A7RIV
Those lenses are acceptable on a A7III but do not exploit the potential of the 24Mpix
Bad
Those give bad results when viewed at 100% on the all bodies (A7III, A7RIII, A7RIV)
Only Ok for TV viewing , computer if not zoom in