From top to bottom are at F/1.8, F/2, F/2.8, F/4, F/5.6, F/8, F/11, F/16, F/22.
Left 2 columns are sagittal and tangential at frame center.
Middle 2 columns are sagittal and tangential at 1/2 of frame.
Right 2 columns are sagittal and tangential at frame border.
The number 36 means there are 3600 lines across the vertical of frame(each step is 300 lines).
Regarding the detail of the test procedure please reference to "鏡頭測試項目解說".
Comment:
This wide angle lens has two problem, one is the sharpness at 1/2 of frame is not good, the other is the optical element alignment is not at optimum. This is the 4 corners sharpness compare(hit for the 1600 pixel picture):
As you can see the sharpness at down left corner is far better than the others. So the optical elements alignment is a series problem. Just like most of the 3'rd tier manufactures Sigma, Voigtlander, Samyang and etc. They can't control the quality of mass production well.
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