This lens is sharp as hell.
http://mikeonthestreet.com/2016/05/30/sony-90mm-f2-8-macro-review/
Chris Niccolls Shoots Macro Photography
Sharpness is really very impressive. Center results are excellent from F2.8 to F16, remaining very good even at F22 as diffraction starts to take the edge off things. Edge sharpness is very good level at f/2.8 and is excellent from F4 to F16. At F22 diffraction reduces edge sharpness but results remain good.
https://www.ephotozine.com/article/sony-fe-90mm-f-2-8-macro-g-oss-lens-review-29635
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