07-18-2015, 09:30 PM
Quote:Test an Otus 55mm f1.4 or a 50mm f1.4 Art for reference. That then will give an idea on how to 'see" the results?
+1
SLRgear has a set of Sigma 70mm APO Macros in every lens mount that they use as a reference for each system.
But I think any moderate 50mm (i.e. f/1.7/f/1.8 or macro) at f/8 would be good enough to set a reference.