Would be interesting if every lens holds up same quality stoped all way down or if it would also give some strong differences!
I used my APO Ronar 360mm not to long ago at f 64 because it was needed and wanted and I was really surprised about the sharpness I got out of it and I had the impression it was a tick sharper then my 360mm Sironar N would have been at the same f stop!
So somewhere in the future I have to do a little test!
Cheers Armin
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