Hi Michael

It is my understanding that closing down a process lens for enlarging does not produce any ""Depth of Field" issues.
Enlarging process lenses are made to be flat field and you may only see a slight depth of focus.
Closing down the lens should not give you better sharpness .
Apo lenses are made to work wide open or closed down with the sweet spot two stops from wide open on any lens. they are dramatically different than camera lenses.
I think this needs clarification as taking the logic that depth of field will pull a negative into focus , workers would start using f32 f22 .
Could someone help me on this issue as I have heard this before on previous threads and to my knowlege this is not the case.