I'm looking into the possibility of using Digitar lenses with a P25, P45, or Aptus 75 back. Or possible 6x7 film.
From what I understand, the Digitars are optimized for f8 to f11. While I think in most cases that may provide enough depth of field for wide angles, I'm concerned that with longer lenses (120mm to 150mm), I may need to stop down to f22, even f32.
Does anyone have experience with the Digitars between f16 and f32? How do they perform relative to f8 - f11? Is a 120mm Digitar at f22 better or worse (in terms of sharpness and contrast) than a traditional Large Format lens at f22?
Also, how do the Digitars perform with film?