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Hi All, Thanks again for your insights. Al and Kirk made important points. We think we have solved our dilemmas thanks to suggestions from the forum, both on-forum, and off. As a result for your...

Hi Nick, The whole point is NOT to stop down to f22. At f4, one can resolve 400lp/mm, at f22, the resolving power drops to 73 lp/mm. We tried the Repromaster lens – it didn’t meet our requirements....

Hi Ralph, your questions are good and ones we had to answer. We are using roll film, specifically microfilm, because it has resolving power much higher than most available sheet film. Tech pan is the...

Thanks Will, that is new information to me. I thought Raytracing could be done both directions - to an existing lens, but I see your point. The people at Rochester Institute of Technology helped us...

Wow, thanks for the swift and expert responses. If I may respond one at a time? Yes, Steve, we are aware of the coatings for color work, but we are doing 3-color separations and focusing for each...

Thank you Will, we share your concerns. In fact, we have intended on using all you have suggested, with the added concern as to whether or not the "flat lens" truly is flat. Since we found the well...

Thank you, All, for your sage advise regarding small-format lenses in a large-format application! We chose to take your advice, and stick with large-format lenses for our imaging of the oldest known...

Hi All, I have watched this forum for many months, and I thank you all for helping us with your vast knowledge and experience. My question: Can one use small format lenses for 4X5 photography? I...