Hello! I have been using a Tachihara 4x5 camera, but I am intersted in experimenting with ULF; I am considering 16x20. I would like to make a hyperfocal comera using a barrel lens such as the long component of a convertible lens. For example, with a 28 inch lens stopped down to f64 would give a hyperfocal distance of about 60 feet, so anything from 30 feet to infinity shoud be in reasonable focus. I plan on making the camera single-shot, that is, loading a single piece of paper or film in the darkroom, then shoot and develop it. Though I would only have one shot, I won't have to worry about ULF film holders and focusing with such a system.
I know that a plain achromat has field curvature much as a pinhole would. How can I tell if an old lens would benefit from creating a curved field plane? Thank you and best regards.
Mike
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