Hi all,
Thanks very much for your replies--a lot to think about . I've seen some information that talks about optimising pinholes for a particular focal length and also some different information that talks about optimising pinholes for the pinhole-to-subject distance, which is why I was asking real people with real experience if it is possible, or rather perhaps scientifically meaningful, to optimise a pinhole for a particular distance (either as a stand-alone question or in addition to being optimised for a focal length). Light will of course be an issue, but my plan is to bring along a sketch pad and pencils, or a good book, or some music to practice, to pass the time during hour-long exposures .
In the meantime, thank you for links to websites and calculators, and I have a plan brewing to see if I can do some experimentation digitally.
Thanks again,
Sharon
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