Originally Posted by
Drew Wiley
An ortho film is an ortho film, period. With a pan film you've already got an ortho film too, if you use the correct filter, or a blue-sensitive film, or a red-sensitive, or anything in between. If you like Ortho film, that's great. But using a 25 version for sake of extremely fine grain wouldn't seem to be an ordinary priority in large format work, esp since it might require long exposures in potentially windy conditions. Been there, done that. And believe me, AA often had a lot of trouble getting texture on ice. Pyro makes it quite a bit easier. If you want a kind of compromise film for a more naturalistic look of foliage in the mountains, it would be an orthopanchromatic film, which has reduced red sensitivity, but still some. Sadly, both Efke 25 orthopan and Fuji ACROS orthopan have been discontinued, though it's still possible to acquire roll film of the latter. I still have some sheet film hoarded in the freezer.
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