ntenny
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Ortho film and ortho *litho* film are two different critters. The litho stuff is what's used for duplication and sometimes for special effects, but just plain "ortho" films like the Adox ORT25 are much less extreme. They run to quite high contrast, but in a compensating developer that can be a virtue (or they can be tamed with a low-contrast developer); and they can be *extremely* fine-grained. My impression is that red sensitisation intrinsically raises the grain size.
Generally the wisdom is that you *must* shoot them with a yellow filter when outdoors, or the blue sky will blow out. However, I've cheated a few times, when the sky wasn't extremely bright, and gotten away with it.
I like the Adox ortho film quite a lot, mostly in Diafine. I'd guess the Efke ortho film is the same emulsion, but I'm not sure.
(Addendum: I know Keith knows this, but the comment about "large format on the cheap" made me think that post was referring mainly to ortho litho film, and I wanted to clarify the difference for the original poster.)
-NT
Generally the wisdom is that you *must* shoot them with a yellow filter when outdoors, or the blue sky will blow out. However, I've cheated a few times, when the sky wasn't extremely bright, and gotten away with it.
I like the Adox ortho film quite a lot, mostly in Diafine. I'd guess the Efke ortho film is the same emulsion, but I'm not sure.
(Addendum: I know Keith knows this, but the comment about "large format on the cheap" made me think that post was referring mainly to ortho litho film, and I wanted to clarify the difference for the original poster.)
-NT
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