Dr Croubie
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So in my quest to be a total tightarse, I'm looking at getting some Xray film in 8x10 to try out and practise (and also do things like verify light-tightness), before I drop the big cash on Delta100/FP4/HP5 (which is probably where I'll stop, colour in 4x5 is bad enough, I doubt I'll ever afford it in 8x10).
Anyway, as part of my research into what film to buy, I came across the Fujifilm datasheet on their HR-T30, which includes an MTF curve:
The numbers certainly don't look promising, the graph only goes up to 5 LP/mm. Compare that to Velvia, you're getting 50% at 50 cycles (which is lines or line-pairs? Either way, it's way better):
So I know comparing X-ray film to Velvia is rather unfair, and development method will have an effect (I plan Rodinal stand). But still, getting not much more than 50% at 1LP/mm isn't my definition of sharp. Certainly useful for pinhole no doubt, but is it anywhere near useful for regular-lenses?
Or do I have something totally wrong?
Anyway, as part of my research into what film to buy, I came across the Fujifilm datasheet on their HR-T30, which includes an MTF curve:
The numbers certainly don't look promising, the graph only goes up to 5 LP/mm. Compare that to Velvia, you're getting 50% at 50 cycles (which is lines or line-pairs? Either way, it's way better):
So I know comparing X-ray film to Velvia is rather unfair, and development method will have an effect (I plan Rodinal stand). But still, getting not much more than 50% at 1LP/mm isn't my definition of sharp. Certainly useful for pinhole no doubt, but is it anywhere near useful for regular-lenses?
Or do I have something totally wrong?
Good. "a minor thing". I hope so. I already know I'm going to die of cancer. I don't go to doctors other than the urologist for prostatitis (not cancer). He's just my Cipro connection. Why would I want to go to a doctor and be told what I could have told him, when the time comes? I don't wanna know. It won't change anything. GL.
