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Fortepan 400 Extended red sensitivity

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htmlguru4242

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In my quest to find a replacement for inexpensive IR films (SFX and, mstly IR 750), I've found that Fortepan 400 has extended red sensitivity. I know that it's not very deep red (just a touch past 720), but is it enough to give any type of an IR effect with an RM72 or a #25 filter?
 
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