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What are some special considerations when using IR Film?

April 26, 2017camera considerations Film IR olympus special

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What are some special considerations when using IR Film?

2 Answers

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Since infrared (IR) film has no anti-halation backing, light can and does pass right through it to the film pressure plate. This causes no problems when the pressure plate is flat, but the pressure plates on OM cameras are dimpled. These dimples act like little mirrors (yes, something anodized gloss black is *very* reflective in IR 🙂 to focus the light, thus giving you little spots on your negatives. Some folks report more problems with this than others. Olympus America is reputed to now stock replacement flat pressure plates in small numbers for those folks who use IR film often. The rumor is that they cost ~$70 US.

0

Posted

Since infrared (IR) film has no anti-halation backing, light can and does pass right through it to the film pressure plate. This causes no problems when the pressure plate is flat, but the pressure plates on OM cameras are dimpled. These dimples act like little mirrors (yes, something anodized gloss black is *very* reflective in IR 🙂 to focus the light, thus giving you little spots on your negatives. Some folks report more problems with this than others. Olympus America is reputed to now stock replacement flat pressure plates in small numbers for those folks who use IR film often. The rumor is that they cost ~$70 US. Thanks to GMA and others.