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35mm

Public Group active 2 weeks ago

Discuss film, exposure, black and white, color, equipment or anything else pertaining to film photography with 35mm cameras.

InfraRed photography-technicalities (2 posts)

  • Profile picture of furfix furfix said 3 months, 3 weeks ago:

    Hi, can anyone help me with infrared? I have a 120 and 35mm infrared film ready to be loaded and taken to a shoot. I have a Kodak Wratten 29 infrared filter but there is quite a bit I dont know and am asking for some info. I dont know what ISO to set it at. Also I dont know how to expose it. I know to focus it first then attach the red filter but what then? I have a light meter and the books say to use it but that doesnt make any sense to me. The filter is opaque. Surely there must be some sort of exposure compensation factor that needs to be considered? The film I know is sensitive to visible spectrum as well as infrared, so that must surely mean the exposure has to be long enough to account for the opacity of the filter? Yes?

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  • Profile picture of Maris Maris said 3 months, 3 weeks ago:

    Which film are you shooting? What subject matter? What camera and lens? A Kodak Wratten #29 is not a infrared filter. You need Wratten series 89, 88, or 87 to shoot infrared depending on the spectral range you want to record. Most people avoid Wratten gels these days and use filters like IR680, IR720, … and so on. I shoot several hundred infrared negatives a year and the results are still somewhat unpredictable. That’s part of the fun!

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