Greetings. I'm shooting Fuji FP-100C (color instant) film in a pinhole camera I made, and not surprisingly I need very long exposures. according to the Fuji datasheet for the film, I should use 7.5Y and 12.5R color correction filters for exposures over 10 seconds, but I can't seem to find anything like this online. Can't find shoot through filters for cameras or just gels for lights. I actually have some Roscoe ColorCal gels for lights/strobes, but theyre all in increments of 15, 30, 60 etc which won't work obviously. Can anyone tell me where to get the filters I need? I'm willing to try lighting gels in front of my "lens" just to see how badly they affect image quality compared to actual shoot-through filters.