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Anonymous
ir film newbie here--

is ir film sensitive to visible and still require a visible filter?

can you meter based off visible light?

problems with focusing ir?

what about development of ir film?
>> Anonymous
>>112654is ir film sensitive to visible and still require a visible filter?
Yes, it is sensitive to visible light. The filter is up to you. The darker the filter, the more pronounced the IR effect will be. With no filter, it will look similar to normal B&W film but with more grain and a bit different balance. With a red 25 or 29 filter, the IR effect becomes fairly pronounced but you can still meter and focus through the filter. The effect is most pronounced with a true IR filter, but you won't be able to meter or focus through the viewfinder.

>>112654can you meter based off visible light?
Yes, but it will be incorrect. The best thing to do is meter based on visible light, then bracket 1.5-2 stops on either side.

>>112654problems with focusing ir?
The point of focus will be slightly different in IR than in visible light. Some lenses have correction marks, or just stop down.

>>112654what about development of ir film?
Google it for your film/developer combinations and times. Nothing particularly special other than loading and unloading the cartridge from the camera needs to be done in complete darkness. As with panchromatic black and white films, you can't use a safelight with IR.

If you have it processed at a lab, be sure to tell them that it's IR film and what ISO you exposed it for.
>> Anonymous
>>112657

thx