Some camera bodies have an infrared sensor they use in their meters, or something like that. I think this is what fogs the film... Personaly i use one of the old nikon FM series with the meter disabled. (i use a handheld spot meter) A lot of new cameras can't be used. If you can trigger the shutter without batteries, you should be safe. (some canons won't do anything without a battery). If you shoot enough IR film, eventually you won't even need a meter. You will begin to recognize certain lighting conditions, and be able to nail it within 3 brackets. (or so I hear) As far as tutorials go, I'm currently working on re-building my website, which will feature photo goods.