Infra Red Film comes in two varieties that I am familiar with. A Black & White Negative film (Kodak HIS) and Color Reversal film (Kodak Ektachrome EIR). I have also used a B&W infra red film from Ilford, but I am not sure if they manufacture this any more. With B&W film and a dark red filter, Green foliage is rendered in light grays and white while blue skies are rendered almost black. With Color Reversal (Slide Film) the results vary widely depending on the exposure, development process, degree of push processing, the amount of infra red reflectance present at the time of exposure and the lens filter used. There is no ISO speed rating on this film as light meters do not measure infra red. Kodak recommends a base setting of 200 and bracketing your exposures two full f-stops in both directions. My experience is that the bracketing is best done in 1/3 stop increments if your camera allows. So how does this relate to exposures being made on CCDs with digital cameras? At the moment, I am not sure I am going to investigate this and will let you know after I have researched it and done some exposure tests. Meanwhile I think the following excerpt from a Kodak publication on IR film is worth noting. A great deal of confusion exists concerning infrared photography and the measurement of infrared energy (heat waves). This confusion often leads to futile attempts to detect thermal patterns through the use of infrared photography. Contrary to what many people believe, the infrared record in a photograph is not a measure of ambient temperature variation. Thermal photography cannot be done with infrared-sensitive film because it is not a thermal or heat detector, being only sensitive to the near-infrared spectral region. (Infrared Film is sensitive to approximately 900 nm) BTW IR film is not cheap. Current prices range from $15.00 to $20.00 US currency.