If you read your Canon EOS manual, it will tell you that Infrared film is not to be used in this camera.
This is not because the film will harm the camera in anyway. In fact, I can’t think of a situation where film could harm a camera. (Under normal conditions of course. If you wanted to take a piece of film and use it to scratch a lens, yes, it could harm the camera. Don’t Do this! )
Canon does this mainly because the film advance feature in your camera uses an infrared beam in order to assist advancement of the film. This infrared beam is always on, and since infrared film is sensitive to the infrared spectrum (duh ! ), the beam is capable of, and does fog the film.
Canon, however, is a little less tolerant than you or I might be. If you know about the problem before you shoot, you can compensate for the problem.
In most cameras, most of the ones that I have dealt with anyway, the film is loaded upside down. Why this is significant, is because the film advance infrared beam is at the top right of the film chamber. What this means, is that the bottom of your film is going to be affected.
How much of the frame will be fogged depends on how fast you shoot your film. Because that infrared beam is always on, the longer it takes to shoot the film, the more of it that will be fogged. Either the bottom of the frame and sprockets will be fogged or as far as 2/3s of the frame will be fogged.
Don’t let all this discourage you however, there are contact prints on the net of slightly fogged sprockets and only slightly into the picture. If you gauge for this by framing your image slightly higher in the frame than you normally would, knowing that you will likely have to crop the bottom, you can still come up with some beautiful pictures.
For examples of this, please refer to the following links:
A few things to keep in mind for shooting Infrared film is that it is more finicky than your average film. You can damage it with the heat of your hands, so handle it as little as possible. If you are going to shoot it, keep it very cool, and dark til you load it, load it in the dark, (darkbag is excellent for this) and make sure you use the film all in one shot and fairly quickly. Then, get it into something cool again, get it processed as soon as possible, and make sure the lab knows what it is. Some photographers tape the top of the plastic container, just to give the lab technician pause to look at it before they potentially destroy the film.
This should get you started. Please! Post and tell me how you made out with it.