Michael: It can be pricey if you want. But as a student I cant spend lots of money for expensive equipment (I have also another hobbies

).
BW pics was taken with simple compact Olympus Fe-100. The IR version pics are taken with Panasonic FZ-18 and 720nm (colored IR) or 800nm (BW pics) IR filter. Both IR filters I bought from ebay for around £12

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AlexN: As I wrote I use that IR with Panasonic FZ-18. You can remove the IR cut filter from your Canon but it makes only one difference. Your exposure time will change from e.g. 20 seconds to 1/200 sec. But with this you can make extraordinary pics like butterflies in IR or another animals. You can also try to capture moving objects ...
Thanks for replies!
Cheeers, Roman