Yes, a Canon EOS 500D can be converted for infrared use. DIY conversion is possible, but it’s a fairly involved teardown of the camera, so it’s generally only advisable if you’re already comfortable disassembling electronics and accepting the risk of damaging the body.

From the community replies, a replacement IR filter alone was quoted at about US$180, while a professional APS-C conversion in the UK was reported at around £250. UK services mentioned were ProTech and Advanced Camera Services.

As for Canon vs Nikon: there is some truth to the concern, but it’s not a deal-breaker. One reply noted that Canon lens coatings may transmit a bit less infrared than Nikon, so some Nikon lenses can perform slightly better for IR. However, infrared performance depends heavily on the specific lens, and any lens is being used outside its normal design range in IR, so results can be unpredictable regardless of brand.

So: the 500D is still worth converting if you want an IR camera, but professional conversion is the safer route unless you have solid repair experience.