I purchased this card for my new Canon 550D. Please do your research before purchasing this memory card as well as others. Primarily I wanted this Transcend card for video purposes, but my DSLR would cut on & off from video recording. It turns out the reason my DSLR would cut off was because the "Class 4" Transcend card that I just purchased, was for an older series DSLR. I should have payed attention to that because I should have purchased a "Class 10" Transcend card. This card works ok for my camera, but I eventually just ended up using this card inside my Nintendo Wii.