Hey all, I recently purchased my first DSLR (T2i), and had a question about taking 1080p video. The SD card that I have on hand is a Class 4 16GB MicroSD with an SD adapter. My question is - is this card too slow for taking reliable 1080p video? I have heard rumblings that I would want to use at least a Class 6 card or higher, and preferably a Class 10 for the best results. My impression is that general quality will increase as the Class of the card increases. Is this a correct assumption? If so, will 1080p video taken on a Class 4 card simply be unusable? Does anyone have experience with this? I plan on doing some testing after work, but any advice from this community would be very helpful. Thanks!