Possible Duplicate: Why does my Canon DSLR stop recording video automatically? When I try to shoot video on my 550D with an 8GB memory card it will only film for a few seconds and then ...
Possible Duplicate: Does every frame of video (or live view) on a DSLR count as a shutter actuation? I am concerned about the amount of actuation used when taking a video on my Canon EOS ...
I have a Canon550D, and I would like to shoot a movie using an external microphone. Can I use a phantom alimentation-required microphone on it?