I'm planning on shooting a few time lapse sessions when the weather clears up of the stars out here in Alberta. How long on average can i expect my T3i / 600D to snap exposures of around 20's, ISO 1600 for? Any tips on extending the battery life? Or any tips on timelapse in general?
I've done 1 timelapse movie before with my sx40 but that was during the day so i didn't really have to worry about the "flickering'' too much. Thanks!
Damo

