I've done a few time lapses with pretty good results, nothing epic yet http://www.vimeo.com/user2201646/videos . A question that I have is how to you set your exposure up for a sunset. For example as the sun passes in front of the lens you'll need a fast shutter or closed aperture. Now as the sun goes down, I want to capture the tones in the sky/clouds without it being under exposed. Should I adjust the shutter/aperture as the sun is going down or just set it and forget it?