I just replied to a post concerning which lense to use for video. I answered the question forgeting she mentioned the video part. All my cameras shoot video allthough I've never used them for that reason. I baught the cameras for photography not video. My question is, does the speed of a lense affect shooting video as it does photography. If choosing to open up the lense, do you still get the shallow depth of feild as with photography? Just curious. Never thought about it before.