>I have an SB 900 and a D7000 and my flash pictures started >out pretty good but recently my bounce flash picture have been >exposed pretty inconsistently. When I reread the SB 900 manual >on page D-27 I noticed it says the camera must be in A or M >modes and I had started using S mode. Sure enough that seems >to have been my problem but I was wondering if anyone had any >ideas why the S mode is a problem. I'm just trying to >understand a little bit more how everything works and was >curious about this.
Another thing to watch out for when shooting indoors is to make sure you are using regular TTL and NOT TTL-BL. TTL-BL is for balancing the flash with bright ambient conditions. Regular TTL will fully expose the subject, which is what you want indoors.