Hi all I've bought a Canon 1000D, and was playing around with the settings. I was taking pictures of a person standing against a white wall. I then noticed that there was a difference in exposure of the wall between full automatic mode, and manual (M) mode. With full auto, the wall was exposed 100% on both sides of the person. With manual mode, the side which received some light from a window was correctly exposed but the wall on the other side was noticeably darker (not really underexposed, but still, there is a definite difference). It is strange to me because the settings for both shots were identical: lens used was the Canon 17-85mm IS (same focal length for both shots), ISO 400, 1/60 and f5.0. External flash was used, Canon 430EX MkII, 60 degree head tilt, flash bounced off the ceiling. Flash was on full auto mode for both shots. The person was correctly exposed in full auto mode, but also darker in manual mode. So why is there a difference in exposure on the one side of the wall? I'm very curious to learn about issues like these so any input would be appreciated!