I am new to SLR photography, and was trying to figure out the Av setting on my camera. I bought the field manual and was reading that you can change the aperture to make the background blurred or in focus. Well I tried this Av mode just now with a big styrofoam cup on my desk and my speaker about 3 feet behind it. First of all, I could never get the speaker to be in focus at all, no matter what Aperture I set. Secondly, every shot I took turned out blurry, because the shutter speed was slow in this Av mode and I couldn't hold the camera still. I tried using the flash, increasing the ISO, everything. But I keep ending up with shots where everything is blurry, even the main subject. What gives? In auto mode I always get clear pics. Are the manual modes really the way to go?