I have a T2i with the 18-135 IS and 50 f1.8. I shoot alot of pics outdoors and on sunny days. It seems no matter what I do as far as shutter speed, aperture, iso sometimes I cant avoid overexposure. I usually use evaluative metering. If I set my exposure on the background my subject is underexposed and if I set it on my subject my background sky will get blown out. Is there anything to do to avoid this problem. should I just make sure my subject is properly exposed and dont worry about the background.