I have a Canon Powershot G10. I shoot aperture priority. In low light situations such as cloudy day or even indoors where there seems to be enough light in my opinion, I see the camera shake icon. My aperture is usually somewhere around 3.5. I don’t like to increase ISO beyond 200 because I will get too much noise. I seem to get the shake icon often as the shutter speed is 1/60 or slower. This got me to wondering if the T3i, 60D or 7D cameras with larger sensors than the G10 and the ability to raise the ISO higher without increasing noise have this problem at apertures of 3.5 or 4. As much as I would like to purchase a SLR, I don't want to buy one thinking that it will be better at low light and finding out otherwise. Some of the lens that I would want would be the 70-200mm f/4, 17-40mm f/4, 24-105mm f/4. So, would I still have this problem? Or would the ability to increase ISO help in low light?