I've recently returned from a trip to NY for a family wedding and took around 900 shots in 8days. I'm a bit disappointed in some of them though. It's not the camera - it's me!! Check the image on the front of my website to see an image when the camera is set on a marble handrail in Grand Central Station. It's sharp from front to back an looks amazing when printed at poster size. I know that low ISO gives lower noise so i generally have my 5D set at "L", in other words "50" unless i go indoors. But i noticed when i got home that many of my shots have a touch of camera shake in them. Easily remedied by increasing the ISO and therefore reducing the exposure. Easy with hindsight. But i want to avoid this in future and wondered what you guys thought of this idea. I'm thinking that from now on i'll keep my ISO to minimum of around 200 for my handheld shots. that way i can reduce the exposure and hopefully sharpen my images. For tripod work i can then drop it down to "L" again. I've decided that a sharp noisy image is far better to a blurred "quiet" image and think that this idea is quite good. Bearing in mind the camera i have (Canon 5D) am i likely to see any noise or quality drop by using an ISO of 200 in comparison to "L"?