I'm going to the local city zoo with my camera. This will be the first time I'm going to be doing serious photography with animals. Does anyone have advice on how I could do animal photography? The biggest problems I'm having is lighting. Whenever I did animal photos in the past, I'd always get terrible contrast, even on digital. For example, there would be bright light all over the photo, but splotches of dark shadows all over the animal. Should I try to photograph only under overcast conditions?