A co-worker with more photography experience than myself suggested not using the flash - she said that natural light produces more realistic, warmer images. The problem I'm having, is that in low-light situations, the flash on my digital SLR pops up automatically - and when I switch to manual mode (or P mode on a Nikon D80), the images either don't come out because a) there is not enough light -- they come out pitch black or b) they're not as focused. Any suggestions on how to produce high quality images without a flash? What do pro photographers do to get a high quality image (ie: realistic and not flat) when using flash?