I used to do a bit of landscape photography a few years ago but have since forgotten just about everything to do with photography. I am now taking a few photos of models, which are often in low lighting conditions and the result is that my photos are very grainy. With the flash on and in automatic mode the photos look stark with deep dark shadows. Using manual settings and with the flash off the photos are golden, grainy and often out of focus. Any help would be greatly appreciated.