Ken Rockwell has written a simple tutorial on how he uses and sets up his Nikon D50, a 6.1 effective megapixel Nikon DSLR camera with DX Format CCD sensor, a large 2.0-inch LCD inch screen, a refined 5-area auto focus system, continuous 2.5 frames per second frame-rate, and Nikon’s 3D Color Matrix Metering II.
“ISO: I use 200. If the light gets dim and my images would get blurry from slower shutter speeds I increase the ISO to 400, 800 or 1,600. I never bother with in-between settings like 250 or 640. The D50 looks fine at ISO 1,600 if you need it. I’d much rather have a slightly grainy but sharp image than a less grainy but blurry one. Unlike film, the D50 looks great at high ISOs, so I use them anytime I need them.”