Hi Alice, For all around I think aso 400 works well. However I do use a slower speed myself. The grain is much better and I shoot off a tripod making all those greats shots that I take just as good on paper. 50 or 100 is slow but the detail is much better as well as color if your using color film but a tripod is a must when shooting in low light and when using zoom or telephoto lens. Good luck. Guy