I have a 28mm f2.8D AF lens on my nikon as my all purpose lens. I find it is pretty good for most of my photography [I can move in most of the time] and the only occasional problem is the lack of out of focus areas. I'm considering buying a 50mm lens, but I don't really have a big budget for photography right now [its either the 50mm or the SB-600] What can't I do with the 28 that I can with the 50, and what do you think of my choice currently of 28 as a standard lens. I want to get documentary style shots and I think a 28 is good for that. I just have to remember to include the surroundings.