So my D40, 55-200mm, and SB-600 combination failed. I tried out the Pentax ME-Super, 80-200mm f/4 and 1600iso film which came out acceptable. I was shooting at 1/125 and there was motion blur, but not too much. I was thinking that if I use my D40, and my 17-50 f/2.8 that would be much better? Or I could possibly use my 90mm f/2.8? What do you guys think? I would really like to stay away from using a flash.