I have a Nikon D50 with the standard lens included, and am looking into a cheap telefoto lense to go to about 300mm. I've been looking up lenses on the web for the past few days and reading many reviews on these two lenses: The Sigma 70-300mm f/4-5.6 APO DG ($180-200) The Nikon AF Zoom-Nikkor 70-300mm f/4-5.6G ($120-150) No reviews I have found compare the two. They both seem to have the same short-comings. One, however, is more money, and is suprisingly the Sigma, not the Nikon. Which would you recommend I buy? And, if you recommend the Sigma, would you tell me I should definitely go for the APO or should I save a bit and just get the regular DG because it doesn't matter that much any way? Thanks for the help!