What I have: Nikon N90s with 35-70mm lens and SB-22 speedlight. I plan in the next couple of months to get the D50. I am undecided on what lens I should get. I was looking at lenses in the 19-35mm and 70-300mm range, and that they would work with both camera bodies. I do understand that the G type lenses will be limited on the N90s, but am only going to use that as a backup once I get the D50. I do a lot of nature and landscape phorography, so I don't know which size I should get first? Ultimately I will have to decide, but I would not mind some suggestions from the forum members. I do have tight budget considerations, so I would like to keep the price under $300 for each lens. First, which should I get, the wide or the telezoom? Second, on a budget, which brand? I have been looking at Nikon, Sigma and Tamron glass. Thank you.