Hey all, Total noob here and I have a question about two Nikon lenses. I currently have a D90 with an 18-105 f3.5-5.6 that came with the camera and am looking at getting another lense. There are two that I'm looking at and want to know what the advantages each will provide and also the downside. Nikon AF-S 35mm DX Nikkor F/1.8G Nikon AF-S 50mm Nikkor F/1.4G The reason I'm looking at thes two is because I'm looking for a lense that isnt a zoom lense, and will capture better images in low light and because of the lower fstop in these lenses, they will do better than my 18-105. If someone could enlighten me on the advantages / disadvantages of these two lenses, I would me most greatfull!