Hi- I'm newer to this forum, and a newbie to using anything but the "auto" settings on my camera, but I'm learning a lot of good info on here. Currently, I use a 50mm f/1.8 on my Canon XTi, since most of the photos I take are of my two young children. I like the results, but I'm finding I'm not getting a nice blurred background (when I can get a shot of them sitting still for a few minutes). After looking at the photos my sister took, using her Nikon D40 with her 50mm f/1.8, I was sort of disappointed at the way my photos were turning out. (We did a comparison, same camera settings, lens, subject, etc.) We were both thinking it's because her lens has f-stops (?) and mine doesn't. Her photos had a nice blurred background, mine didn't. Also her photos had a nice glow to them. (but I think my flash kept popping up even though it wasn't needed, and she was just getting nice natural light). Also, I'm on lens #3, since the one I have is a little more cheaply made, and I've had two just literally fall apart on me. So my question finally...I'm thinking of upgrading to new lens. I was thinking about the 85mm f/1.8, but since my camera is not a full-frame one, will this work? The lens is in my price range, and I'd like to stay around that amount if there is another lens I should consider. Or would the 50mm f/1.4 be a better option and more versatile? (My sister was trying to talk me into buying Nikon D40, and selling my stuff, but I don't know if I'm ready to do that quite yet. I think mine has a few more megapixels, however, I read that megapixels don't really matter. Thanks! Now I'm off to reading some more threads.