At the advice of several friends who are very familiar with photography, I went to the camera store to buy a Nikkor 50mm f/1.8 lens. It fit my budget, and according to a good friend, my needs: portraits, FAST shooting and does well in non-optimal lighting. The store was out of stock of the 50mm, but the salesman there told me about another lens, the Nikkor 35mm f/1.8g. He explained that the only minor difference I might notice, especially starting out at this level, is that it is a slightly wider lens. I decided to try it, knowing that anything too wide, I could just crop out... easy right? Well it's been a week of using this lens, and I am finding that I sometimes have a hard time with getting fast, crisp images. I shoot mainly on Aperture priority mode, or "P" mode and try to avoid the flash. I often have plenty of light, even indoors. But my photos still come out blurry. Here is an example, I feel like I missed a wonderful photo! Yes, he was running, but the whole reason I wanted to get into DSLR photography is because of its speed and clarity. Now there are a few reasons I'm sure that this happened/happens: 1) I am extremely inexperienced. I am getting to know my camera via practice, and reading slowly through a couple books. Maybe I just didn't have it on all the correct settings at the right time. So maybe this will just improve with time. 2) Is the 35mm lens that noticeably different from the 50mm? I know a lot of people rave about the 50. Do you think I should go exchange the lens? The salesman did offer me the option of doing that after trying out the 35mm. Would I really notice a difference, with as little experience that I have? Really, I'm looking for personal preferences and experiences. I want to and will improve, but if the big difference is in the lens, then I want to exhange it now while I have the opportunity and the lens is still in pristine condition! If this needs to go in the product discussion forum, I understand, but I tried a search on 35mm vs. 50mm and found nothing.