A:
Yes, the AF-S NIKKOR 50mm f/1.8G Lens will work on the D3100 Digital SLR Camera. This lens is more of a mid range all purpose type lens that is an amazing choice when shooting in lower light conditions. Keep in mind that this is a fixed lens, also known as a prime lens, so you will not be able to zoom with it. You will be able to get fairly close to your subject, but this may not be the best lens for very long range shots. If you would like a fully all purpose lens that will get both wide shots and long distance, you may want to look into the AF-S DX NIKKOR 18-300mm f/3.5-6.3G ED VR lens.