>I'm shopping around for a Prime lens for my D3000, and I'm >wondering if anyone has a lens to recommend? This lens is the >one i'd like to buy, based on the raving reviews about it and >it's low pricetag, but I can't get a straight answer on >whether or not AF will work on the D3000. > >http://www.amazon.com/Nikon-50mm-Nikkor-Digital-Cameras/dp/B00005LEN4
The Nikkor AF 50mm f/1.8D will not AF on your D3000 body. It will support metering and all exposure modes but you will have to use Manual Focus.
The Nikkor 50mm f/1.4G AF-S is available and will supprt all functions on your D3000 including AF, though it is priced in the $450.00 range.
The 35mm f/1.8G AF-S has a Silent Wave Focusing motor built into the lens and will work perfectly on your D3000, supporting all functions including AF. The 35mm f/1.8G AF-S is very well regarded by most Nikonians that have used the lens.
What sports will you be shooting?
A 35mm lens on a DX body like your D3000 can be described as a normal lens providing the same Field of View (FOV) as a 52.5mm lens on a film body. Depending on the sport that you will be shooting it may or may not be long enough for your needs. You can test this by setting the zoom ring on your kit lens to 35mm and see if the FOV is adequate for your needs. Good Luck and Enjoy your Nikons!