MikePhotoFiddler wrote:
How can you tell if the lenses are auto focus? I have a nikon d3100 with the kit lens 18-55 dx 3.5-5.6. The other lenses I have are a nikon 55-200 dx 4-5.6 and a nikon 50 dx 1.4. I bought some manual lenses but I think I would rather buy more of the auto lenses instead of the manual ones. Any suggestions on a other brand would be great as well. I am in the process of receiving a d7100 body only and would keep the two cameras ready to shoot. I am looking for just one more lens ( 28-300 maybe ).
Afs means auto focus.. also newer afs will have SWM which means silent wave motor. Tamron makes a 12-24 (which I have) that is about $500 less than Nikon's 12-24 but it fish-eyes a little at 12mm where the Nikon does not. Also the Nikon is a little sharper. Both are DX lenses meaning that they are designed for cropped cameras like the D7100 rather than full frame. Nikon, Tamron, Olympus, Sigma all make good to great lenses for Nikon.. I am probably leaving someone out. I would probably stay away from Vivitar, Fuji, and some of those.