The Hyper-Sonic Motor (HSM) not only makes the autofocus practically silent but it also means that Nikon D-SLRs without built-in motors can still use autofocus mode.

Yes, I would recommend this to a friend

Easily Interchangeable; Fast / accurate auto-focus; Great effects; Lightweight

Although I have all Canon lenses and mostly L glass, I am over the top with this little gem. I love this Sigma 10mm! On my 1.6 body it will give me 162 degree angle of view. There is a filter in the rear of the lens which is very nice for adding ND filters when shooting slowmo water.

Very sharp; Will it distort? Hello! This is a Fisheye review

Cap lining is wearing out; :

very nice wide effect.. a very good fisheye.. was wondering if i would buy a canon 15mm fisheye.. but chose sigma 10mm fisheye and was very pleased with the results.

Consistent Output; Durable; Quick Focus; Sharp Focus

an alternate view of the world, warning this lens is addictive both my son and i have been sharing this lens to great effect buy it if you want to have a good lens for the money well made like most sigma lenses and comes with a decent pouch and lens hood and you want a diagonal fisheye view of...

I bought this lens for a STEAL of a price through Amazon's Warehouse Deals. I've never bought anything used from them before, so I was a bit skeptical and I was worried that the condition of the lens might be bad. Was I wrong! This lens only cost me a fraction of a new lens...

Excellent lens, the macro effects are outstanding, this is what I was looking for in a micro lens. I prefer to use MF on macro photography as it gives me more control of the background.

Compared Nikon lens and Sigma. After evaluation came up to a conclusion that Sigma is better on my D3. Took great photos of night Manhattan.

This was a gift for my son's 25th birthday, he is a skater, surfer, snowboarder, He love's this lens. I is great for the Skate Barn photo's. I would recommend it!

Easily Interchangeable; Fast / accurate auto-focus; Lightweight

everything is good!