Instruction: Answer the given question using the supporting document.

Input:
Question: Will this work with a Nikon D40x?
Document: Awesome Lens! work perfectly with my nikon d5000 and is a very usefull lense to take pictures of your work
I have two of them one for my canon 7 d and one for my a77 sony very rectilinear sharp gives a very different dimension to my work
However, every Sigma lens I've owned, including this one, has had some sort of mechanical/electrical failure. In this case, the autofocus copped out within weeks of my receiving the lens. It's not too big a deal, because I mostly manual focus anyway, but it's an annoyance. I haven't had time to send the lens in for warranty work yet,but will shortly.
This is my first lens over 250 bucks, and this lens is worth every penny. It takes getting used to, like any other lens, but the results of your work can have a variety like non other. I researched for a while on which super wide angle I was going to get, and having the capability to emphasize perspective distortion at the 8mm focal point is as unique as you can get. Plus the results all around are amazing.
if you're willing to work at your composition, don't need a really fast lens and REALLY need the widest lens without going fisheye, then yes, you buy it. it's a very nice piece of equipment. but if you don't really NEED 8mm - if you can live with 10mm or 11mm, if you are short on cash, if you need a fast lens or you're positive you're gonna smack the front of this baby against a rock on day one - then consider the other sigma and tokina alternatives.
Purchased this lens for my Sony A77. It works great - quick auto focus and captures lots of details even at 8mm. It gets really good pictures during sunny days (outdoor) but need extra work/post-processing when cloudy. Also, you will need photo editing software to correct the distortion when using this lens (tilting the camera/lens even slightly up or down will cause distortion).
I have a Nikon D-7000 and wanted to know if this Sigma 8-16 zoom lens will fit my camera?Mike
Lens has performed as expected and works great with DX camera, Nikon D7100. Opens new world of photography, especially landscape photography!
Very nice lens, too bad it was a Canon lens shipped in a Nikon box, with serial numbers not matching the warranty registration form numbers.Looking forward to receiving the correct item.
This Sigma is exactly what I was looking for as far as wide angle, and specifically for APS-C sized camera. I own a Nikon D5200, and it is on my camera most of the time! If your looking for a great lens, imo, this is it. Happy shooting!
Answer: The lens has a built in AF motor, so it should. Double check with Sigma to be sure.   BTW, I usually focus with the distance scale for low light indoor stationary subjects.  I mainly photograph real estate interiors, and find this works better than AF, especially with a DOF table.