Nikon D40x I would like to now if nikon D40x work with Tamron SP AF 11-18mm

http://www.tamron-usa.com/assets/pdfs/272E.pdf
This is the manual for the Tamron SP AF 90mm
F/2.8 Di Macro 1:1 (Model 272E)

Hi Missy - certain Nikon bodies lack the built in auto focus motor as a way to hold costs down and make them affordable. The problem is that any lens purchased for these bodies will need to include the motor - and adds the expense to the lens. Instead of paying for the motor once in the body, the owner will need to buy it in every lens purchased for that body. As of this writing, the Nikon bodies that lack an AF motor are: D5100, D5000, D3100, D3000, D60, D40X, D40.

When selecting a lens for one of the cameras listed above, you must choose the model for a Nikon that needs the AF motor built into the lens. Tamron sells lenses for these camera bodies and states they have "BIM" or "built in AF motor" and similar. In any case, regardless of lens manufacturer, you must purchases lenses that have the AF motor built into the lens, otherwise it will not be able to auto focus. Here is a site with a list of all lenses known to to have the AF motor built into the lens.

I hope this helps & good luck!

This lens is compatible with your Nikon D90 according to this site:

http://lenshero.com/lens/Tamron-14mm-f2.8-IF-Nikon-f-lens

Your complaint "does not work" is rather broad, so I don't know what specific kind of problem(s) your having with it.

If you continue to have issues with it, make sure other lenses work on your D90 to eliminate the body as the source of the problem. Consider performing a 2 button reset on the D90 (and resetting any other customized settings to defaults) and try again. If it still "doesn't work" then contact Tamron to evaluate the lens for possible repair.

Good luck!

Tamron makes lenses with a variety of mounts. Assuming the lens has a Nikon mount, then it is fully compatible with the D200.

Try cleaning the lens and camera contacts gently with a lint-free cloth

Assuming the lens has a Nikon mount, yes.

The D40x only autofocuses with the latest AF-S (and old professional AF-I) lenses. Most traditional (screw-type) AF lenses from 1986 through today will not autofocus on the D40x. If your lens says "AF-S," you're fine.
Most lenses sold today for the D40x are AF-S, and so is the included 18-55mm kit lens. Many non-Nikon lenses from Tamron, Tokina, Quantaray, Sigma and anyone other than Nikon still won't autofocus on the D40x. Try before you buy, but honestly, there isn't much the included 18-55mm lens won't do.
Autofocus systems are fast, but not usually instantaneous. You have to hold the shutter down halfway as you compose the first shot so the AF system can focus and lock, and then the camera fires instantaneously when you press the shutter the rest of the way. See Preventing Shutter Delay for more.

That lens doesn't have an internal focusing motor and thus will not autofocus with the D40x. Nothing is broken.

I had the same problem. My issue was with all my lenses. I solved it by going to the menu and selecting the custom setting menu (pencil icon). Then from the right menu select the AE-L/AF-L and press OK. Then make sure it is set on AE/AF Lock. Presto...all my lenses worked on auto-focus.

Your question is posted under a Nikon version of this lens. I assume you are talking about using the Canon EOS mount version.

The short answer is: Yes