Is Nikon D40x and Canon EF-S 18-135mm f/3,5-5,6 IS compatible?

Below you will find your chosen camera and lens. Click on the product name for more information.

Buy	Nikon D40x Released: 2007 Type: Digital SLR Sensor: DX / APS-C (1.5x) 10 Megapixels 3872 x 2592 pixels
Buy	Canon EF-S 18-135mm f/3,5-5,6 IS Released: 2009 Normal Lens (zoom) Suited for cameras with APS-C sensors Focal Length: 18-135 mm Aperture: f/3,5-5,6

Can you combine these two?

This is the short answer:

No! This combination is not compatible

The camera and lens you have chosen cannot be combined. Here is a longer answer:

A non-Nikon lens on a Nikon camera

This is a Canon lens and unfortunately they are not constructed to work with Nikon cameras. If the lens would have been a Sigma, Tamron och Tokina it would perhaps be different since they are available with a compatible Nikon mount.