NIKON D80; Nikon 18- 135 G LENS, Camera doesn not recognise lens

The sensor on the D80 is smaller than a piece of 35mm film. This means the camera will only use the center portion of the image cast by the lens. This reduces the angle of view, effectively increasing the focal length. The 35-70mm will give you an angle of view similar to a 52-105mm lens on a film camera. Likewise the 70-210mm lens will give you an angle of view similar to a 105-315mm lens.

The D80 doesn't have video capabilities. Nikon introduced video capabilities with the subsequent D90.

Sorry if that wasn't the answer you wanted to see, but that's the way this camera is.

try another lens.

The 650-1300 lens does not have the electronics to communicate with the camera. You have to use it in the Manual exposure mode, without any help from the camera's light meter.

The D80 doesn't have the LiveView capability, which lets you use the LDC monitor instead of the viewfinder for framing your pictures. This has nothing to do with the lens. Nikon introduced this capability with the D3 and D300, which came out after the D80.

set the autofocus swith in the camera beside the lens to AF, and in the lens switch to AF

All after market lenses are specifically designed for a brand of camera. They are for Nikon, Cannon, Minolta etc.. They can not be cross branded just as you could not use a Nikon made lens on a Pentax.

Having gone over a month with no response, I assume this is no longer a problem.

The 50 mm lens is a full frame lens, and the D80 is a DX camera. This means that the 50mm lens puts an image out that is bigger than what the D80 can "see". The good part of this is that the D80 (and most of the other Nikon DSLR's) use only the image from the center part of an older lens. The bad part is that if you put the fisheye filter on it, the fisheye effect that is mostly seen at the edges of the lens doesn't show up on the D80 sensor. If you could put the fisheye filter on a DX lens, it would give you the full effect.

problem is in lens censer replace it

The "fEE" error indicates that the camera is not communicating with the lens. The lens may not be attached to the camera properly, or if it has an aperture ring, it may not be set to f22 (or the highest aperture number of the lens) - which is normally marked in orange. Select this aperture and lock it using the aperture locking switch to prevent this from occuring again.