I am shooting now with a D60 and want to add a 1.4x teleconverter. I bought a Nikon brand 1.4x on Ebay and it says there is no lens attached? Does the D60 lack a motor that allows it to work properly? I'm a little lost... I am looking to buy a D90 also. Is there a 1.4x or a 2x teleconverter that will work the same on both? I have a 70-200-F/2 and a 50-500-F/4 that I shoot sports with. I know I add 1 to the F stop, so is it even worth it to add it to the arsenal? Any opinions? Thanks!