After reading a number of views regarding a DX lens on a FX camera I decided to try mine. Received a D700 July 30 & all is well. Today I put on a 20mm 2.8 Nikkor to check field of view. Replaced the 20 w/12-24 Tokina. Yep vignettes bad at 12mm up thru 15. From 15 or 16mm thru 24 it is perfectly useful. No DX switching at all. Now the 12-24 was a real 18-36 on the DX camera so I feel like I lost nothing with the WA DX lens.