> >>I think one of us is confused...? could be me... >> >>But you can't get the FOV of an 8mm out of 10mm lens. > >The image the lens projects is quite a bit larger than the DX >format outlined on an FX sensor. Shoot in FX mode, and I can >crop a wider FOV than what the camera would shooting in DX >mode. > I would have to agree that you can't get 8mm out of a 10mm lens. If there was 100% coverage on your fx you would get 10mm. This lens was made to work on DX and gives an FX (35mm) equivalent of 15mm-36 mm on a DX camera. Getting 10mm on an fx camera is amazing and I will have to try it since I have this lens too. Sorry I feel like I strayed way away from the question. In general if you are shooting with this camera I don't think there is a benefit to shooting in DX mode. You lose pixels and I believe you will have similar or less IQ than the D300. The D800 in crop mode may be slightly better than the d300. The pixel count will be slightly higher.
"Cameras and lenses are simply tools to place our unique vision on film. Concentrate on equipment and you'll take technically good photographs. Concentrate on seeing the light's magic colors and your images will stir the soul." Jack Dykinga