Mounted on a D1, this is all you see. Meanwhile, read the full review here . Neither is the user. Images captured by D1X are noticeably less sharp and colour fringing is quite evident towards the corners of the frame and around high contrast features, even in the image centre. I suspect its optical design was optimised for the D1, and that the loss of sharpness on D1X might be caused by frequency aliasing of fine detail.
Images are very sharp in the centre but sharpness diminishes rapidly towards the corners.
Colour fringing together with residual coma and spherical aberration can be troublesome in the corners of the image, too, and largely due to the enormous bulbous front element, flare and ghosting is a challenging issue during practical shooting. High-lights clearly show visible fringing. I briefly tested this lens and didn't like it at all. This handy wide-angle lens gives a 100 angle of view and is built quite compact. It gives sharp and contrasty images thanks to its modern optical formula, but flare and ghosts are easily produced under adverse light conditions.