A most interesting lens. A 10mm fisheye lens with a full 180 degree field of view would be interesting by itself. However, this is the first fisheye zoom, with range to 17mm at which point it has a less fishy 100 degree field of view. Aperture is f/3.5-4.5.
Please note: This lens does not have a built-in autofocus motor. Therefore, it is not fully compatible with Nikon DSLRs such as the Nikon D40, D60, D3100, D5100, etc.