Sigma 15-30mm f/3.5-4.5 EX DG IF Aspherical Ultra Wide Angle Zoom Lens for Nikon SLR Cameras

Sigma 15-30mm f/3.5-4.5 EX DG IF Aspherical Ultra Wide Angle Zoom Lens for Nikon SLR Cameras
From SIGMA

Sigma Photo introduces the Sigma 15-30mm f3.5-4.5 EX Aspherical DG DF for Nikon SLR cameras and is the first to open a new range of photographic possibilities. Using a hybrid aspherical lens in the front lens group to minimize distortion and astigmatism, and molded glass aspherical lens in the rear lens group to minimize spherical aberration, ultra-wide-angle photos appear more natural than ever. Filter size – Rear (gelatin filter insert type) – Does not use any front, screw-in filters Lens construction – 17 elements in 13 groups Maximum aperture – F3.5-4.5 Minimum aperture – F22-32 Dimensions – 3.42 Diameter x 5.12 Long Includes protective case

This lens is very sharp especially at 15mm f8-16 which is the aperture we use for landscape. It can be used on 35mm film and it will be really really wide at 15mm. It can also be used with digital camera. I used with D70 and love it. It is much sharper than sigma 12-24 if you check the mtf chart at sigma web site.
It is my favorite lens.

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