$200 · Sigma wide angle zoom 15-30mm f/3.5-4.5 AF EX DG Aspherical Nikon Mount

This is a full frame rectilinear super wide angle zoom lens for Nikon cameras. Rectilinear means it keeps lines straight, which is especially useful for architectural photography. It comes with the original box and literature and a sturdy custom fit case. I have used it professionally for many years. See some of the results in the images. (From Sigma lens literature) The Sigma 15-30mm f/3.5-4.5 EX DG Aspherical lens can be useful for images of landscapes, large buildings, group photographs and even more. Delicate compositions can be adjusted by zooming, helpful for close-up photography. This unique lens provides excellent depth of field at its shortest focal length for amazing landscape photography. This is an ultra-wide zoom lens that covers a large wide-angle range from 15 mm to 30 mm. With a minimum focusing distance of 30 cm (11.8 inches) throughout the entire zoom range, it is an ideal lens for Digital SLR Cameras. It incorporates 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. Minimizing distortion is a most important issue for zoom lens, but Sigma has succeeded, providing image quality with minimal distortion via aspherical lenses. This lens incorporates an internal focusing system, which eliminates front lens rotation. Since focusing does not change the 15-30’s overall length, this lens is easy to hold and use. A petal-type hood is used to minimize glare. The lens also incorporates Dual-Focus (DF) mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus.