From Library Journal

Part of Amherst’s “Photo-Imaging” series, this manual concentrates on the purchase, use, and technical considerations of the zoom lens. Bial (Looking Good: Photographing Your Library, ALA, 1991) has tailored his text for the creative amateur who uses an electronic 35mm camera. Particularly helpful are the numerous images that illustrate, for the novice, the varying effects of different focal lengths. An entire manual on the zoom lens may not be warranted in m (more…)

Technorati Tags: Lens, Paperback, Photography, PhotoImaging, Series, Zoom

From the Manufacturer

The Pentax smc P-DA 18-55mm f3.5-5.6 is recommended for use with digital cameras. Ideal for beginners, it provides a focal length covering a wide to moderate wide-angle range. Like all Pentax lenses, the smc P-DA 18-35mm f4-5.6 zoom lens is treated with Pentax’s acclaimed smc coating for maximum light transmission, sharp definition, and high contrast while minimizing flare and ghost imaging. What’s in the box: Lens, lens cap, rear lens cap

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Technorati Tags: 1855mm, Cameras, Digital, f/3.55.6, Lens, Pentax, Samsung

Tamron now offers a lightweight, compact, high-image-quality telephoto zoom lens with macro capability of 1: 2 that can be used with digital cameras. This new lens is a Di type lens using an optical system with improved multi-coating designed to function with digital SLR cameras as well as film cameras.With this 70-300mm telephoto zoom lens, flipping a macro switch in the focal length range of 180mm to 300mm obtains a maximum magnification ratio of 1: 2 at a minimum focus distan (more…)

Technorati Tags: 70300mm, Cameras, Digital, f/4.05.6, Lens, Macro, Pentax, Tamron, Zoom

Amazon.com

Designed for exclusive use with Pentax KAF-mount digital SLR cameras including the *ist D and the *ist DS digital SLRs, the Pentax DA 50-200mm f4-5.6 ED lens offers 4x zoom coverage in the telephoto range. Further, the lens features an angle of view from 31.5 degrees to 8.1 degrees (equivalent in focal length from 76.5mm to 306mm in the 35mm format). The lens also incorporates an Extra-low Dispersion (ED) glass lens element (11-element/10-group optical construction) (more…)

Technorati Tags: 50200mm, Cameras, DSLR, f/45.6, Lens, Pentax, Samsung