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Pentax 17-70mm f 4 DA SMC AL IF SDM Lens for Pentax Digital SLR Cameras

Pentax 17-70mm f 4 DA SMC AL IF SDM Lens for Pentax Digital SLR Cameras by Pentax $446.35 At Amazon on 3-31-2012.

Equivalent focal length of 26-107mm in 35mm format, when used with digital SLR cameras. ED and aspherical elements compensate for chromatic and spherical aberration. The image circle of the lens has been created to match the smaller image recording area of digital SLR cameras. The Quick-Shift Focus System allows to instantly shift to manual focus once the subject is captured by AF. Pentax 17 - 70mm f/4 AL (IF) SDM Auto Focus Super Wide Angle Zoom Lens 21740 Lenses & Filters I have owned this lens almost from the day it was introduced in the U.S. It has a lot going for it--excellent construction, quiet focusing and a very useful zoom range. Between 17-50mm focal length, it is about as good as you could ever hope a zoom lens could be. The trouble begins above 50mm, where the image is soft at infinity focus, even stopped down to f8. This is not to say that the lens in unusable between 50-70mm. It probably can hold its own against similar lenses, e.g. the Sigma 17-70, which many users like. But if you are a fanatic about IQ, as I am, you may not be fully satisfied. Back To Top Pentax 17-70mm f 4 DA SMC AL IF SDM Lens for Pentax Digital SLR Cameras Available from Amazon Price: $446.35 Updated on 3-31-2012.

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