Average Reviews:
(More customer reviews)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.
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Product Description:
Pentax DA 17-70mm f/4 AL (IF) SDM Wide Angle Zoom Lens Features
Acquire wide angle, extra zoom and the highest level of optical quality with the smc Pentax DA 17-70mm f/4 ED AL [IF] SDM wide angle zoom lens. The exclusive lens SDM autofocus motor ideally complements current Pentax DSLRs with fast, accurate, quiet focus. Bringing together advanced optical technologies, including aspherical elements, special optical-glass elements, original Pentax SP (Super Protect) lens coatings, along with a Quick-shift Focus System, this new interchangeable lens is superior in terms of contrast, clarity and edge-to-edge sharpness.
Extra zoom for a wide range of shooting applications from wide angle to telephoto.
Exclusive lens SDM autofocus motor ideally complements modern Pentax DSLR bodies with SDM capabilities.*
Pentax SP (Super Protect) coating protects the exposed lens elements.
Quick-shift Focus System allows instant switching from auto to manual focus.
Developed specifically for Pentax digital SLRs.
Focal length equivalent to 26-107mm in 35mm format.
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