Reviews and Problems with Pentax DA 17-70mm f/4 AL [IF] SDM
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Lens Test: Pentax-DA 17-70mm f/4 AL SDM AF
1 February 2010
Excerpt: Pentax describes the 17-70mm f/4 lens as a “standard lens with extra zoom,” a cute catch phrase. But “standard zooms,” as they’re called, are one of the most popular lens groups. Using focal lengths from wide to tele really covers a lot of shooting, including scenery, snapshots and portraiture, making the standard zooms very useful.