Pentax smc DA 17-70mm F4.0 AL (IF) SDM

Announced Jun 3, 2008 •
Zoom lens | Pentax KAF3
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Review of Pentax 17-70mm f/4 AL IF SDM SMC DA
By: SLR Gear

Optically, we can't find a whole lot to complain about with the Pentax 17-70mm ƒ/4. It's decently sharp even wide open; light falloff and distortion aren't much to be concerned about. Outside of the middle of the zoom range, the numbers for chromatic aberration are a little high for our taste: I'd assume that in order to keep costs down, Pentax opted not to include ED glass elements. However,...

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