A constant-f/2.8 ultra-wide zoom (17-27mm equivalent) for APS-C Pentax bodies, built for astro and landscape: a focus-clutch mechanism, a DC motor and full weather sealing rated to -10°C. 704g with 82mm filters.
Select up to 2 cameras to compare against the HD DA★ 11-18mm f/2.8 ED DC AW. It's always pinned as the baseline.
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