Pentax's pro telephoto zoom: constant f/2.8, a DC motor, three-way focus limiter, detachable tripod mount and AW sealing. 1.76kg; takes Pentax teleconverters for more reach.
Select up to 2 cameras to compare against the HD D FA★ 70-200mm f/2.8 ED DC AW. It's always pinned as the baseline.
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