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Latest Review Posted HD Pentax-D FA 150-450mm F4.5-5.6 ED DC AW
I deliberated a long time before investing in this lens (at the time owning the K-3). I have an excellent HD DA 55-300mm ED WR lens, which is ideal for carrying around as a convenient long reach companion for my 'everyday' superb HD DA 16-85mm ED DC WR lens.
I was interested in getting longer reach for wildlife, and very fast focussing response for action shots.
After investing in the K-3iii a few months ago, I decided to take the plunge in the HD Pentax-D FA 150-450mm F4.5-5.6 ED DC AW (at black Friday price), to compliment the greatly enhanced AF, dynamic range and high ISO performance of the K-3iii. I certainly have not been disappointed. The HD Pentax-D FA 150-450mm F4.5-5.6 ED DC AW is a superb lens. Even with the lens set on the full zoom range setting, focus lock on moving subjects is virtually instantaneous, with no hunting. It tracks flying birds with a very high hit rate and focus locks on oncoming cars at motorway speeds with consummate ease and 100% hit rate (at all aperture settings).
At f 5.6 sharpness at very good. Step down half a stop and sharpness is as good as a very good prime lens, at all focal lengths and corner to corner performance across the frame. Colour rendition and contrast is at the best Pentax standards and CA is virtually zero in high contrast conditions, at all focal lengths.
Some commercial reviews note the focus lock is for the short end only, however so far the zoom adjustment has the right level of resistance to prevent zoom creep.

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