Controls and Features
Unlike many manufacturers, Pentax provides "shake reduction" (SR) functionality within the camera, instead of inside each lens to be purchased. This is advantageous as any lens can be used with full SR functionality, and the lenses are cheaper to manufacture as they do not require any shake reduction equipment inside.
Another feature that sets Pentax lenses apart from other manufacturers is that many of their top line lenses, like their camera bodies, are weather proof, allowing for their continued use in poor weather and wet locations. Pentax currently provides weather sealed premium lenses up 300mm, and by special order, the FA*600mm. The largest lens produced by Pentax was the Reflex 2000mm, with non-mirrored lenses available up to the A* 1200mm. With all major manufacturers, super telephotos of this range are no longer in production. Pentax provided premium focal lengths well beyond 1200mm, such as their 3800mm through the Pentax telescope division. Tamron and Sigma also produce a significant number of "third-party" lenses for Pentax cameras.
Read more about this topic: Pentax Lenses
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