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9.0 out of 10

Sigma 50-200mm F4-5.6 DC OS HSM

Sigma’s 50-200mm F4-5.6 DC OS HSM is designed for portability an Read more

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Reviews and Problems with Sigma 50-200mm F4-5.6 DC OS HSM

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Overall 4

Sigma 50-200mm f/4.0-5.6 DC IF SLD Optical Stabilized (OS) Lens with Hyper Sonic Motor (HSM) for Pentax Digital SLR Cameras

Franc-Eric, Amazon
19 January 2012
  • Summary: Unfortunately, the vendor did not fully test compatibility of this lens with all Pentax cameras. Thus, while it appeared to be a nice lens, the autofocus function was inoperable on my Pentax K10-D. I thus returned the lens since the manual focus ring on the lens did not operate smoothly. It wasn't enough of a good deal for me to forgo the autofocus function. I'm sure it's a fine lens not just for K10-D owners.
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