Lenstip; review of the Pentax 50mm F1.8 lens.

Hi,

Just read the review of the new all plastic Pentax 50mm F1.8 lens, in general it got a good review,however, the autofocus test was in their words "a disaster"  with only 50% of shots in focus.Is this confined to this particular example of the lens?

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Dave's clichés