Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM
Announced Feb 21, 2007 •
Zoom lens | Pentax KAF2 | 21650
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Hi all, I just bought a used lens (16-50) on ebay and I'm finding I have some focusing issues and I don't know if I'm being a pixel peeper or if I need to return it. If I zoom in to 50mm and manual focus then pull out it loses focus. I thought a rule of lenses was that you zoom in to get critical focus then pull back out and you should ensure perfect focus that way but this one goes out of focus. Secondly and more importantly, it seems to frequently (though not always) focus just a little...
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