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Forum: Pentax DSLR Discussion
07-06-2015, 09:15 AM
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The 16-50 is a stop or two faster throughout its range than the 18-135. If you are shooting landscape, it probably isn't a big deal, as you'll be stopped down quite a bit anyway, but if you want to shoot at f2.8, then it is the only thing in the Pentax line up that covers this set of focal lengths with that aperture.
I've been pretty satisfied with my copy.
 Dollywood Express by Vincent1825, on Flickr
 Waterfall by Vincent1825, on Flickr
This is at f2.8
 The Wonder a Balloon Brings by Vincent1825, on Flickr
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Forum: Pentax DSLR Discussion
07-04-2015, 12:34 PM
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I guess I would say that if you want more of a walk around lens that is sharper edge to edge, then the newer DA 16-85 is probably a better choice. Tamron 17-50 f2.8 is sharp and pretty nice in that range. As Norm say, the 16-50 f2.8 is a nice lens but suffers from CA and purple fringing through its range.
Don't get me wrong, the 16-50 has nice colors and good contrast, but CA just isn't its strong point.
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