Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM

Announced Feb 21, 2007 •
Zoom lens | Pentax KAF2
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Resolution: Very, very good in the center (1/3) , but very bad iin rest 2/3 ( f 4 or less); Excellent at f 5,6 or more, very sharp (print at 40 cm x 60 cm). Color and contrast, superb. In 16 mm high distorsion. Hermetic, no problem with water or dust. Perfect to nature and mountain. Camera K20D.

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spoorthy
 
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This lens is fabulous but its not perfect here is what I think of it PROS: 1) fabulous build quality 2) great weather sealing 3) near silent autofocus 4) good center contrast 5) good color CONS: 1) very heavy and big 2) zoom ring very uneven 3) edge sharpness is pretty bad wide open 4) expensive ($800 vs tamron 17-50 f/2.8 for $400) 5) autofocus is pretty slow (not horrible though)

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