Forum: Pentax K-5 & K-5 II
09-01-2012, 08:41 AM
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The K-5 + 18-135 is my go to combination. It performs very well, not prime well, but very well for a zoom. Two things - 1) like most lenses its performance improves by stopping down, ans 2) it's sweet spot is between 30 mm and 75 or so. If you do those things, have calibrated it to the body, and still get poor results then swap the lens in for another one.
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