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18-135mm lens advice Pentax or Sigma AF

Started May 1, 2012 | Discussions thread
svein wilhelm kristiansen Regular Member • Posts: 184
Re: 18-135mm lens advice Pentax or Sigma AF

I have just got one of the hated 18-135. And to be frankly, I think it is a great lens. Very fast and precice focus. The only lens I have with no focus error at all. It's extremely sharp in the center the whole way through the zoom-range. It's almost as fast as the 17-70 in it's range. 4,5 at 68mm and a tad faster at 18mm. My copy is even rather sharp in the edges at 135mm... The build quality is great, and it's a WR-lens. I'm going to "love" this lens. I do have several primes, but my main problem with my Pentax-system is a low-light-focusing-problem. But I can say that this lens (18-135) is the only lens I have, or have had; that focus without any problems at all!
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svein wilhelm

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