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Sigma 18-200mm f3.5-6.3 DC OS

18-200OS
Review Date: Feb 5, 2008 Recommend? yes | Price paid: Not Indicated | Rating: 6 

 
Pros: Great focal length range and OS (obviously)
Cons:
Soft pictures compared to 18-125 non-OS

I ordered three of these (I always get more than one copy and pick the best) looking to replace my older Sigma 18-125 (which is exceptionally sharp). Extended range and OS sounds great, but I always compare IQ. A pixel peeping comparison with my 18-125 revealed my old lens significantly sharper at f4.5-f8, even at 125mm and 1/60sec times (using OS on 18-200). So, I returned 'em all. For me, this is my walk-around lens and I want best IQ. Yes, the OS version can shoot between 1/10 and 1/30, whereas my non-OS will have shake in that range, but only a limited number of my shots require this time range and I can usually crank up the ISO to 800-1600 on my Canon 30D to compensate. So, I'm keeping my 18-125 and practicing my flash technique!