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| 03-13-2013, 07:49 PM | #31 |
 Originally posted by ivanvernon  The Sigma does in fact have a constant 2.8 aperture. See the comparison between the three competitive lens, Sigma, Tamron, and Pentax: DA* 16-50mm vs. Sigma and Tamron 17-50mm F2.8 Comparison - Introduction - PentaxForums.com The Tamron, by the way, comes out very well in this comparative review, and this is one reason I decided to buy my Tammy 17-50. | |
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Post #24 by HSV
