Tamron 17-50 f2.8 or Sigma 17-70 f2.8-4.0 HSM?

Started Nov 20, 2011 | Discussions thread
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Tamron 17-50 f2.8 or Sigma 17-70 f2.8-4.0 HSM?
Nov 20, 2011


I am considering buying either the Tamron 17-50 f2.8 (435g) or the Sigma 17-70 f2.8-4.0 HSM -- to get the f2.8 aperture in a wide-angle (16-17mm) zoom. My narrowing it to these two is partly an issue of weight and cost…

The Sony 16-50 f2.8 and the Sigma 17-50 f2.8 both have SSM/HSM focusing, the best IQ reviews, but seem like they would be too heavy on my A55 (at 575g each). The Tamron is 435g and the Sigma 17-70 is 530g. (Another option, the Sony 16-80 Z, is f3.5-4.5 and no SSM.)

The Sony and Sigma f2.8 both cost about $670-700, and the 16-80 Z is $850, while my two choices cost about $435.

I have read dyxum.com reviews, though there are less than 10 for the Sigma. The reviews in photozone.de, slrgear.com, and lenstip.com suggest that the Tamron 17-50 has a bit better IQ. But the Sigma 17-70 has HSM (good for video) and perhaps better CA control. The Tamron is a steady f2.8 while the Sigma is f2.8 only up to 20-22mm; after that, it is essentially a f3.5-4.0 lens.

In the end, I might order both from a company where I can return one within 14 days. By I am very interested in hearing any real-world experience in comparing these two choices.

Has anyone tried both the Tamron 17-50 to the Sigma 17-70? What is your practical evaluation of them? What would you recommend?

Any other options in this price range to consider?

Thanks in advance,


'Let the beauty of what you love be what you do. Sell your cleverness and buy bewilderment. Cleverness is mere opinion, bewilderment is intuition.' -- Rumi

Sony SLT-A55
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