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Sigma 120-300mm f2.8 EX DG HSM

Review Date: Nov 1, 2014 Recommend? no | Price paid: $3,899.00 | Rating: 5 

Pros: Built on a rock solid, reliable lens with a great track record.
Build quality/quality control of the newer version of the 120-300mm OS (Sport) is not as good as the original 120-300 DG EX HSM.

I recently purchased the new Sigma 120-300mm OS (Sport). I have had several issues with it and remain quite frustrated as it does not perform as well as my older 120-300 EX DG HSM. The primarily reason for going to the new lens was to get the stabilizer features but this new lens does NOT hold focus through the full range of the lens like my older model did. Not even close. As well, the image tracks slightly as I push in. I have contacted Sigma themselves and it appears it is a known problem.

The dealer replaced it with another lens but I am finding the same problems. Even with the in camera calibration, back focus remains an issue through out the full focal range of the lens. This is a major issue for me needing to shoot in MF mode when I want to by pass the menu preset target focus range and reframe for a quick tighter shot.

I am going back to the older version of the 120-300mm DG EX HSM. Way more reliable. A rock solid lens with no issues, just put it on and start shooting every time.