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03-11-2008, 07:05 AM   #1
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Sigma 24-70 vs Sigma 28-70 vs Tamron 28-75

regardless of price which one will have the fastest focus and which one wil have the best iq.? I need a good prime mid range zoom.

03-11-2008, 07:13 AM   #2
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I own the Tamron and have heard the Sigma 24-70 is a bit slower to focus only because it's a bit heavier and there's more glass/weight to move. Heard good things about the Sigma 28-70.

The Tamron is fast, sharp and great IQ. nothing at all to complain about this lens at all. I knew and owner that had this lens and the FA*28-70 Pentax and the only difference was the Tamron locked focus a little bit quicker (from one extreme to the other because it is heavier) and the Pentax had a little smoother bokeh. Both were generally equal in IQ and sharpness.

You might be hard pressed to find anyone that has had all 3 and compared them head to head.
03-11-2008, 08:02 AM   #3
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You might want to check out this post on the Sigma 24 - 70 f2.8
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