Aviopic From Netherlands, joined Mar 2004, 2681 posts, RR: 40
Reply 1, posted (9 years 4 months 4 days 23 hours ago) and read 3515 times:
I've used the 28-75/2.8 for quite some time and it was pretty good.
Slightly sharper then the Sigma 24-70/2.8 which showed less barrel distortion and is equipped with a bit faster AF, minimal differences though.
Reviews of the this Tamron(and others) can be found on several sites and usually they score a decent result.
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