For those interested... first shots with new lens
As stated before, I went out to buy me new standard-zoomlens today, the Sigma 24-70 EX f2.8
I needed a fast lens for lowlight conditions, but I didn't want to pay over a thousand euro's to buy an L-lens or other f2.8 canon-lens.
So things were narrowed down to the tamron 28-75 f2.8 and the Sigma 24-70 f2.8. As I've worked with the Sigma and I really like the build quality. I was a bit bothered by less positive stories about the softness at f2.8 at full zoom, but the tamron also suffers from some problems, like AF-hunting in low light.
In the end, I choose the Sigma, also because the photographer I know uses it for all his concert shots and is very happy with it. He reported technical problems with Tamron after extensive use, due to the lower build-quality.
I guess it all boils down to personal preferences and one has to choose at some point.
Here are 2 shots at f2.8 - 70 mm. The cat didn't care for all the attention. No postprocessing other than resizing. All things fair I'd say it's pretty much what I expected and not a drama sharpness-wise.

Cheers,
Omag
I needed a fast lens for lowlight conditions, but I didn't want to pay over a thousand euro's to buy an L-lens or other f2.8 canon-lens.
So things were narrowed down to the tamron 28-75 f2.8 and the Sigma 24-70 f2.8. As I've worked with the Sigma and I really like the build quality. I was a bit bothered by less positive stories about the softness at f2.8 at full zoom, but the tamron also suffers from some problems, like AF-hunting in low light.
In the end, I choose the Sigma, also because the photographer I know uses it for all his concert shots and is very happy with it. He reported technical problems with Tamron after extensive use, due to the lower build-quality.
I guess it all boils down to personal preferences and one has to choose at some point.
Here are 2 shots at f2.8 - 70 mm. The cat didn't care for all the attention. No postprocessing other than resizing. All things fair I'd say it's pretty much what I expected and not a drama sharpness-wise.

Cheers,
Omag
wish i could afford a decent camera 

