05-02-2011, 06:10 PM
I used to own the Tamron 18-270 when it came out before the Sigma was released. In practice, I found the resolution on the wide end to be decent enough but it felt lacking on the long end. Different people will have different levels of acceptability, but taking Brightcolours' comment on resolution that would give me concern for the Sigma's quality on the long end.
On the other side, it can be convenient to have in lens stabilisation on longer focal lengths if you're likely to be using it in unstable conditions (e.g. outdoors on a windy day), where the more stable viewfinder image can help.
On the other side, it can be convenient to have in lens stabilisation on longer focal lengths if you're likely to be using it in unstable conditions (e.g. outdoors on a windy day), where the more stable viewfinder image can help.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.