08-29-2014, 02:13 PM
The Sigma 17-50mm f2.8 OS HSM is better built than your old 17-50mm Tamron. It is a bit more contrasty, it has less problematic CA at 17mm. It focusses more accurately and silently. It offers IS. From what I have seen, bokeh is pretty pleasing too.
I wonder which phone offers a standard zoom?
I wonder which phone offers a standard zoom?