Upgarding from Canon 17-85 to Sigma 17-70 OS ?

The 17-85mm f4-5.6 has served me well, but I am just looking for something new now, and faster in low light conditions.

looking to upgrade to the Sigma 17-70 DC Macro OS HSM mainly because of the bigger apperature. the 15mm of lost lost zoom is fine with me as I never really used the full zoom on the 17-85.

is this lens sharp at f2.8? my canon was very sharp at 17mm and f4, I just want good quality. I mainly shoot automotive and landscape time to time.

anyone can chip in if this will be a good upgrade?

Definately, some people will say it's soft wide open but i can't honestly see it. Fully usable and nice wide open at any focal length. Maybe i just got a good copy, but i doubt it.

I've loved this lens since the day i got it! Has allowed me to take pictures where the 18-55IS kitlens wouldn't even focus as it's been to dark, with the sigma it has been no problem.

Also the macro function is alot of fun to use! 1:2.7 macro though, but it's enough to get nice macros imho!


EDIT: I May also add that i was also looking at the 15-85 and 17-85 lenses among the canon 17-55, tamron and sigma 17-50 f/2.8... And i couldn't justify getting the canon 17-55 because of the price which is 3 times more than the sigma.. the 17-50 just seemed to short for my likings also lacked macro function..

I looked at the 15-85 to start with and then found the 17-85 which was cheaper. After a little more research I came across the the SIgma 17-70 and having put the 17-85 and 17-70 on my body I chose the 17-70 straight away!

I love this lens and cannot fault it. At the price you can pick them up for, it is definitely worth it as well!

Will

awesome, thanks for the tips.
should make a decent combo on the new 600D :- D