With the rebates that are out there now, I have come across a dilemma for choosing a new lens.... Do I go with:
1) Sigma 70-200 OS, OR
2) Canon 70-200 USM...
Yes, if $$ were no object, the Canon 70-200 IS II would be a no brainer... BUT it is. The main differences I see are the lack of IS for the Canon and it being an older lens design/technology. The Sigma does seem to focus a bit slower, but how is it in real world use for sports and fast action? I would be using it on a gripped 7D.
Any thoughts or insight would be appreciated! Thanks in advance!
I'd go with the Canon. Its excellent, assuming you are talking about the 70-200mm f.2.8L (Non IS) If you ever go to FF, the Canon will pull away.
Note that at the wider apertures and at 200mm, the Sigma is weak. Its good at f/5.6, but you don't need to pay all that money to lug around a lens and use it at f/5.6. Since you are likely to use a lens at 200mm and f/2.8 for sports, the Sigma is a disaster there.
If you do get the Sigma, try to find a used one. they don't hold their value as well as Canon, so it should be cheap.