TheAnt wrote in post #16506182
If there was a major rumor about the 18-35 f/1.8 before it dropped, everyone would be saying it's not gonna happen.
I think ya'll need to just wait and see. Sigma is becoming the only game changer out there for lens design right now. They can pull it off.
Well, of course they could make it. Lets compare the 17-70 f/2, surely it will have OS, to the Tamron 24-70 VC.
Tamron filter size: 82mm. The Sigma will HAVE to be larger, at least, and most likely 86mm. Tamron weight:29.1 ounces. The Sigma having a wider focal range, will necessarily be much heavier, lets just agree to call it 40 ounces. I think that is reasonable, considering they will be adding OS to this lens.
Sigma won't bother if they can't pull some of the Tamron 24-70 2.8 customers, and at least a few of the 24-70II customers. To price it right, it will have to be less than the 24-70II. It is already faster than the 24-70 VC, some people will pay for that. Let's split the price difference and put this behemoth at $1800. Given the choice, I'd still go for the 24-70II. In this price range, that just isn't a lot of money.
It is my considered opinion (guess, really) that this lens won't sell, much. Sigma knows that. My guess is that a 17-70 f/2.0 OS lens is not even on the drawing board. Fair warning: I have been wrong before.