I am looking at getting a 17-50mm F2.8 lens as a walk around and an upgrade from the very old 18.-200mm Sigma that I have. but I can't decide which one to get or to drop some extra money and get a 17-40mm canon L lens.
I have used the 17-40 before and it feels nice and I like the colours from it. But I'm not entirely sold on it. I'm not planning to go FF at this stage and am thinking that F2.8 instead of 4 and IS could be a good thing.
Has anyone had experience with the following and if so what is your thoughts with them?
-Sigma 17-50mm F2.8 EX DC OS HSM
-Tamron SP AF17-50mm F/2.8 XR Di II VC LD Aspherical [IF]
-Canon EF 17-40mm f/4 L USM
Would the extra stop and IS be worth it or would it be worth spending the extra on the canon. I'm not looking at the Canon 17-55mm IS because it's our of my price range.
This is mostly going to be used for landscapes and probably party/portrait shots so low light performance can be a factor.