I currently have a Canon 17-40L, which is a fantastic lens. I find myself in situations when I could use f/2.8. I've been looking at possibly adding another lens to my bag to help with these situations.
Part of me wants to sell the 17-40 and get the Canon 17-55 f/2.8 IS. I've also been tossing around the idea of just purchasing a Tamron 17-50 f/2.8 and keeping the 17-40. The only drawback to that scenario is that I mostly shoot sports with a 40D/30D combination and I'm not sure if the AF of the Tamron can keep up with fast action. I'm also not totally impressed with Tamron's reverse zoom ring which is why I will be selling or trading my Tamron 28-75 to get a Sigma or Canon version.
I've recently been presented with an offer to trade my 17-40 for a Canon 16-35 f/2.8L MKI (produced in 2003) plus $300. I'm really leaning toward this deal!
Any input and/or ideas would be greatly appreciated. I'll have to make a decision pretty quick if I want the 16-35.
Thanks in advance.