Alright so I've been looking at some lenses, and with the help of you guys I've pretty much settled on the Sigma 10-20. Now I'm still debating with myself the walkaround lens to go with it.
Would I be better off with a tamron 17-50 or a 28-75? Which would complement the 10-20 better? Would i miss the 21-27mm range if I went with the 28-75? The f/2.8 of the 17-50 might be nice on the wide end, since the long end of the 10-20 is f/5.6. A little overlap never hurt anyone. I'm just worried about not having enough reach.
Any other suggestions? I thought of the 24-105L, and 17-55, but both are a bit out of my range after the Sigma. Would the 28-135IS have good optics (comparable to the Tamrons)? I can live with worse build quality if it means good optics. That's ultimately what matters to me, though build quality and focusing speed are pluses. the only thing I'm afriad of is being spoiled by the HSM/USM and then getting angry with the Tamron for being slower at focusing. Is the focus speed something to worry about? I'm used to the kit lens and the 50 f/1.8 right now, so my expectations for focus speed are in no way high.
Edit: To put things in perspective I eventually plan on getting an 85 prime, a 135 prime, or a 70-200 f/4L (preferably IS, but funds probably won't permit), but this is in no way in the near future.
Thanks


