I need to get a 10mm zoom lens of for my 40D and am having massive difficulty in choosing which to get.
The 3 I was looking at is the Canon 10-22mm x Sigma 10-20mm x Tamron 10-24mm
From the comparisons I've seen on-line, The Canon seems to be the best of all worlds (no surprise) bar price.
The Sigma pwns in terms of CA, but has been known to have random soft spots (really worried about this), as well as poor quality control, and the Tamron, although cheap, seems to have a poor build quality, worse AF, bad AC, but super sharp central focus.....
The sigma is also the slowest at F4 @ 10mm.....
Was planning on getting this lens for an upcoming trip to Japan, and also for some sport/action shots. (Which is y the AF is important too)
Any ideas what I should do?