Quote Originally Posted by steve_m
Will I be disappointed with the image sharpness/quality compared to my 24-105L if I go with the EFS 10-22mm?

First of all, let me say that the 10-22 is a fantastic ultra super wide angle lens.


Second: because it's an ultra super wide angle lens, it really doesn't make sense to compare it with the 17-40 or 24-105. That's like comparing an apple with an orange, or a Boeing 747 with a fighter jet, or a motorcycle with a car. They're all good at what they do, but they're so different that it really doesn't make sense to compare them.


Third, you need to think about what field of view you want. 24mm is not wide enough on your XTi. If 17mm will be wide enough, and you want a good range into the 40mm or 50mm end, then there are many lenses to choose from:
  • 17-40 f/4 L
  • 17-55 f/2.8 IS
  • Tamron 17-50 f/2.8
  • Sigma 18-50 f/2.8
  • Etc.



But the Canon 10-22 is *not* one of them, because it's a completely and totally different type of lens. Buying it to use just at 17-22mm is a mistake, in my opinion: many other 17-50 f/2.8 lenses are faster, better, and cheaper.


But if you *do* want to use something wider than 17mm, then you should consider the 10-22mm, because it's an excellent lens in that range. There are other choices from Tamron, Sigma, and Tokina as well.


Some photographers would not be happy with the 10-22 + 24-105, because they use the 17-50 range so much that they would be constantly switching lenses. The 17-50 is the most "typical" range.


But I love ultra wide angle fields of view, personally, so I would highly recommend the Canon 10-22.