Lens Opinions
My main camera lens at the moment is the EF 28-135mm IS USM, which although excellent for a non-L lens is limited as on a non-fullframe DSLR the widest it goes is 45mm. Now if I had a decent wide angle lens such as the 10-22mm this wouldn't be a problem, but the only lens I own going wider than 28mm is the kit 17-55, which isn't great.
Thus I've been thinking about selling the 28-135 and buying the 17-85mm IS USM, which is clearly targetted as being the 28-135 for cropped digital SLRs. I'll loose the extra zoom but in return gain the wide angle in a single lens. However, the optical quality of the 28-135 is excellent for a non-L lens, and I'm worried that the 17-85 isn't up to the same quality. Are there any really picky camera geeks out there who have used both the 28-135 and 17-85 and can help me decide?
NP: Prose Combat, MC Solaar
A friend just got the EF-S 17-85 IS, and while I can't yet accurately comment on the image quality (other than it has similar barrel distortion to the 18-55 kit lens; the 10-22 is dreamily flat), the build quality is a little better than the cheap-ish feel of the 28-135. I would have easily bought it instead of the 28-135 if it had been available at the time.
Another lens you should consider, if image quality is of the utmost priority, is the EF 17-40 4L lens. It has been a popular lens for 10D owners, and is usually under $700 USD. And it's L glass.
I'm not too worried about EF-S as I don't see myself being able to afford a 5D any day soon, and if I can I'll be able to afford new glass too. :)
I don't think it's perfect but it's a very convenient range. I don't have anything to compare it with though.
I do own EF-S 17-85 and as long as I'm not terribly happy about the image quality, there just isn't any other option in the Canon line-up. The 17mm is really essential to have, I could not give it up.
You could consider EF 24-105/4L which is affordable and superior optically, or EF 17-40/4L if you don't need the longer part of the "usual" zoom range.