From your lens lineup, you definitely like quality. Are you sure that you don't need lower light and greater bokeh from primes though?

You have a 10-22mm and you're thinking about getting a 50mm f1.8 and you question the build of the 17-55mm?
You could always buy two Tamron 17-50mm f2.8's just in case one breaks.

Whats wrong with the build of the Canon 10-22?
Its a very well built lens.
EDIT - lol I forgot, you have a weird thing against the 10-22!![]()

EF-S lenses are built as well if not better than most EF lenses. EF certainly doesn't always mean L!
woof woof said:Jim, if that post is aimed at me I did say that EF-S lenses are good enough.
1.2f said:anybody used the above lens on a 7d, been thinking of this lens as an alternative to the 17-55 f2.8 which seems to have a big question mark over it regarding its build quality.