17-55mm F2.8 IS - worth upgrading to from my 17-40L?

[nolimit]

I assume you understand the concept now, I would be interested to know if you think you have the right lenses in the bag?

 

[mrk]

Yes I understand now the ef-s system.

Also yes I have the right lenses, the 17-55 is my most used lens (can't use a lens all the time if it's not the right lens can you!) . The 70-200 for everything else.