So again I'm admired to Roger Ciala's blog entry. You can take a look on which lenses in their business require more repairs and why, as well camera bodies. There is Canon as well.
http://www.lensrentals.com/blog/2012/09/lensrentals-repair-data-january-july-2012
The quality of his posts is really really high.
BTW: Words "Nikon fanboys" were often used
Quote: "Would I change brands or something over it? Of course not. That’s silly. Nikon makes excellent, reliable equipment and most people need a repair maybe once every couple of years. But I certainly am advising newcomers in a different direction, and I’d be a bit hesitant about picking up used Nikon equipment."
Another quote: "Among the Canon zooms, the 24-105 L is one we just think of as bulletproof. Never fails. The Canon 17-55 IS used to have lots of IS failures but obviously got fixed a couple of years ago. Another lens that rarely fails."
http://www.lensrentals.com/blog/2012/09/lensrentals-repair-data-january-july-2012
The quality of his posts is really really high.
BTW: Words "Nikon fanboys" were often used
Quote: "Would I change brands or something over it? Of course not. That’s silly. Nikon makes excellent, reliable equipment and most people need a repair maybe once every couple of years. But I certainly am advising newcomers in a different direction, and I’d be a bit hesitant about picking up used Nikon equipment."
Another quote: "Among the Canon zooms, the 24-105 L is one we just think of as bulletproof. Never fails. The Canon 17-55 IS used to have lots of IS failures but obviously got fixed a couple of years ago. Another lens that rarely fails."