你不是唯一的一個(gè)人，美國(guó)愛(ài)好者的大量17-85出現(xiàn)同樣的問(wèn)題，其原因就是排線(xiàn)設(shè)計(jì)不合理，在調(diào)Zoom的時(shí)候排線(xiàn)會(huì)打死彎，然后就出現(xiàn)接觸不良甚至折斷的問(wèn)題。有的人是一年壞一個(gè)。但是修理也不復(fù)雜，換掉排線(xiàn)就好了。但是仍然會(huì)壞?，F(xiàn)在美國(guó)有人在網(wǎng)上賣(mài)替換的排線(xiàn)，6美元一個(gè)，讓你自己換。不只是17-85有這個(gè)問(wèn)題，佳能的小數(shù)碼S100有同樣問(wèn)題，調(diào)焦時(shí)會(huì)毀排線(xiàn)。我現(xiàn)在越來(lái)越懷疑佳能的質(zhì)量了。
下面是英文

wrote:The same happened to me: after being repaired in 2009 (at
the cost of 290 Euro)， the lens failed again in 2010. When I brought it
to an independent repair centre (I was in Canada) the comment was that
it has a design mistake (something with a ribbon transmitting data) and
having it repaired was strongly discouraged. I took their advice and
bought the 15-85 - until now very pleased. No idea if the issue has been
solved by Canon in the 17-85 still on sale today.

The repair centre is right. The ef-s 17-85 does have a design mistake. There
is a flexi cable going to the diaphragm that bends sharply when you
zoom in and out. The problem is worst at the wide end.I had my
lens fail and I decided to repair the lens myself. It is not something
that I can recommend to everyone but if you are careful and are used to
repairing equipment it is certainly possible. You will need to do some
fine soldering. My lens works perfectly again for about $6 for the new
flexi cable until it breaks again in a few years. Canon definitely
dropped the ball here. Every ef-s 17-85 will fail eventually and that is
a pity cause it‘s a very useful lens.

If you want to know more google ef-s17-85 diaphragm.