回答
你不是唯一的一个人，美国爱好者的大量17-85出现同样的问题，其原因就是排线设计不合理，在调Zoom的时候排线会打死弯，然后就出现接触不良甚至折断的问题。有的人是一年坏一个。但是修理也不复杂，换掉排线就好了。但是仍然会坏。现在美国有人在网上卖替换的排线，6美元一个，让你自己换。不只是17-85有这个问题，佳能的小数码S100有同样问题，调焦时会毁排线。我现在越来越怀疑佳能的质量了。
下面是英文
wrote:Thesamehappenedtome:afterbeingrepairedin2009(at
thecostof290Euro)，thelensfailedagainin2010.WhenIbroughtit
toanindependentrepaircentre(IwasinCanada)thecommentwasthat
ithasadesignmistake(somethingwitharibbontransmittingdata)and
havingitrepairedwasstronglydiscouraged.Itooktheiradviceand
boughtthe15-85-untilnowverypleased.Noideaiftheissuehasbeen
solvedbyCanoninthe17-85stillonsaletoday.
Therepaircentreisright.Theef-s17-85doeshaveadesignmistake.There
isaflexicablegoingtothediaphragmthatbendssharplywhenyou
zoominandout.Theproblemisworstatthewideend.Ihadmy
lensfailandIdecidedtorepairthelensmyself.Itisnotsomething
thatIcanrecommendtoeveryonebutifyouarecarefulandareusedto
repairingequipmentitiscertainlypossible.Youwillneedtodosome
finesoldering.Mylensworksperfectlyagainforabout$6forthenew
flexicableuntilitbreaksagaininafewyears.Canondefinitely
droppedtheballhere.Everyef-s17-85willfaileventuallyandthatis
apitycauseit‘saveryusefullens.
Ifyouwanttoknowmoregoogleef-s17-85diaphragm.
