So I think I finally solved the problem-- there are a couple of tiny spring-mounted contacts at the bottom of the lens mount. Some of them didn't...
Thanks for all the replies. I'm upgrading to more professional cameras but they definitely won't be Canons. When I worked as a news photographer...
I have a non-Canon zoom and a Canon kit wide-tele lens. I clean it with alcohol and a soft rag, or with a knife to scrape the contacts or with a...
For the ten millionth time my Canon 70d tells me it can't communicate with the lens I've mounted on it. It tells me to clean the contacts. I have...
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