Question about Canon EOS 40D Digital Camera
I lost auto focus on 40D when using ST-E2 and 2 580EX II. I tried multiple lenses, including EF 50mm f/1.4 and EF 70-200mm f/2.8L; the 40D would not auto focus. When I switched to a 30D body everything worked. What happened to the autofocus on the 40D and what can I do to get it back?
Try taking the battery out and putting it back in. If that doesn't work try cleaning the len's contact sesnors with a pencil eraser.
Posted on Jun 23, 2009
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Posted on Jan 02, 2017
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