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Canon 400D focus issue

Started Aug 15, 2017 | Discussions thread
WilbaW
WilbaW Forum Pro • Posts: 11,643
Re: Canon 400D focus issue
1

spacebiscuit wrote:

When I try to focus the lens makes the sound it usually would when focusing but it doesn't beep as it would usually when it has focused. Instead in sounds like the lens is reversing back or further trying to focus again. The lens can be heard making small adjustments without ever locking on.

That's normal behaviour in Servo, so if it's happening in One-Shot it probably means there's something preventing the system seeing an in-focus subject. I would check and clean the mirror and AF sensors with a blower. Don't blow with your mouth 'cos you'll get spit on stuff.

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