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Rick, Camera and Video Technician
Category: Camera and Video
Satisfied Customers: 1703
Experience:  25+ years experience as a camera and video technician.
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I have a Canon 400mm f5.6 lens. Today, the manual focus

Customer Question

I have a Canon 400mm f5.6 lens. Today, the manual focus seems to be sticking about mid range. By sticking, I mean, when I turn the lens to focus it seems to stop focusing eventhough I'm still turning the focus ring. In a matter of seconds it starts to focus again. Autofocus is working fine. Thanks.
Submitted: 1 year ago.
Category: Camera and Video
Expert:  Rick replied 1 year ago.

Most focus mechanisms have a slip fit in the focus rings. This allows for extra force applies at the end of the focus scale. This can loosen up over time and will cause the focus ring to slip at the wrong places. This really isn’t a user serviceable problem and should be repaired by a qualified technician. You may want to check locally for a camera repair shop in your area,or, if you need assistance finding a shop, please let me know and I'll locate one for you.

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