04-07-2021 07:27 PM
04-07-2021 07:35 PM
What 50mm lens do you have?
Does the lens have an AF/MF switch? If so, is it set to AF (auto focus)?
Do you have any other lenses that work with the 5D?
04-07-2021 07:38 PM
04-07-2021 07:47 PM
What brand? Canon? Other? The lens should have markings somewhere on it. For example, my EF 50mm f/1.2 lens has on it near the front:
CANON LENS EF 50mm 1:1.2 L USM
04-07-2021 10:10 PM
04-07-2021 10:16 PM
Does it AF on your EF-S camera?
04-08-2021 08:26 AM
The Canon 50mm f/1.4 is notorious for an easily damaged focusing system.
Try to get access to another EF lens that you could at least borrow to try on your camera. That would determine if it is a lens problem or a camera problem.
Before you do that, try resetting the camera settings and custom functions, just in case you had back button focus engaged.
04-07-2021 10:28 PM
04-08-2021 09:03 AM
No you said:
"And no, the only other lens I have isn’t compatible with the Mark IV."
So I assume you have an EF-S camera with some EF-S lenses. Try the 50mm on your EF-S camera.
04-08-2021 09:49 AM
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