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5D Mark IV with 50mm lens

areejbashir
Contributor
Just received my Mark IV, but for some reason my 50mm lens AF (Auto Focus) won’t work. It won’t focus on the pointed area, it won’t even bleep. What could be the problem?

Thank you
29 REPLIES 29

rs-eos
Authority

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?

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Ricky

EOS 5D IV, EF 50mm f/1.2L, EF 135mm f/2L, 600EX-RT (x6), ST-E3-RT
EOS C70, RF 24-70 f/2.8L IS, EF-EOS R 0.71x

areejbashir
Contributor
I’m not sure what 50mm, how do I find out?

Yes, it has a switch which is set to AF.

And no, the only other lens I have isn’t compatible with the Mark IV.

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

 

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Ricky

EOS 5D IV, EF 50mm f/1.2L, EF 135mm f/2L, 600EX-RT (x6), ST-E3-RT
EOS C70, RF 24-70 f/2.8L IS, EF-EOS R 0.71x

areejbashir
Contributor
Oh sorry, yes it’s a canon EF 50mm 1.4

Does it AF on your EF-S camera?

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.

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic

areejbashir
Contributor
@barkley, do you mean does my camera have a AF/MF switch?if so, then no it doesn’t

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.

areejbashir
Contributor
@barkley The 50mm works fine on my EF-S, focuses, bleeps and shoots. I just tried it.
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