topic 5D Mark IV with 50mm lens in EOS DSLR & Mirrorless Cameras

5D Mark IV with 50mm lens

areejbashir — Wed, 07 Apr 2021 23:27:25 GMT

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

Re: 5D Mark IV with 50mm lens

rs-eos — Wed, 07 Apr 2021 23:35:19 GMT

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?

Re: 5D Mark IV with 50mm lens

areejbashir — Wed, 07 Apr 2021 23:38:24 GMT

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.

Re: 5D Mark IV with 50mm lens

rs-eos — Wed, 07 Apr 2021 23:47:56 GMT

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

Re: 5D Mark IV with 50mm lens

areejbashir — Thu, 08 Apr 2021 02:10:11 GMT

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

Re: 5D Mark IV with 50mm lens

kvbarkley — Thu, 08 Apr 2021 02:16:36 GMT

Does it AF on your EF-S camera?

Re: 5D Mark IV with 50mm lens

areejbashir — Thu, 08 Apr 2021 02:28:04 GMT

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

Re: 5D Mark IV with 50mm lens

jrhoffman75 — Thu, 08 Apr 2021 12:26:57 GMT

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.

Re: 5D Mark IV with 50mm lens

kvbarkley — Thu, 08 Apr 2021 13:03:18 GMT

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.

Re: 5D Mark IV with 50mm lens

areejbashir — Thu, 08 Apr 2021 13:49:45 GMT

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

Re: 5D Mark IV with 50mm lens

jrhoffman75 — Thu, 08 Apr 2021 13:53:00 GMT

OK. So follow my recommendation to reset your 5D Mark IV settings and Custom Functions.

Re: 5D Mark IV with 50mm lens

areejbashir — Thu, 08 Apr 2021 13:53:39 GMT

@Jrhoffman75 the 50mm works fine on my old EF camera. I just tried it out and then remounted it on the Mark IV but it still won’t work on it.

Re: 5D Mark IV with 50mm lens

jrhoffman75 — Thu, 08 Apr 2021 14:03:15 GMT

If you reset all the settings and put the 5D in Green Square Auto it sounds like your camera may be defective.

Re: 5D Mark IV with 50mm lens

wq9nsc — Thu, 08 Apr 2021 14:22:41 GMT

Did you actually reset the camera as John requested? I have heard of other cases where brand new 5D Mark IV bodies were shipped with it set for back button AF, probably done during a testing protocol before it was shipped. If set up that way, then it won't AF when the shutter release button is pressed half way.

The only other setting I can think of within configuration that would impact AF operation would be what the camera does under the AF configuration choice of what to do when "AF is impossible or far out of focus". I believe this option is on the fourth screen under the AF configuration tab with your 5D IV and when set to off with some lenses, the AF may not function properly to try to obtain focus.

But resetting everything back to factory as John suggested should set both of these back to the non-problematic default settings.

Rodger

Re: 5D Mark IV with 50mm lens

areejbashir — Thu, 08 Apr 2021 14:35:12 GMT

Thank you John for that tip, I reset the setting buts no change. But the only thing with Green Square Auto is I’m not able to set the aperture, shutter speed and iso to my liking

Re: 5D Mark IV with 50mm lens

areejbashir — Thu, 08 Apr 2021 14:39:59 GMT

@rodger thank you for your help. I reset everything and made sure the “lens drive when AF impossible” is on. But still nothing. It works when it’s in Green Square Auto Mode, but that’s not convenient for me unfortunately.
Not sure what else I should do

Re: 5D Mark IV with 50mm lens

Waddizzle — Thu, 08 Apr 2021 14:40:57 GMT

@areejbashir wrote:
Thank you John for that tip, I reset the setting buts no change. But the only thing with Green Square Auto is I’m not able to set the aperture, shutter speed and iso to my liking

Yes, let's test the lens by allowing the camera to adjust the settings in Green [A] Auto mode.

Re: 5D Mark IV with 50mm lens

Waddizzle — Thu, 08 Apr 2021 14:42:40 GMT

@areejbashir wrote:
@rodger thank you for your help. I reset everything and made sure the “lens drive when AF impossible” is on. But still nothing. It works when it’s in Green Square Auto Mode, but that’s not convenient for me unfortunately.
Not sure what else I should do

If the lens works in Green [A] mode, then there is something in your camera settings causing the problems.

Re: 5D Mark IV with 50mm lens

areejbashir — Thu, 08 Apr 2021 14:43:15 GMT

@Waddizzle it seems to work with the Green Auto Mode. But I need to work on Manual Mode 😕

Re: 5D Mark IV with 50mm lens

jrhoffman75 — Thu, 08 Apr 2021 14:45:29 GMT

Try pressing the AF-ON button. If it focuses then you need to clear all custom functions. Check your manual to see how.