topic Re: Can't user vintage lenses on EOS M50 in EOS DSLR & Mirrorless Cameras

Can't user vintage lenses on EOS M50

tempuser11293 — Tue, 03 Feb 2026 17:34:30 GMT

I am connecting a vintage EF lens to my EOS M50 using an EF to EF-M adapter. The lens is old and is completely manual with no electronics. Every time I try to take a photo it gives me error 01 because it cant communicate to the lens since theres nothing to communicate with. How do I disable this error warning? It's incredibly annoying.

Re: Can't user vintage lenses on EOS M50

jrhoffman75 — Tue, 03 Feb 2026 18:41:24 GMT

There should be a menu setting that allows shutter actuation without lens attached.

Re: Can't user vintage lenses on EOS M50

March411 — Tue, 03 Feb 2026 19:10:11 GMT

John nailed it!

This is from memory since I sold my M50. Give this a shot to release shutter without lens attached

Place the body in M mode to enable all the menus
Select the menu button
Go to the wrench icon
Select setup
Page 5
Custom functions option
Function 3 set shutter actuation without lens it to 'enable'

Reverse to disable when you take the lens off or you can shutter the camera with the lens off by mistake.

Re: Can't user vintage lenses on EOS M50

tempuser11293 — Tue, 03 Feb 2026 21:12:10 GMT

I've enabled this setting and it still happens, could this still be happening because I am using an EF to EF-M adapter that does have electronic traces, but the vintage EF lens does not?

Re: Can't user vintage lenses on EOS M50

jrhoffman75 — Tue, 03 Feb 2026 21:21:38 GMT

Did you press Set when to changed the setting to “ON”? A lens without contacts is exactly what the option is for.

Re: Can't user vintage lenses on EOS M50

tempuser11293 — Tue, 03 Feb 2026 21:26:43 GMT

Oops, I didn't, thanks for the catch. It's working now, thank you so much 🙂

Re: Can't user vintage lenses on EOS M50

normadel — Wed, 04 Feb 2026 06:54:59 GMT

Something's strange. Any and every Canon EF-mount (or EF-S) lens ever made is an autofocus and auto-exposure lens. Of course it has all the same electrical circuitry and contacts as current EF/EF-S lenses.

What exactly is the lens you have?

Re: Can't user vintage lenses on EOS M50

jrhoffman75 — Wed, 04 Feb 2026 13:01:50 GMT

@normadel wrote:

Something's strange. Any and every Canon EF-mount (or EF-S) lens ever made is an autofocus and auto-exposure lens. Of course it has all the same electrical circuitry and contacts as current EF/EF-S lenses.

What exactly is the lens you have?

OP said EF lens. Not necessarily a Canon lens.