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EOS cameras "ERR O1" CORRUPTING LENSES

JAYSTATON
Apprentice

I have 3 EOS cameras: 2 EOS R's, and 1 EOS R6.  All 3 are showing the error message "Err 01".  I have looked on line and people are saying it is a lens contact issue.  It is true that if you switch to a different lens, it normally fixes itself(after you have removed, then reinstalled the battery.)  

However, it started 1st on one of my EOS R's using my Canon 24-105, f4.  Then within a week, on my 2nd EOS R.  And within the 2nd week, it started effecting my EOS R6.  Then, the same thing started occurring using my Canon 24-70, f2.8.  A unique issue is that sometimes it doesn't happen when shooting at the widest aperture.  But as soon as I stop the lens down 1 stop, it occurs.

I have heard the only cure is to send the lens back for repair to fix an aperture issue.

I don't believe it is a normal prime lens issue, but rather a zoom lens issue on the new Canon EOS cameras.  I used both lenses on my older Canon 5D Mark II for several years without issue.  Then, I switch to the new EOS cameras and both lenses go bad within 2 weeks?  I don't think so.

  I have cleaned the contacts on all the cameras, on the lenses, and the lens converters. And the error message still pops up.

Has anyone else found the same issues?  Or a fix?

2 REPLIES 2

Tronhard
Authority

Hi and welcome to the forum:

To assist you it would be helpful to have some more detail:

Are the lenses you are using RF lenses or EF lenses via an adapter?

IF you are using an EF-RF adapter, what brand is it?


cheers, TREVOR

Professional photographer, engineer and educator since 1980

"All the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
"A good swordsman is more important than a good sword" Amit Kalantri
Technique will always Outlast Tech - Me

Hi Trevor.

All my lenses are EF mounts, and I am using the Canon ER-RF adapter.

I determined that the adapter wasn't the issue, since my prime lenses work fine on all 3 adapters.  Just the zoom lenses don't work.

 

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