24-70mm f2.8 - Communication between the camera and lens is faulty. Clean the lens contacts.

[jakrelphotos]

I am getting the following error with my Canon 24-70mm f2.8 lens mounted on 2 different cameras. 

"Err 1 - Communication between the camera and lens is faulty. Clean the lens contacts"

Other lenses work fine on the 2 cameras so the problem is with the 24-70mm lens. I've tried cleaning the contacts on the lens but to no avail.

I don't get the error and am able to take shots when I set the aperture to 2.8. The error occurs with all other aperture settings. Auto focus seems to work ok (contacts are ok?) so it appears that the lens aperture blades may be stuck.

Any suggestions on how to get the other aperture settings to work?

Thanks  

[Batteristafoto]

Danny! I did that the minute i bought this lens! All my gear is registered there! Canon should repair AT NO COST this faulty manufacturing which is all over YT and the internet

[jakrelphotos]

I was going to eventually drive up to the Irvine Canon Factory Service Center to repair the 24-70mm lens.  Can anyone please confirm that Canon no longer services this lens?

[jrhoffman75]

Follow what Danny says above.

You could also give the Center a call.

[bmolson]

I have this same issue but with my 24-70 tamron f2.8. It doesn’t happen when using it on my D3 body, just in the r6. It works ok when I use 2.8 but any other aperture causes the error.

[shadowsports]

Greetings,

3rd party lens compatibility is not guaranteed.  Support for 3rd party products is beyond the scope of this forum.  For best results, I suggest using Canon glass with your Canon body's.  If you are adapting EF to RF, a Canon brand adapter is recommended.  Some 3rd party lenses work better than others, some not at all.  Tamron lenses seem to work reliably with older cameras.  Some mirrorless cameras can be hit or miss.  In some cases, lens firmware if available might help.

[Shipbreaker1]

My 24-70mm L lens is not communicating with any of my canon cameras. 1DS Mark 1 or my R5. I cleaned the contacts 3 times and not working. How do I get it repaired?

[jrhoffman75]

Register your product on the Canon support site and request support. Depending on which version of lens Canon may not service. Then you could try Midwest Camera. 

[Mano-CD]

I have the same problem with the EF 24-70 mm f2.8L USM that I use most, on my Canon EOS R6 with a ring adapter. Err 1 messages most of the time. The odd thing is the camera takes the photo as set, but shows the error message after every shot. Sometimes, it does not happen. My lens is 17 years old and Canon does not accept it for repair. I live in Colombia. The last time I had to send the lens to California for repair. it cost me $500.

I tried the same lens on my Canon 5D MII. No problem. It works properly. So it is not the EF 24-70 f2.8L. I tried a 40 mm prime lens on the R6 with the same ring adapter. No problem, so it is not the Adapter. What is it then with the 24-70 f2.8 and the EOS R6. My feeling is that it is being caused by an Autofocus setting. It is difficult to nail the issue. Canon does not seem to care.

I am a Microstock photographer and the 24-70 is my workhorse. I am really frustrated and annoyed.

[deebatman316]

The problem is the lens. Older cameras can't make use of the higher communication speeds used by newer EF lenses. Newer DSLRs and RF Mount cameras use fast communication speeds. But older DSLRs can't make use of the faster speeds. I see this problem all the time when using newer lenses on older cameras. The problem is the flex cable.

[ebiggs1]

"The problem is the flex cable."

The problem may be the flex cable as it is a weak spot but not for the reason given. Unfortunately it needs service so a private repair shop is something you need to seek out.

"Canon does not seem to care."

That is not true. It is not that they don't care, Canon as any company eventually runs out of the ability to repair older gear. You will see this with any electronic device you own not just  you lens. Private shops scavenge parts from other lenses to be able to repair some of them and when that dries up repair will become impossible.

The EF 24-70mm f2.8l lens was first introduced around year 2000. Upgraded models in about 2012 so you see you are looking at a very old lens indeed.