topic Re: EF 28-70 L: Lens error in EF & RF Lenses

EF 28-70 L Error: "Communication with the device is faulty"

Cholt — Tue, 08 Oct 2024 13:23:11 GMT

Hello! I have a Mirrorless R6 with an adapter and an EF 28-70 L. It was working fine, then this error popped up…”Communication with the device is faulty. Check the camera, lens, or mount contacts.” I tried to use it with another Canon camera and it shoots 4-5 shots then the error message pops up again. I’ve cleaned it, not sure if I need to just send it in to get fixed. It’s the older model so not sure with cost of sending it in if it would be expensive. Thoughts? #lens

Re: EF 28-70 L: Lens error

Tronhard — Mon, 07 Oct 2024 03:25:25 GMT

Hi and welcome to the forum:

What brand adapter are you using to convert the lens to your R6?

Re: EF 28-70 L: Lens error

ebiggs1 — Mon, 07 Oct 2024 14:02:32 GMT

"I need to just send it in to get fixed."

Send it where? If it is an early model it probably is out of service life at Canon. Private shops may and can be able to fix it if it is a lens issue. Two things to check, the adapter and try it on a different camera preferably on a DSLR.

I generally do not recommend this but get some 92% alcohol and a q-tip and clean the contacts on the lens. Not likely to help but its easy and almost free to do.

Re: EF 28-70 L: Lens error

Cholt — Mon, 07 Oct 2024 15:25:24 GMT

Thanks for the quick response! It is a Vello adapter. I have had the same adapter since I got my mirrorless a couple of years ago. Maybe time for a new adapter? I’ll have to try that. What I really want is a new version anyways.🤷🏽‍♀️

Re: EF 28-70 L: Lens error

Cholt — Mon, 07 Oct 2024 15:26:56 GMT

Thanks for the quick response. I will try that but yes, it’s the first model. Both of my cameras are mirrorless at the moment so it’s not an option to try with a DSLR. I’ll try the alcohol….

Re: EF 28-70 L: Lens error

Cholt — Mon, 07 Oct 2024 15:27:48 GMT

Actually the adapter works fine with my other EF lens…

Re: EF 28-70 L: Lens error

Tronhard — Mon, 07 Oct 2024 16:45:07 GMT

There are documented issues with 3rd party adapters, especially with older lenses. I would always recommend using a Canon EF-RF adapter. You can get them at a reduced site from the Canon Refurbished site. The fact it works with some does not mean it will work with others. If in doubt see if you can try one at your local bricks and mortar store and if it works buy it from them in appreciation.
As my experienced colleague Ernie said, getting your lens fixed is unlikely if it is an issue with the lens itself - either for parts availability or cost-benefit.

Re: EF 28-70 L: Lens error

Cholt — Mon, 07 Oct 2024 17:52:53 GMT

Thanks so much!

Re: EF 28-70 L: Lens error

ebiggs1 — Tue, 08 Oct 2024 00:10:46 GMT

The DSLR would eliminate the adapter so it is ashame you can't do that. Is it a Canon brand adapter? If it is not it is probably the problem. Also make sure there are no filters or lens attachments, nothing, on the lens. It needs to be just the bare lens.

Re: EF 28-70 L: Lens error

Cholt — Tue, 08 Oct 2024 04:29:15 GMT

It’s not a Canon brand but I’ve had it for the last couple of years and it has worked with all of my lenses. This is the only lens I’m having a problem with. My other two EF lenses work just fine with this adapter.🤷🏽‍♀️

Re: EF 28-70 L Error: "Communication with the device is faulty"

ebiggs1 — Tue, 08 Oct 2024 14:30:30 GMT

Still it is most likely the problem. I urge you to find a DSLR to try the lens on. That will prove whether the lens has a problem or not and if not it is most definitely the off brand adapter.