EOS R6 Mark II: Error 01

[Gaby1]

I am using the Canon EF-EOS R Mount Adapter for my Sigma 150 - 600 mm lens. The AF menu defaults to MF which it doesn’t allow me to change. I suspect it’s a connection/contacts issue but it’s a brand new camera and a brand new adapter.

[Gaby1]

I think I will go to a local retailer; thanks for the suggestion.

[FloridaDrafter]

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@Gaby1 wrote:

Yes, I tried it with a Canon 70-300 mm lens, also with my brand new EF to EOS R Mount adapter; didn’t solve the issue.

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Hello, Gaby!

Sorry I'm late to the thread and I realize you probably have went to your local dealer by now. But my wife uses the R6 II and for a while, she used the EF 70-300 f/4-5.6 IS USM II Lens, so I know it works. She used the plain Canon brand adapter. So there may be other issues at play.

Newton

[Gaby1]

Thanks for that comment. Yes, maybe it’s something with the camera.

[March411]

You'll have a pretty good idea once you visit your local retailer and test a different EF/RF adapter and have a chance to mount a RF lens. 

When did you purchase the body and did you get a CarePak?

[Gaby1]

I purchased it a few weeks ago on eBay used, but “in mint condition”. I haven’t gotten the Care Package yet, I will see if I can still do that.

Thanks again for all your help.

[K_ozdragon]

Do your lenses have a AF to MF switch? If so, & it's turned to MF, the option will be greyed out in the camera menu. Make sure your camera firmware & lens firmware are all updated, along with the adapter. Using old firmware on any of the equipment can cause issues. Particularly with compatibility.

Another thing to check is the focus mode you're using. AI detection will turn off the focus option. Also, if the camera has custom settings mapped, it may turn off the menu option in the camera. This could be highly likely since your camera is used. Consider doing a factory reset on the camera to ensure there's no odd settings or remapped buttons. Or check the custom configuration settings to see if the AF to MF setting has been remapped. Honestly, a full reset would be best to get everything to default. Then make sure your firmware is all up to date.

[Gaby1]

Thank you for your suggestions- in the meantime I resolved the issue by taking my R6 to a retail store and trying out different lenses and another mount adapter: it was the brandnew Canon mount adapter I had purchased at Amazon that caused the issue.

[K_ozdragon]

Ah, that will definitely do it. It could have been firmware on the adapter, but more than likely it was a fake adapter. Amazon is unfortunately filled with counterfeit goods. It's a really big issue. They make it look like an official OEM product, but it's just a cheap $15 knock off under the hood.

Of course, it could just be a faulty adapter, but when dealing with Amazon, it can often be a counterfeit good. Either way, glad you sorted it out & got it working. Hopefully you can get a return on the Amazon adapter to get your money back. Going to a store & checking your equipment when it comes to things like adapters is a great way to quickly narrow down an issue. I'm sure you felt relieved when it began working lol.

[deebatman316]

The Canon brand adapter doesn't have firmware. All it serves is as an extension tube with electronic contacts for EF lenses that puts it at the correct distance from the image sensor. The adapter isn't converting camera body signals from RF-EF. The camera detects which lens is mounted and appropriately switches to EF Mount communication when an EF lens is used. Another rule stayaway from any online marketplaces like Amazon, Walmart and Facebook. Stick with well know and authorized dealers.

[March411]

I would agree with Demetrius that it is best to stay away from unauthorized dealers. I attached the current listing below (PDF) of Canon authorized sellers to this post but please note the last update was 8.15.25. 

That being said since you recently purchased this from Amazon you should still be eligible to make a return for defective product. Additionally, if push comes to shove Amazon does have authorized Canon sellers on their marketplace but I would always check the seller prior to making the purchase.