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JRichards2012 · ‎10-30-2024

I recently purchased a R7 with the purpose of pairing it with my Sigma 120-300mm F2.8 Sports. However it will not recognize the lens. That lens works perfectly with my adapted R6. And the R7 works just fine with other adapted Sigma lenses. Yet refuses to recognize that Sigma lens that i purchased it for. I have cleaned the lens terminals, taken the battery out of the camera, and replaced. It still will not work. I updated the firmware to 1.6.0 as well. Nothing works. Any information on this would be greatly appreciated.

ctitanic · ‎10-30-2024

We can debate all we want here but the bottom line is that there is little to nothing that can be done to help with the original question. Canon will not release a firmware to address an issue found in a 3rd party lens that was not designed to be used with a R system. Sigma most likely will not release a firmware update for an EF lens to fix an issue with a R camera. On top of that, Canon is not making any more EF cameras so there is not any insensitive for Sigma to fix anything, in the way I see this whole matter.
The only thing he can do is to use the lens in any other camera that works with that lens and forget about using it in the R7. Cruel but the reality.

Frank
Gear: Canon EOS R6 Mark I, Canon 5D Mark III, EF100-400 L II, EF70-200 f2.8 II, RF50 and few other lenses.
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shadowsports · ‎10-30-2024

🤣 I think you mean Rick and firmware for the 120-300 is available if you have a USB Dock for EF, but there is nothing for the R series if that's what you meant. I'm going to let my dock go with my last Sigma lens, a 150-600c. Waiting for it to go to a good home.

~Rick
Bay Area - CA

~R5 C (1.0.7.1) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, ~RF 200-800 +RF 1.4x TC, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8 ~CarePaks Are Worth It

March411 · ‎10-30-2024

LOL....Sorry you are correct, I did mean Rick. I am not even sure where Steve came from when responding.

The dock has been a bonus for me also, the plan is to hold onto it until (or if) my Sigma glass is replaced. Like you (posted screenshot) I didn't see anything in the firmware release to assist with compatibility with R bodies but it may be worth a shot if the OP has a dock.

Marc
Windy City

R3 ~ R5 ~ R6 Mk II ~ R50
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EOS R7 won't recognize Sigma 120-300mm F2.8