Hey folks,
I'm going slightly crazy here and need to know if anyone else has run into this specific issue.
The Problem:My Sigma 120-300mm f/2.8 DG OS HSM Sports (EF mount) is completely dead on my Canon R7. I get "Err 01" and literally nothing works - no AF, no aperture control, no IS, no manual focus assist, can't even take a photo. It's like the camera doesn't recognize the lens at all.
Here's where it gets weird:I did systematic testing with all my gear to isolate the problem:
Bodies I tested:
Adapters:
All my Sigma lenses (EF mount, latest firmware via USB Dock):
Test Results:
R6: ALL lenses work perfectly with ALL adapters
RP: ALL lenses work perfectly with ALL adapters
R7: ALL lenses work with ALL adapters... EXCEPT the 120-300 Sport
The issue occurs regardless of which adapter I use on the R7 (tried all three).
What I've already done:
So here I am:
Has anyone else experienced this? Is there some voodoo firmware version that works? Am I the only person on the planet with this combo?
I'm genuinely baffled because logically, if it was a general R7/Sigma issue, my other Sigma lenses wouldn't work. If it was the 120-300 being broken, it wouldn't work on the R6.
Any insights would be super appreciated before I resign myself to using the R6 for this lens (which kinda defeats the purpose of having the R7's crop sensor for wildlife).
Cheers!
I'm going slightly crazy here and need to know if anyone else has run into this specific issue.
The Problem:My Sigma 120-300mm f/2.8 DG OS HSM Sports (EF mount) is completely dead on my Canon R7. I get "Err 01" and literally nothing works - no AF, no aperture control, no IS, no manual focus assist, can't even take a photo. It's like the camera doesn't recognize the lens at all.
Here's where it gets weird:I did systematic testing with all my gear to isolate the problem:
Bodies I tested:
- Canon R6 (latest firmware)
- Canon R7 (latest firmware 1.7.1)
- Canon RP (IR converted, latest firmware)
Adapters:
- Canon EF-RF with control ring (genuine)
- Meike EF-RF with control ring
- Meike EF-RF with drop-in filter
All my Sigma lenses (EF mount, latest firmware via USB Dock):
- 24mm f/1.4 Art
- 50mm f/1.4 Art
- 12-24mm f/4 Art
- 24-105mm f/4 Art
- 150-600mm Contemporary
- 120-300mm f/2.8 Sport ← the problem child
Test Results:
R6: ALL lenses work perfectly with ALL adapters RP: ALL lenses work perfectly with ALL adapters R7: ALL lenses work with ALL adapters... EXCEPT the 120-300 SportThe issue occurs regardless of which adapter I use on the R7 (tried all three).
What I've already done:
- Updated everything to latest firmware (R7, lens via Sigma USB Dock)
- Cleaned all contacts multiple times
- Contacted Canon → "No support for third-party lenses"
- Contacted Sigma → "No known issues with this combination" (seriously?!)
So here I am:
- The lens works perfectly on R6 and RP
- Every other Sigma lens (including my 150-600 Contemporary) works fine on the R7
- Only this specific combination (R7 + 120-300 Sport) fails completely
Has anyone else experienced this? Is there some voodoo firmware version that works? Am I the only person on the planet with this combo?
I'm genuinely baffled because logically, if it was a general R7/Sigma issue, my other Sigma lenses wouldn't work. If it was the 120-300 being broken, it wouldn't work on the R6.
Any insights would be super appreciated before I resign myself to using the R6 for this lens (which kinda defeats the purpose of having the R7's crop sensor for wildlife).
Cheers!
