Canon EF 600mm f$ Mkii playing up

[Mikehit]

I am using a EF Canon 600mm f4 Mkii and it has recently started playing up when it is on my R5ii.
When I first put the lens on the camera (or first turn it on), everything look good but it wont autofocus and the menus wont come up when I press the 'menu' button. If I press the lens release button and rotate the camera then twist is back into position, everything is absolutely fine. This is the case whether I use the lens-adapter lens release or the adapter-lens release.
At first I thought it could be a software thing so I update to firmware 1.2.0 but this has not solved the problem.
I have tried cleaning the contacts but no luck there.

I have called CPS but the lens is now out of service life so they will not touch it.
Does anyone have any suggestions?
I am living in the UK -does anyone know of any reputable third party repairers who may be able to help? (my favourite is H Lehmann in Stoke-on-Trent but I have not been able to contact them - maybe they have stopped trading)

 

[AlanF]

I am using a EF Canon 600mm f4 Mkii and it has recently started playing up when it is on my R5ii.
When I first put the lens on the camera (or first turn it on), everything look good but it wont autofocus and the menus wont come up when I press the 'menu' button. If I press the lens release button and rotate the camera then twist is back into position, everything is absolutely fine. This is the case whether I use the lens-adapter lens release or the adapter-lens release.
At first I thought it could be a software thing so I update to firmware 1.2.0 but this has not solved the problem.
I have tried cleaning the contacts but no luck there.

I have called CPS but the lens is now out of service life so they will not touch it.
Does anyone have any suggestions?
I am living in the UK -does anyone know of any reputable third party repairers who may be able to help? (my favourite is H Lehmann in Stoke-on-Trent but I have not been able to contact them - maybe they have stopped trading)

Unfortunately, Lehmann has ceased trading. I asked gemini google for names of independent repairers and it came up with too many to paste in here.

 

[Mikehit]

Unfortunately, Lehmann has ceased trading. I asked gemini google for names of independent repairers and it came up with too many to paste in here.

Thank you Alan. I guess it is down to the trawl and a bit of luck....

 

[AlanF]

Thank you Alan. I guess it is down to the trawl and a bit of luck....

I hope you will find someone. The 600/4 ii is too good, too new and still too expensive to write off. Of the ones suggested by Gemini, these were top of the list:

• Fixation (London): One of the most famous names in the UK. Though now part of Wex Photo Video, they operate as a specialist workshop for Nikon, Canon, and Sony. They offer sensor cleaning, lens calibration, and "while-you-wait" services.1
• A.J. Johnstone (Glasgow): A highly regarded repairer in Scotland with nationwide postal services.2 They are an authorised repair agent for several major brands like Canon and Nikon.
• DKAVS (Horley, Surrey): An authorised service centre for Panasonic (Lumix), Sony, and others.4 They are known for being one of the few places capable of handling complex electronic repairs on modern digital bodies.
• Camera Repair Direct (Surrey): A digital specialist with over 30 years of experience, known for fast turnaround times on DSLRs and compact cameras.
  
  

---

​

 

[Mikehit]

I hope you will find someone. The 600/4 ii is too good, too new and still too expensive to write off. Of the ones suggested by Gemini, these were top of the list:

• Fixation (London): One of the most famous names in the UK. Though now part of Wex Photo Video, they operate as a specialist workshop for Nikon, Canon, and Sony. They offer sensor cleaning, lens calibration, and "while-you-wait" services.1
• A.J. Johnstone (Glasgow): A highly regarded repairer in Scotland with nationwide postal services.2 They are an authorised repair agent for several major brands like Canon and Nikon.
• DKAVS (Horley, Surrey): An authorised service centre for Panasonic (Lumix), Sony, and others.4 They are known for being one of the few places capable of handling complex electronic repairs on modern digital bodies.
• Camera Repair Direct (Surrey): A digital specialist with over 30 years of experience, known for fast turnaround times on DSLRs and compact cameras.
  

---

​

Helpful as ever....you're a star! I'll give them a go.