5D Mark II Team

Improvements & Gear

Canon aware of IRIS issue?


  • Response given by Canon
  • Comments


Canon has been contacted by many customers in the last two weeks.

One member of the Canon community received an answer from Canon Tech support after the report he/she sent regarding the issue/malfunction found in Firmware 2.0.4 (for full details of the problem please read the original Report here and the Update here).

Below is quoted part of the answer given by Canon (we keep privacy of the sender):

“Dear X,

Thank you for your patience in awaiting my response.

I have been investigating your findings for the past week and can confirm that Canon Inc are aware of this issue and are currently investigating.

I understand this occurs predominantly with the 100mm f2.8 MACRO lens.


Thank you for your understanding.

To reply to this mail please use this link:  xx

We aim to answer queries as soon as possible. Responses on average take 1 to 2 business days (or the next working day if submitting on a weekend or public holiday).

Yours sincerely,


Canon Support Centre”


We encourage Canon users who have EOS 5D Mark II and the 100mm 2.8 Macro lens or any other lens experiencing the explained malfunction to report it to Canon (contact information can be found here).

Please note that this is a Firmware issue, not a lens issue.

Not all reports sent to Canon were responded, but we sincerely hope Canon fix this issue in near future (especially since it’s not limited to “Macro” lenses) and also add some additional “very possible” functions to the next update.

Thanks in advance to everyone supporting and especially to Canon for listening to their customers.

April 12, 2010 - Posted by | Articles & Tech Info, Campaigns, News & Info, Reports | , , , , , , ,


  1. Please, would you make it more obvious how we can report this issue to the Canon Support Centre. It would help immensely.

    Comment by Robert Godfrey | April 12, 2010 | Reply

    • Sure. We added a link in the article to another post where contact information is fully detailed.

      Since we posted that information many times in the past, we didn’t realize it could help to post it again. Sorry.

      Comment by 5dmark2 | April 12, 2010 | Reply

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