Product Notice

To Users of the EF400mm f/2.8L IS III USM and EF600mm f/4L IS III USM Interchangeable Lenses for Digital SLR
2019-MAR-18

Posted on: 18 March 2019

To Users of the EF400mm f/2.8L IS III USM and EF600mm f/4L IS III USM Interchangeable Lenses for Digital SLR


Thank you for using Canon products. 

Please be informed of the information outlined below regarding an upcoming firmware release for the EF400mm f/2.8L IS III USM and EF600mm f/4L IS III USM interchangeable lenses for digital SLR cameras.

We would like to offer our sincere apologies to users who have been inconvenienced by this issue. Going forward, we will spare no effort in our quality management to make sure our customers can use our products with confidence.

Affected Products:    
EF400mm f/2.8L IS III USM and EF600mm f/4L IS III USM

Note: The firmware which we are planning to release is for lenses equipped with firmware version 1.0.7.  The lens firmware version can be checked via the camera’s menu.

Details:    
The firmware planned for upcoming release will incorporate the following correction.

Correction:
Corrects the phenomenon whereby, during movie shooting, when attached to certain EOS digital SLR cameras*1 with the camera’s shooting mode set to M or Av mode, some exposure flicker may happen.

Note: This phenomenon doesn’t occur when shooting still images.

Workaround:
 In the interim, during movie shooting, please perform the workaround procedures below to prevent the occurrence of this phenomenon.



Condition

Extender Type

Workaround

Lens only

No extender

For movie shooting, set the camera according to options (1) or (2) listed below.
(1) In the camera’s Custom Functions, set the exposure level increments to 1/2-stop or 1-stop.
Note: The possible values that can be set vary depending on the camera model.
 (2)    Set the camera’s shooting mode to P or Tv mode.

Lens with Extender

Extender EF1.4x

For movie shooting, set the camera’s shooting mode to P or Tv mode.

 

Lens with Extender

Extender EF2x

For movie shooting, set the camera according to options (1) or (2) listed below.
(1) In the camera’s Custom Functions, set the exposure level increments to 1/2-stop or 1-stop.
Note: The possible values that can be set vary depending on the camera model.
(2) Set the camera’s shooting mode to P or Tv mode.*1

*1 EOS-1D X Mark II, EOS-1D X, EOS-1D C, EOS-1D Mark IV, EOS 5D Mark IV (Ver.1.0.2 or later), EOS 5D Mark Ⅲ, EOS 5D Mark II, EOS 5Ds, EOS 5Ds R, EOS 7D Mark II, EOS 7D, EOS 6D, EOS 80D, EOS 70D, EOS 60D, EOS 60Da, EOS 760D, EOS 750D, EOS 700D, EOS 650D, EOS 600D, EOS 550D, EOS 100D, EOS 1500D, EOS 1300D, EOS 1200D, EOS 1100D, EOS M, EOS M2 


Contact Information for Inquiries


For questions about this matter, please contact our Customer Service Hotline.

Back