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From Canon USA:
 
Firmware Version 1.0.1 incorporates the following fixes:
 

• Fixes a phenomenon in which some images captured with the Adobe RGB color space may not successfully transfer to a smartphone.
• Fixes a phenomenon in which some JPEG images, that were converted from RAW images may not successfully transfer to a smartphone.

Download: Canon EOS M50 Firwmare v.1.0.1

From Canon USA:
 
Firmware Version 1.0.4 incorporates the following fixes:
 

• Corrects a phenomenon in which in rare instances, the operation buttons and some touch panel functions do not respond.

Download: Canon EOS 6D Mark II Firmware v.1.0.4

From Canon:
 
Canon EOS C200/C200B
 
Firmware Version 1.0.4.1.00 incorporates the following fixes and enhancements:
 

• Fixes image quality degradation, such as color misalignment or edge distortion, may occur in the recorded footage when using the following combination of settings:
• recording format XF-AVC
• frame rate 59.94i / 50.00i
• 1920x1080 resolution
• Optimizes the [Black Gamma] compensation when [Normal 1] to [Normal 4] is set for [Gamma] in the Custom Picture settings.
• Optimizes color accuracy in areas of high brightness when [Normal 1] to [Normal 4] is set for [Gamma] in the Custom Picture settings.

Caution:
 

• You cannot perform the firmware update using CFast 2.0 cards. Please use a commercially available SD/SDHC/SDXC memory card that is 128MB or more for the firmware update.
• Firmware version 1.0.4.1.00 is for updating Cinema EOS C200 cameras running firmware version 1.0.0.1.00 - 1.0.3.1.00. If your camera's firmware is already version 1.0.4.1.00, it is not necessary to update the firmware. Once the camera is updated to the latest version, it cannot be restored to a previous version.

Download: Canon EOS C200/C200B Firmware v.1.0.4.1.00

From Canon USA:
 
Thank you for using Canon products.
 
We have determined that some units of the EF 200-400mm f/4L IS USM Ext. 1.4x interchangeable lens for digital SLR and mirrorless cameras exhibit a phenomenon in which the focus may not be achieved during AF shooting. Firmware which addresses this phenomenon is available for download below.
 
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.
 
Phenomenon
 
When using this lens with some camera models* and performing AF shooting from approximately 3m, the subject may not be in focus in some occasions.
 
* Camera models: EOS-1D X Mark II, EOS-1D X, EOS-1D C, EOS 5Ds, EOS 5Ds R, EOS 5D Mark IV, EOS 5D Mark III
 
Affected Products
 

• Canon EF 200-400mm f/4L IS USM Extender 1.4x lenses with Firmware Version 1.0.0

Support
 
Download Firmware Version 1.1.0 for the EF 200-400mm f/4L IS USM Extender 1.4x
 
Customers who own one of the affected camera models above, or one of the cameras** that can be used for the lens’ firmware update can download the latest firmware version and then perform the lens’ firmware update using the camera.
 
** EOS-1D X Mark II, EOS-1D X, EOS-1D C, EOS 5Ds, EOS 5DsR, EOS 5D Mark IV, EOS 5D Mark III, EOS 6D Mark II, EOS 6D, EOS 7D Mark II, EOS 80D, EOS 70D, EOS Kiss X9i, EOS Kiss X9, EOS Kiss X8i, EOS Kiss X7i, EOS Kiss X7, EOS Kiss X6i, EOS M6, EOS M5, EOS M3, EOS M2, EOS M, EOS M100, EOS M50, EOS M10. Please note that EOS M camera models require an adapter EF-EOS M to connect to the EF 200-400mm f/4L IS USM Extender 1.4x lens.
 
If you have not already done so, please register your Canon Product. By registering, we will be able to notify you via email about future announcements.
 
This information is for residents of the United States and its five territories only. If you do not reside in the USA or its five territories, please contact the Canon Customer Support Center in your region.
 
Thank you,
Customer Support Operations
Canon U.S.A., Inc

Canon has released firmware updates for several of its video cameras.
 
Canon EOS C300 Mark II / C300 Mark II PL Firmware v.1.1.1.1.00
 
Firmware Version 1.1.1.1.00 incorporates the following enhancements:
 

• Retrieval of lens metadata, such as focal length, is now supported during XF-AVC recording.
• Sensitivity adjustment has been added for the LM-V1 LCD Monitor.
• Auto IRIS support has been added for the following lenses:
• EF-S 35mm f/2.8 Macro IS STM
• EF 85mm f/1.4L IS USM
• Fixed a phenomenon in which the CFast card recording and/or REC OUT terminal output footage may be momentarily distorted when the shooting frame rate is set to 120fps in the [Slow & Fast Motion (crop)] recording mode on cameras running Firmware Version 1.0.8.1.00 or later.

Caution:
 

• You cannot perform the firmware update using CFast 2.0 cards. Please use a commercially available SD/SDHC/SDXC memory card that is 64MB or more for the firmware update.
• Firmware version 1.1.1.1.00 is for updating Cinema EOS C300 Mark II cameras running firmware version 1.0.0.1.00 - 1.1.0.1.00. If your camera's firmware is already version 1.1.1.1.00, it is not necessary to update the firmware. Once the camera is updated to the latest version, it cannot be restored to a previous version.
• For further information, please refer to the latest version of the camera’s Instruction Manual that is released with the firmware update.

Download: Canon EOS C300 Mark II / C300 Mark II PL Firmware v.1.1.1.1.00
 

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Canon EOS C200 / EOS C200B Firmware v.1.0.3.1.00
 
Firmware Version 1.0.3.1.00 incorporates the following enhancements:
 

• XF-AVC format recording has been added*1*2*3*4.
• Retrieval of lens metadata, such as focal length, is now supported during XF-AVC recording.
• Hybrid Log Gamma HDR ITU-R BT.2100 output has been added.
• Sensitivity adjustment has been added for the LM-V1 LCD Monitor.
• LPCM 24-bit audio recording has been added when recording in the Cinema RAW Light format*5.
• 4X magnification has been added.
• A PsF output function from SDI and HDMI has been added during progressive internal recording.
• A digital tele-converter function has been added (1.5x, 3.0x, and 6.0x).
• Auto IRIS support has been added for the following lenses
• EF-S 35mm f/2.8 Macro IS STM
• EF 85mm f/1.4L IS USM
• Peripheral illumination/chromatic aberration correction has been added for the following lenses
• EF 70-300mm f/4-5.6 IS II USM
• EF 16-35mm f/2.8L III USM
• EF-S 18-55mm f/4-5.6 IS STM
• EF-S 35mm f/2.8 Macro IS STM
• EF 85mm f/1.4L IS USM
• The reproducibility of bright areas has been enhanced when the gamma setting is from Normal 1 to 4.
• Browser remote setting options are retained after switching off the camera.

*1 Please use the following software applications:

• Canon XF Utility 3.3 for Windows/macOS
• Canon XF Plugin 3.3 for Avid Media Access (Windows/macOS)

*2 You will need to format the SD cards completely with the camera before recording.
*3 For detailed information about SD cards that have been verified to work with this camera, please visit Canon's Web site.
*4 Canon has verified that clips shot with this firmware version can be imported directly intoApple’s Final Cut Pro X version 10.4.1.
*5 Please use the following software applications:

• Cinema RAW Development 2.2 for Windows/macOS
• Canon RAW Plugin 2.1 for Avid Media Access (Windows/macOS)
• Canon RAW Plugin 1.1 for Final Cut Pro X

Caution
 

• You cannot perform the firmware update using CFast 2.0 cards. Please use a commercially available SD/SDHC/SDXC memory card that is 64MB or more for the firmware update.
• Firmware version 1.0.3.1.00 is for updating Cinema EOS C200 cameras running firmware version 1.0.0.1.00-1.0.2.1.00. If your camera's firmware is already version 1.0.3.1.00, it is not necessary to update the firmware. Once the camera is updated to the latest version, it cannot be restored to a previous version.

Download: Canon EOS C200 / EOS C200B Firmware v.1.0.3.1.00
 

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Canon XF405 / XF400 Firmware v.1.0.1.0
 
Firmware Version 1.0.1.0 incorporates the following enhancements:
 

• XF-AVC format recording has been added *1* 2* 3* 4.
• The flicker reduction function has been added
• Enhances menu operations so that the Browser Remote setting options are retained after switching off the camera.

*1 Please use the following software applications:

• Canon XF Utility 3.3 for Windows/macOS
• Canon XF Plugin 3.3 for Avid Media Access (Windows/macOS)

*2 You will need to format the SD cards completely with the camera before recording.
*3 For detailed information about SD cards that have been verified to work with this camera, please visit Canon's Web site.
*4 Canon has verified that clips shot with this firmware version can be imported directly intoApple’s Final Cut Pro X version 10.4.1.
 
Caution:
 

• Please use a commercially available SD/SDHC/SDXC memory card that is 64MB or more for the firmware update.
• Firmware Version 1.0.1.0 is for XF405/XF400 camcorders with Firmware Version 1.0.0.x. If your camcorder's firmware is already Version 1.0.1.x, it is not necessary to update the firmware. Once the camcorder is updated to the latest version, it cannot be restored to a previous version.
• In the detail, Please refer to the latest user's manual that we will release at the same time of firmware release.

Download: Canon XF405 / XF400 Firmware v.1.0.1.0
 

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Canon VIXIA GX10 Firmware v.1.0.1.0
 
Firmware Version 1.0.1.0 incorporates the following enhancements:
 

• The flicker reduction function has been added.
• Enhances menu operations so that the Browser Remote setting options are retained after switching off the camera.

Caution
 

• Please use a commercially available SD/SDHC/SDXC memory card that is 64MB or more for the firmware update.
• Firmware Version 1.0.1.0 is for VIXIA/LEGRIA GX10 camcorders with Firmware Version 1.0.0.0. If your camcorder's firmware is already Version 1.0.1.0, it is not necessary to update the firmware. Once the camcorder is updated to the latest version, it cannot be restored to a previous version.
• In the detail, Please refer to the latest user's manual that we will release at the same time of firmware release.

Download: Canon VIXIA GX10 Firmware v.1.0.1.0
 
B&H carries the following products:
 

• Canon EOS C300 Mark II
• Canon EOS C300 Mark II PL
• Canon EOS C200
• Canon EOS C200B
• Canon XF405
• Canon XF400
• Canon VIXIA GX10

From Canon USA:
 
Firmware Version 1.1.2 incorporates the following improvements and fixes:
 

• Support has been added for chromatic aberration correction, peripheral illumination correction, distortion correction, and Digital Lens Optimizer when using Digital Photo Professional to process RAW images captured with the following TS-E lenses: TS-E 17mm f/4L, TS-E 24mm f/3.5L II, TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Fixes a phenomenon in which standard exposure may not be obtained, or an irregular exposure may result, when Silent LV (Live View) shooting with the following TS-E lenses: TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Support for Exif 2.31 has been added.
• Fixes a phenomenon in which the camera may not function normally when using the Camera Connect application to shoot a high frame rate movie.
• Fixes a phenomenon in which error 80 may occur when HDR movies are shot using the Remote Live View Shooting function. (Applies only to Canon Log-supported cameras.)

Note:
 

1. Once the EOS 5D Mark IV is updated to Version 1.1.0 (or later), it cannot be restored to a previous firmware version (Version 1.0.1 to 1.0.4).
   
2. Cameras running Firmware Version 1.1.0 are cameras that have received the charged upgrade service to support Canon log at a Canon service center. Canon Log support will not be affected on cameras running Firmware Version 1.1.0 that are updated to Firmware Version 1.1.2 being released this time. For cameras running Firmware Version 1.0.4 or earlier, even if the firmware is updated to Version 1.1.2, Canon Log will not be supported. Users who wish to have their camera support Canon Log are asked to make a request for the charged upgrade service at a Canon service center.
   
3. When using Version 4.7.10 (or earlier) of Digital Photo Professional to edit JPEG/RAW images captured with a camera updated to Firmware Version 1.1.2 (or later), some of the Exif data may be deleted. In addition, chromatic aberration correction, peripheral illumination correction, distortion correction, and Digital Lens Optimizer cannot be used when processing RAW images captured using a TS-E lens (TS-E17mm f/4L, TS-E24mm f/3.5L II, TS-E50mm f/2.8L Macro, TS-E90mm f/2.8L Macro, or TS-E135mm f/4L Macro). Please be sure to update Digital Photo Professional to Version 4.7.20 (or later) before performing image processing.

Download: Canon EOS 5D Mark IV Firmware v1.1.2

Canon has released a firmware update for the EOS-1D X Mark II. [thanks Scott]
 
From Canon USA:
 
Firmware Version 1.1.6 incorporate the following fix:
 

• Fixes a phenomenon in which the camera may not function normally when images are simultaneously displayed on the camera’s LCD monitor and an external monitor (via HDMI output).

Download: Canon EOS-1D X Mark II Firmware v.1.1.6

Canon is apparently releasing firmware updates for several its Cinema cameras; unfortunately, the udpates aren't available just yet at Canon USA (but I expect they will be soon). To read about the firmware updates, check out this article on the Canon Digital Learning Center.
 
Listed below are the notable changes.
 
EOS C300 Mark II / C300 Mark II PL v.1.1.1.1.00
 

• Touch-Panel Sensitivity Adjustment
• Lens Metadata Information (XF-AVC)
• Auto Iris support has been added for the following lenses:
• EF-S 35mm f/2.8 Macro IS STM
• EF-85mm f/1.4L IS USM

EOS C200 / EOS C200B v.1.0.3.1.00
 

• MXF (XF-AVC) Support
• Progressive Segmented Frame Support
• Magnification Support (4x Recording)
• 24-bit LPCM Audio Support in Cinema RAW Light
• Digital Tele-Converter (1.5x, 3.0x, 6.0x)
• HLG (Hybrid Log Gamma) Support (Output Only)
• Lens Metadata Information (XF-AVC)
• Touch-Panel Sensitivity Adjustment
• Auto Iris support has been added for the following lenses:
• EF-S 35mm f/2.8 Macro IS STM
• EF 85mm f/1.4L IS USM
• Correction for Peripheral Illumination and Chromatic Aberration for the following lenses:
• EF 70-300mm f/4-5.6 IS II USM
• EF 16-35mm f/2.8L III USM
• EF-S 18-55mm f/4-5.6 IS STM
• EF-S 35mm f/2.8 Macro IS STM
• EF 85mm f/1.4L IS USM
• Enhancements
• The image reproducibility in bright areas has been enhanced when the gamma setting is from Normal 1 to 4.
• Enhances menu operations so that the Browser Remote setting options are retained after switching off the camera.

XF405 / XF400 v.1.0.1.0.00
 

• MXF (XF-AVC) Support
• Flicker Reduction

EOS C700 / EOS C700 PL / EOS C700 GS PL v.1.0.5.1.00
 

• Super 16mm (2K Crop) Recording Mode Added
• RAW Recorder Voltage Indicator
• Lens Metadata Information (XF-AVC)
• Metadata (Model distinction metadata of C700 GS PL has been added)
• Saved Settings Fix

Canon USA has released firmware updates for the following lenses to enable support for the Dual Sensing IS function found in the EOS M50.
 

• EF-M 15-45mm f/3.5-6.3 IS STM (download firmware v.3.0.1)
• EF-M 18-150mm f/3.5-6.3 IS STM (download firmware v.2.0.1)
• EF-M 55-200mm f/4.5-6.3 IS STM (download firmware v.2.0.0)

B&H has the Canon EOS M50 available for preorder.

From Canon USA:
 
Thank you for using Canon products.
 
Firmware Version 1.4.1 incorporates the following improvements and fixes:
 

• Changes the maximum number of “Release cycles” displayed from 1,000,000 cycles to 9,999,000 cycles. This value can be checked under the “Camera system information” menu.
• Fixes a phenomenon in which a synchronization failure may occur during multiple flash shooting.
• Fixes a phenomenon in which Error 80 occurs depending on the shutter release timing.

Firmware Version 1.4.1 includes all improvements and fixes provided in previous firmware versions.
 
Support
 
Canon USA will perform this Firmware Update on the EOS-1D C Cinema EOS Camera free of charge. Shipping and handling charges may apply. Please contact the Canon Customer Support Center for details.
 
This information is for residents of the United States and Puerto Rico only. If you do not reside in the USA or Puerto Rico, please contact the Canon Customer Support Center in your region.
 
Please register the EOS-1D C. By registering, we will be able to notify you via email when future Firmware Updates become available for download. If you already registered, please ensure you are opted-in to receive the notification.
 
Thank you,
Customer Support Operations
Canon U.S.A., Inc.

From Canon USA:
 
Canon Cinema EOS C100 & EOS C300
 
Cinema EOS C100 (with the Dual Pixel CMOS AF Feature Upgrade applied) Firmware Version 2.0.9.1.00 and EOS C300 (with the Dual Pixel CMOS AF Feature Upgrade applied) Firmware Version 2.1.9.1.00 incorporates the following corrections:
 

• When CN-E70-200mm T4.4 L IS KAS S is attached the following features are enabled:
• Autofocus using the Dual Pixel CMOS AF function
• The joystick on the camera's grip unit can be set to operate the zoom.
• Manual control of the iris with Camera's Control dial.
• Control of focus, zoom and iris using the separately-sold Remote Controller RC-V100.
• Automatic aperture and push auto iris functions.
• Start/stop recording on the separately-sold lens grip ZSG-C10.
• Retrieval of Lens metadata, such as the model name and the focal distance will display on the camera.
• When the camera is turned off the IS mechanical lock will be active regardless of the position of the switch.
• Adds peripheral illumination correction for the following lenses:
• CN-E70-200mm T4.4 L IS KAS S
• EF 70-300mm f/4-5.6 IS II USM
• EF 16-35mm f/2.8L III USM
• EF-S 18-55mm f/4-5.6 IS STM
• EF-S 35mm f/2.8 Macro IS STM
• EF 85mm f/1.4L IS USM

Download:
Canon Cinema EOS C100 (with the Dual Pixel CMOS AF Feature Upgrade applied) Firmware Version 2.0.9.1.00
Canon EOS C300 (with the Dual Pixel CMOS AF Feature Upgrade applied) Firmware Version 2.1.9.1.00
 

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Canon EOS C300 Mark II
 
Canon Digital Cinema Camera EOS C300 Mark II / EOS C300 Mark II PL Firmware Version 1.1.0.1.00 incorporates the following fixes and enhancements:

• Support for LCD monitor LM-V1*1,2 (separately sold) has been added.
• Peripheral illumination/chromatic aberration correction has been added for the following lenses:
• EF-S 18-55mm f/4-5.6 IS STM
• EF-S 35mm f/2.8 Macro IS STM
• EF 85mm f/1.4L IS USM

Download: Canon Digital Cinema Camera EOS C300 Mark II Firmware Version 1.1.0.1.00
 

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Canon ME200S-SH
 
Canon ME200S-SH Firmware Version 1.0.2.1.00 incorporates the following enhancements:

• The following features are enabled for the CN-E70-200mm T4.4 L IS KAS S:
• Autofocus using the Dual Pixel CMOS AF function.
• Displaying the model name of the lens when attached.
• Support for Peripheral illumination correction.
• Manual control of the iris with camera's joystick.
• Control of focus, zoom and iris using the separately-sold Remote Controller RC-V100.
• Automatic aperture and push auto iris functions.
• Start/stop recording on the separately-sold lens grip ZSG-C10.
• Adds Peripheral Illumination Correction for the following lenses:
• EF 70-300mm f/4-5.6 IS II USM
• EF 16-35mm f/2.8L III USM
• EF-S 35mm f/2.8 Macro IS STM
• EF 85mm f/1.4L IS USM
• Adds [NU protocol] to the other functions setting:
• [Other Functions] > [REMOTE B Term.] > [NU Protocol]
• When the camera is turned off the IS mechanical lock will be active regardless of the position of the switch.

Download: Canon ME200S-SH Firmware Version 1.0.2.1.00
 
B&H carries the Canon EOS C100, Canon EOS C300, Canon EOS C300 Mark II and ME200S-SH.

Canon has issued a product advisory for the EOS 5D Mark IV to alert customers of a delay in the release of a firmware update.
 
From Canon USA:
 
We would like to inform you that release of firmware to enhance functions of the EOS 5D Mark IV, which was originally scheduled for November 29 at the same timing as the firmware updates for six other models (EOS-1D X Mark II: Ver.1.1.4; EOS-1D X: Ver.2.1.0; EOS 5D Mark III: Ver.1.3.5; EOS 5DS: Ver.1.1.2; EOS 5DS R: Ver.1.1.2; EOS 6D Ver. 1.1.8), has been postponed until late February 2018 for reasons related to firmware preparation. We would like to offer our sincere apologies to users of this product who have been inconvenienced.
 
In the firmware to enhance functions of the EOS 5D Mark IV, we are planning to incorporate the following enhancements:
 

• Support will be added for chromatic aberration correction, peripheral illumination correction, distortion correction, and Digital Lens Optimizer when using Digital Photo Professional to process RAW images captured with the following TS-E lenses: TS-E 17mm f/4L, TS-E 24mm f/3.5L II, TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Support will be added to fix a phenomenon* in which standard exposure may not be obtained, or an irregular exposure may result, when Silent LV (Live View) shooting with the following TS-E lenses: TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Support for Exif 2.31 will be added.

*This phenomenon occurs when tilt or shift is applied on a TS-E lens (TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO) during LV shooting when Silent LV shooting is set (set to Mode 1 or Mode 2 on the menu). For this reason, until the firmware update, when performing viewfinder shooting or LV shooting, please shoot with the Silent LV shooting set to [Disable].

From Canon USA:
 
Canon EOS-1D X
 
Firmware Version 2.1.0 incorporates the following improvement and fixes:
 

• Fixes a phenomenon in which standard exposure may not be obtained, or an irregular exposure may result, when Silent LV (Live View) shooting with the following TS-E lenses: TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Changes the maximum number of "Release cycles" displayed from 1,000,000 cycles to 9,999,000 cycles. This value can be checked under the "Camera system information" menu.
• Fixes a phenomenon in which a synchronization failure may occur during multiple flash shooting.
• Fixes a phenomenon in which Error 80 occurs depending on the shutter release timing.

Download: Canon EOS-1D X Firmware v.2.1.0
 

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Canon EOS 6D
 
Firmware Version 1.1.8 incorporates the following fix:
 

• Fixes a phenomenon in which standard exposure may not be obtained, or an irregular exposure may result, when Silent LV (Live View) shooting with the following TS-E lenses: TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.

Download: Canon EOS 6D Firmware v.1.1.8

From Canon USA:
 
Canon EOS-1D X Mark II
 
Firmware Version 1.1.4 incorporates the following improvements and fix:
 

• Support has been added for chromatic aberration correction, peripheral illumination correction, distortion correction, and Digital Lens Optimizer when using Digital Photo Professional to process RAW images captured with the following TS-E lenses: TS-E 17mm f/4L, TS-E 24mm f/3.5L II, TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Fixes a phenomenon in which standard exposure may not be obtained, or an irregular exposure may result, when Silent LV (Live View) shooting with the following TS-E lenses: TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Support for Exif 2.31 has been added.

Download: Canon EOS-1D X Mark II Firmware v.1.1.4
 

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Canon EOS 5D Mark III
 
Firmware Version 1.3.5 incorporates the following fix:
 

• Fixes a phenomenon in which standard exposure may not be obtained, or an irregular exposure may result, when Silent LV (Live View) shooting with the following TS-E lenses: TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.

Download: Canon EOS 5D Mark III Firmware v.1.3.5

From Canon USA:
 
Firmware Version 1.1.2 incorporates the following improvements and fix:
 

• Support has been added for chromatic aberration correction, peripheral illumination correction, distortion correction, and Digital Lens Optimizer when using Digital Photo Professional to process RAW images captured with the following TS-E lenses: TS-E 17mm f/4L, TS-E 24mm f/3.5L II, TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Fixes a phenomenon in which standard exposure may not be obtained, or an irregular exposure may result, when Silent LV (Live View) shooting with the following TS-E lenses: TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
• Support for Exif 2.31 has been added.

Download:
Canon EOS 5Ds Firmware v1.1.2
Canon EOS 5Ds R Firmware v1.1.2