Users of the Canon EOS C300 Mark III and C500 Mark II had to wait a bit longer for the announced firmware versions than C70 users, but now the corresponding downloads are also available for them. What the 
larger updates bring everything in innovations, we had already partly explained, here again in the fast run:
Canon EOS C300 Mark III
Both cameras get support for the IP-based XC protocol for remote control in live productions. Simultaneous 2K and FHD output via the 12G-SDI interface is now supported for internal recording of 5.9K RAW or 4K/UHD, and simultaneous output via monitor and HDMI output (1920×1080p/i) is also possible. The ITU BT.709 Standard Gamma option is added, with the CP file "BT.709 Standard" assigned to the Custom Picture settings. Compatibility with Look files or 3D LUTs is new, as is a 1.8x de-squeeze option for anamorphic shots.
Smaller improvements include a new power-saving mode, the[2x] option in the magnification function, the[Mask 100%] option in[Aspect Marker]. Further, the capture settings are said to be preserved when the sensor mode is changed.
The C500 Mark II also gets the ability to also record in 4:3 and 6:5 aspect ratios while in full-frame sensor mode with Cinema RAW Light as another option for anamorphic shooting.
The update for the C300 Mark III in turn includes the new ability to change MON.OUT/HDMI output from 59.94P to 29.97P (or 23.98P), a "same file name" option when simultaneously recording XF-AVC or Cinema RAW Light, and "B&W during Magn." as an option in the Assistance Function menu.
Click here to go to firmware version 1.0.1.1 for the EOS C300 Mark III or to firmware version 1.0.3.1 for the EOS C500 Mark II
Canon EOS C500 Mark II
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