Canon has released a new firmware update for the EOS C100 and C300 cinema camcorder cameras few days ago. Now according to Canon Advisory, Canon C300 firmware discontinued because of the color discrepancies.
You can see the details below. For more information about what the firmware includes, see the original post here.
Canon Suspends Downloading of New C300 Firmware
We have suspended download services for Firmware Version 22.214.171.124.00 that was posted Tuesday November 12, 2013 at 8PM EST, because it has been determined that discrepancies in color balance can occur with footage captured by the EOS C300 and EOS C300PL running Firmware Version 126.96.36.199.00.
We are currently preparing new firmware with a fix for this issue and will release it as soon as it is available.
We are very sorry for the inconvenience, but we ask for your patience during this time.
We are preparing new firmware with a fix for this issue. If you have updated your EOS C300 or EOS C300PL firmware to version 188.8.131.52.00, Canon will restore the camera’s firmware version to 184.108.40.206.00 for any EOS C300 or EOS C300PL camera running firmware version 220.127.116.11.00. Please contact the Canon Customer Support Center in your region for further details.