Canon has just released remedial firmware for their premier 4K workhorse the new EOS C300 Mark II. The latest Firmware fixes some bugs with skipped frames at certain frame rates. canon eos c300 mark ii nab Firmware Update Details from Canon:
Firmware Version incorporates the following correction: 1. Fixes a phenomenon in which there are skipped frames in footage recorded in slow motion. Affected frame rates are:
  • 4K recording at 24.00P and 23.98P
  • 2K/HD recording at 29.97P, 25.00P, 24.00P, and 23.98P
*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. The version firmware is for updating cameras with firmware version If your camera's firmware is already version, 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 details, please refer to the latest version of the instruction manual for this product, which will be released at the same time as this firmware update. Preparations for the Firmware Update: After the Firmware update has been performed, the camera's menu and custom picture settings will be reset. It is recommended that users save their menu and custom picture settings as settings data to an SD card, separate from the one that will be used to carry out the update, before starting update operations. This saved data can be loaded into the camera and the settings can be changed after the update has been completed. For further information on this, please refer to the section in the unit's Instruction Manual titled "Saving and Loading Camera Settings". The downloaded folder contains the firmware (file name: VLB1.FIM / file size: 41,353,248 bytes), and instructions on the firmware update procedures (a PDF file in five languages: Japanese, English, French, Spanish and Simplified Chinese). Before starting the firmware update operations, please be sure to carefully confirm your understanding of these instructions.
C300-Mark-II-side-600x400 The following things are required to perform this firmware update: 1. A Cinema EOS C300 Mark II camera body 2. A computer (OS: Mac OS X) OS Requirements: Mac OS X (10.7-10.11) 3. A 64 MB or higher-capacity SD/SDHC/SDXC memory card (both commercially available) 4. An SD card reader/writer (commercially available) or an SD card slot built into the computer 5. A fully charged battery pack for the camera 6. Compact power adapter bundled with the camera 7. The firmware (the downloaded file) Download the firmware directly from Canon here. Q1: Please tell me about the changes made in Firmware Version A1: 1. This firmware addresses a phenomenon in which there may be skipped frames in footage recorded in slow motion in Slow & Fast Motion Recording Mode, a mode which can be used to create a slow motion or fast motion effect during playback. Q2: How can I carry out a firmware update? A2: Please download the most recent firmware for this model from the Canon Web site and follow the procedure shown on the Web page to install it. Although we haven't come across any skipped frames in our tests, the units we have for hire have been updated to the latest firmware for piece of mind and we urge all our C300 Mark II customers to do so as well as soon as possible. To order your Canon EOS C300 Mark II head over to our website here or call our Canon Specialists at 0208 977 1222.