Possible issues and resolutions If you have multiple memory cards, initialize another memory card and take some test shots. If images can be played back normally, the card that shows the error message may be malfunctioning. Try reformatting the faulty memory card to solve the issue.
2. Format the CF card. " (CF error ) is displayed on the LCD panel, it indicates that a problem with the CF card is preventing the image data from being recorded or read. Use another CF card instead.
Even though the firing of the built-in flash is disabled when [EasyWireless] is set, it will still fire a small flash to control the receiver unit. Depending on shooting conditions, the flash fired to control the receiver unit may appear in the picture .
Live/Face detection Live mode, Face+Tracking/FlexiZone-Multi AF Quick mode EOS-1D X No TTL secondary image -registration, phase detection 61 points (Up to 41 cross-type points) *1
