New Firmware for Discontinued Canons

Canon has updated firmware for both the discontinued EOS-1D Mark IV and the EOS-1Ds Mark III so that they will work correctly with the new EF 200-400 f/4L IS 1.4x lens.

Canon EOS 1D Mark IV - Version 1.1.3 enables the center AF point to autofocus when the camera is used with the EF 200-400mm F4L USM Extender 1.4X lens and an Extender, whose combined maximum aperture is f/8. Also fixes a phenomenon in which abnormal images may result when continuous shooting mode is enabled and the image size is set to “RAW” or “RAW+JPEG.

Canon EOS 1DS Mark III – Version 1.2.2 enables the center AF point to autofocus when the camera is used with the EF 200-400mm F4L USM Extender 1.4X lens and an Extender, whose combined maximum aperture is f/8.

 

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