Hi Tim, I could be wrong but I thought the BMCC records to it’s own SSD internal drive with a higher resolution then the supported resolutions of the Atomos Ronin supports.
Supported Formats: In/Out for Atomos Ronin
HD 1080i60, 1080i59.94, 1080i50, 1080p30, 1080p25, 1080p24, 1080p23.98, 1080pSF23.98, 1080pSF24, 1080pSF25, 1080pSF30, 720p60, 720p59.94, 720p50, SD 480i, 486i, 576i
Records 4K (3840×2160) & HD (1920×1080) for the BMCC
In less you mean the one with the 2.5K Image Sensor. The 2.5k camera records 12-bit RAW, ProRes and DNxHD Formats to it’s own SSD.
I am thinking of getting the 4k BMCC. I mostly shoot weddings and not sure if BMCC would be good for that kind of work.
So I do not see a need to use the Atomos Ronin with that camera. Let me know if I am wrong.
Paul