The development model shown at Canon Expo 2015 in NYC operates at ISO 100 only, and produces RAW files as big as 210MB. The model name registered in the firmware is EOS Y038. Working with such resolutions and files sizes may pose some challenges to monitors and computers used for post-processing.
The elephant in the room is the question when we will see this sensor go into production. My guess is, earlier than we may think. Though limited to ISO 100, the sensor built-in in an EOS 5Ds body is working good enough for Canon to showcase it and to let people play around with the camera. My bet is Canon will release a DSLR with such a sensor towards the end of 2017, more likely in 2018. From this perspective, the EOS 5Ds and EOS 5Ds R with their 50MP sensor were just the beginning of Canon’s raise to become the high resolution leader (again).[via PB]