Mamiya Leaf escalated the competition among medium format cameras by unveiling its Credo digital backs. The line uses a new range of CCD-based sensors that peak at 80 megapixels while still having 12.5 f-stops of dynamic range. A 60-megapixel, 3:4 ratio sensor is also new and promises relatively strong color and low noise in the medium format size, and an 'entry' 40-megapixel sensor can provide faster photography at up to 1.2 frames per second.
