mike kobal: Sorry, but a sensor size of 44x33mm cannot be called medium format by traditional definition.This is a APMFS-C sized sensor (Advanced Photo Medium Format System type-C)
Ignoring the what is "Small Format" vs. what is "Medium Format" debate, labeling the camera 645 is indicative of the film camera these digitals have replaced and the lenses they use.
Ian Worthington: Will people please stop moaning that the sensor is not 6x4.5? The sensor is what it is. If you want a larger one go spend the extra money on something else.
For me this makes an interesting alternative to a 5D3 at about twice the price, though it clearly can't share my existing lenses, for the same reason I don't always want to shoot with my 7D: low light iso noise and resolution.
The proof of the pudding is going to be in the lens options and their quality though.
To be fair, Medium Format is officially 4x4 through 6x9, just like Small Format is 110, 35mm etc.....
gsum: This camera isn't medium format - it is MFDX. To describe it as MF is misleading. Looks good though and is almost free of the usual useless 'features' that afflict modern cameras.
MFDX? Where did that come from? DX as in Nikon?.....except they don't have MF. The thing is almost twice the sensor size of FF and it still isn't big enough?