Originally posted by eurostar I don't think it's a silly idea.
So called "full frame" sensors are said to be able to reach, today, the quality of medium format films.
Sensors need large bayonet for the design of telecentric lenses.
Full frame digital cameras are very expensive and most of them are bought and used by professionals.
There are much more professionals that owns 645-mount Pentax lenses than k-mount ones.
So, I think a 24x36 sensor camera with 645 mount wouldn't be a silly idea.
I think that using a 24x36 sensor without gaining the lens compatitiblity of K-mount is suicide.
Also, if using a smaller than bayonet allows sensor is not stupid, the projected 645D already did that, it used a smaller sensor than 645 film format size.
It may be cool for those owning 645 lenses. But it immediately excludes anyone owning K-mount lenses the envy of upgrading...