What is Digital medium format camera?

Medium format cameras are generally used by professional photographers, and take film in the 2-1/4 x 3-1/4 inch or 6mm X 7mm formats. A medium format digital camera would have a digital sensor of a size that could use the lenses from cameras designed for those film sizes.

Some medium-format cameras like the Hasselblad have removable backs that can be replaced with a digital back that turns the film camera into a digital. These cameras and film backs typically have sensors from 20 Megapixels to about 50. Needless to say, both the cameras and lenses are wildly expensive. Equally needless to mention, they give incredible results, yielding images that can be enlarged to billboard size.