According to SAR‘s sources, the Sony medium format camera will be in very compact sizes just like the digital Mamiya 7, medium-format rangefinder system camera which was introduced in 1995. The upcoming Medium Format model should look better and smaller.
Sony Medium Format RX-style Camera Could Be Mirrorless
This also means the camera is definitely a mirrorless shooter and probably has a built-in EVF. No more specs detailed yet. But as we posted earlier it will use the same 50MP medium format sensor which measures 44 x 33mm.
Official announcement for the Sony branded medium format camera expected to in the next 5-6 months.