
Ricoh published another update on the Pentax full frame DSLR camera:

Ricoh filed a patent for contrast AF by the AE sensor in order to achieve accurate AF without using live view. Additional information available at Egami (Google translation).

This is how the $7,000 Pentax 645Z medium format digital camera looks like on the inside (picture taken at the 2015 CP+ show in Japan, image credit: Morio via Petapixel). More Pentax cutaway cameras can be found here.