Pentax hasn't ruled out a return to the medium format market. In fact, it became very aware of the demand while conducting market research for its Film Camera Project. Could a new, film-based 645 ...

Medium format film is able to achieve this because of its ... aspect ratio a camera shoots by the numbers in its model name. Pentax 645 cameras shoot in 6x4.5, while the Mamiya RB67 shoots 6x7 ...