Digital cinema cameras with sensors larger than full-frame, based on 65mm film standards. Leading cameras include Alexa 65, Blackmagic URSA 65, and Fujifilm Eterna.
Medium Format Cinema refers to the use of cameras and lenses whose sensors are significantly larger than the full-frame format (24x36mm). The term originates from photography, where medium format describes 6x6, 6x7, or 645 negative sizes on 120 film. In cinema, the format existed as 65mm film — Christopher Nolan's IMAX shoots and VistaVision productions have utilized it for decades.
The Naming Confusion
In cinematography, full-frame is now often called "large format" — even though it's smaller than medium format in the photographic world. Cameras like the Alexa 265 or Blackmagic URSA Cine 17K 65 have sensors that are closer to photographic medium format than to full-frame. The industry has not yet agreed on a uniform term.
The Look
The medium format look is achieved less by the optics and more by the sensor itself. Larger pixels mean less visible noise because the image needs less magnification for projection. Chromatic aberrations are less noticeable. The image appears "cleaner" at the same sensitivity — not because the sensor is better, but because it requires less magnification.
Lens Challenge
Most available medium format lenses originate from photography: Hasselblad/Zeiss 6x6, Mamiya 645, Leitz Thalia. These are typically sharp, high-contrast, and slow (f/2.8 to f/4) — perfect for some projects, but limiting for others. Focal lengths below 24mm are rare, and the widest lenses are often fisheyes with extreme barrel distortion. New manufacturers like Ancient Optics are developing dedicated cine lenses for the format for the first time — faster, with more character, and wider focal lengths.
Future
Democratization has begun. The Alexa 65 was a limited rental-only camera for blockbusters. The Alexa 265 is more widely available, and the Blackmagic URSA 17K and Fujifilm Eterna 55 are even purchasable. There is no longer a price difference compared to renting an Alexa Mini LF. The decision for the format is purely creative.