Is the Fujifilm GFX Eterna 55 Medium Format or Large Format? Both, Sort Of.
The Eterna 55 gets called medium format and large format, and both are technically correct. Here's why the terminology genuinely conflicts.
The Fujifilm GFX Eterna 55 gets called a medium format camera and a large format camera, sometimes in the same article. Neither label is wrong. They're just answers to two different questions, one from photography, one from cinema, and the confusion is genuinely built into how the two industries evolved their own separate vocabulary.
What "Medium Format" Means in Photography
In photography, sensor size categories are named relative to 35mm film, the historical standard. Full-frame sensors (36 x 24mm) match that original 35mm dimension. Anything meaningfully larger than that gets called medium format, a category that includes film backs and digital sensors ranging from roughly 44mm up through true medium-format film sizes.
The Eterna 55's sensor measures 44 x 33mm, the same sensor used in Fujifilm's GFX 100 II stills camera. By photography's naming convention, that's squarely medium format, and Fujifilm's entire GFX stills lineup has been marketed that way for years.
What "Large Format" Means in Cinema
Cinema uses a completely different reference point: Super 35mm film, the historical standard for movie cameras, not still photography's 35mm frame. Anything bigger than Super 35 gets called large format in cinema terms, and that category already includes full-frame sensors like the ones in ARRI's Alexa LF and Sony's VENICE, both firmly established as "large format" cinema cameras despite using the same 36 x 24mm sensor size photography calls full-frame.
Since the Eterna's 44 x 33mm sensor is larger than those already-large-format cinema sensors, cinema trade coverage calls it large format too, consistent with the existing lexicon of the industry it's actually competing in.
Why Both Labels Show Up for the Same Camera
The sensor itself hasn't changed between contexts, only which industry's reference point is being used to describe it. Photography measures against 35mm film and calls the Eterna's sensor medium format. Cinema measures against Super 35mm film and calls the same sensor large format. DPReview's own coverage flagged this directly, describing the Eterna as built around "the same 100MP 'large format' sensor (medium format in photography terms)," acknowledging both conventions apply simultaneously rather than picking a side.
The Signal in the Noise
This isn't really a case of one publication getting it right and another getting it wrong. It's a reminder that camera terminology often carries invisible industry context, the same physical sensor genuinely earns two different names depending on which reference frame the person describing it is using. Knowing both conventions exist is more useful than trying to settle on one "correct" answer, since you'll keep running into both terms as this camera gets discussed going forward.
Does knowing both terms are technically accurate change how you'd search for or discuss this camera going forward?
The Details
- Eterna 55 sensor: 44 x 33mm
- Photography's reference point: 35mm still film → sensors larger than 36x24mm (full-frame) are "medium format"
- Cinema's reference point: Super 35mm movie film → sensors larger than Super 35 are "large format," including full-frame cameras like the Alexa LF and VENICE
- Result: the same 44x33mm sensor is accurately medium format by photography convention and accurately large format by cinema convention
