Standard (non rotating) largest I've seen is a 6x24 I thought very briefly about buying one but settled for a 6x17 which is a format I like and use a 75mm standard lens. 75mm (or 80mm) is a Normal lens on a 6x6 camera so is normal in the vertical aspect and wide in the horizontal and perfect for the shots I want to make.
I think there's a Roundshot that makes 1 360º image on a roll of film.
Burke and James of Chicago, USA made a cast iron 90-degree wide angle camera with no distortion that made an image 2 1/4 inches high by seven inches long. I had one in the 1960s and it was fabulous. One shutter speed, 1/125 sec. and four f-stops. Sorry I don't have an image available right now. It was based on a camera used by the U. S. Army to view the trajectory of a torpedo dropped by a torpedo bomber in
World War II. It was very heavy.
I have a roll in which I accidentally shot 6x9 using the 645 frame numbers, resulting in an interesting daisy-chain of double exposures that collectively take up the entire roll. I'd like to make a full-length contact print of it someday, but I don't have any paper long enough. I can't really call it a single "frame", though.
A modern-day 120 Circuit camera is the best way to describe it...forgot the brand. The camera rotates on the tripod while the film moves the opposite way behind a slit to be exposed. One single exposure as the image is laid onto the film. The camera rotates until you stop it or runs out of film...which with 120 film is about 420 degrees.
I have just printed 360 degrees of it -- corner to corner on a 16x20 piece of photo paper. Nice image at the beach near Carmel.
I have a roll in which I accidentally shot 6x9 using the 645 frame numbers, resulting in an interesting daisy-chain of double exposures that collectively take up the entire roll. I'd like to make a full-length contact print of it someday, but I don't have any paper long enough.
If you are ever over in my neck of the woods, drop me a note and we can try doing a contact print - Got a couple of strips of paper 40" wide that would do the job.