See, hipsters are liberating medium format Bronicas and Mamiyas from used shelves at camera dealers, shooting roll film, and tagging the results on Instagram with "#120mm".
120 film is not "120mm". I know we call 135 film by the common nomenclature of "35mm", but 135 and 120 are not, in and of themselves, dimensional measurements of anything. They're just Kodak's old in-house designators for certain kinds of film:
"While I’d love to believe there’s some Alex Jones-esque illuminati back story contributing the number 120 to the Knights Templar, unfortunately it was merely a numbering system Kodak implemented to keep track of all the film formats they manufactured. There were many types of film since they were specific to different cameras back then so they needed to simplify their film ordering system.
So Kodak decided that the daylight-loading roll films on flanged spools would be numbered in the order of introduction, starting with the first Kodak film of this type introduced with the No. 2 Bullet camera in 1895 as number 101. Of all the medium format roll types that Kodak produced, only number 120 survived the test of time and is the only medium format film still being produced today."
