Editing Medium format (section)

===70&nbsp;mm film – still versus cine===
For some professional medium-format cameras, those used in school portraiture for example, long-roll film magazines were available. Most of these accommodated rolls of film that were 100&nbsp;ft (30.5 m) long and 70&nbsp;mm wide, sometimes with perforations, sometimes without. Some cameras, such as the [[Hasselblad]], could be equipped with film magazines holding 15 foot rolls of double perforated 70&nbsp;mm film passed between two cassettes. 70&nbsp;mm was a standard roll film width for many decades, last used as late as the 1960s for 116 and 616 size roll films. It was also used for aerial photo-mapping, and it is still used by [[70&nbsp;mm film|large format cinema]] systems such as [[IMAX]].

'''70&nbsp;mm film''' used in still cameras, like [[Mamiya]] and Hasselblad, and '''70&nbsp;mm print film''' used in IMAX projectors have the same gauge or height as '''120 film.''' With '''70&nbsp;mm cine''' projector film, the perforations are inset by 2.5&nbsp;mm to make room for the old-style optical sound tracks; a standard established by [[Todd-AO#Todd-AO process|Todd-AO]] in the 1950s. IMAX cameras use '''65&nbsp;mm film,''' which have perforations and pitch that match-up to the '''70&nbsp;mm film''' used in IMAX projectors.