« on: August 01, 2013, 06:14:34 PM »
But anyway, regarding 35mm film "which is actually 36mm" you couldn't be more wrong, roll film is measured by its film gauge, that is, it is 35mm wide, hence 35mm film, it has nothing to do with the arbitrary dimensions of the film we expose.
Let me be more precise. The gauge (from edge to edge of the film including the sprocket holes) is 35mm. The area we exposed on a 35mm film was 24 x 36mm. That is the relationship that drives the "standard" lens.
I will research further on the relationship with cinema film.