Quote Originally Posted by Tim Gray View Post
I think 35mm film is actually 35mm wide, measuring edge to edge. Remember the original 'full frame' was for motion picture, which runs the film through vertically, so the frame there wasn't even 24x36mm. Wiki has many more details than this I'm sure.

Have fun with the camera.
The term 135 was introduced by Kodak in 1934 as a designation for the cassette for 35 mm film, specifically for still photography.
The film itself is 35 mm wide (and several meters long).
135film-size.jpg

The image size on 35 mm film is 24 mm wide (between the perforations) and 36 mm long in normal film photography cameras.
135_film_perforations.jpg
Hence: the common "full-frame" image size of 2436 mm, used for d*****l cameras.
Old half-frame cameras like the Olympus Pen (1960's) use 24 x 18 mm on 135 film, thus making 72 images on a 135 film.
Olympus_Pen_1959-first-model.jpg Olympus_pen_EE2_camera_front.jpg

See also: http://en.wikipedia.org/wiki/135_film