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Author Topic: Exact 35mm frame size. German Marin Expert Film Handler Posts: 227 From: Verbania (VB), Italy Registered: Jul 2001 posted 01-13-2002 05:54 PM                     In a 35mm film, What's the distance between each four perforation? I'm working as a projectionist for almost 1 year and I've been thinking it's about 18mm or 19mm. (Is hard to measure it!)  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 01-13-2002 07:08 PM                        For 35mm print film, the "pitch" or distance between each perforation is nominally 0.1870 inches. So the pulldown for each 4-perf frame is 0.7480 inches (19.00 millimetres). Standard SMPTE 195 specifies the projectable area for 1.85:1 "flat" as 0.825 x 0.446 inches. For 2.39:1 "scope", the projectable area is 0.825 x 0.690 inches. You can obtain copies of the SMPTE standards from the SMPTE at: http://www.smpte.org/smpte_store/standards/ ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Research Labs, Building 69, Room 7525A Rochester, New York, 14650-1922 USA Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion  |  IP: Logged German Marin Expert Film Handler Posts: 227 From: Verbania (VB), Italy Registered: Jul 2001 posted 01-13-2002 08:22 PM                     Thanks John, I was talking to my workmate about the speed of the film from platter to projector. Now I know the speed of film is 1,641.6 meters per hour (Maybe a new variable in our film lexic: Flm=1,641.6 m/h)  |  IP: Logged

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