8mm Forum: Calculating film length

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Topic: Calculating film length

Eysteinn Gudni Gudnason
Junior
Posts: 10
From: RVK, Iceland
Registered: Apr 2010

posted October 12, 2010 11:01 AM

Hi.
I have film that is sound, but it is on a silent reel. Doesn't make any difference except when trying to find out the length of the film. It says 150feet, but I know it's probably shorter. Do you know how to calculate it?

I constantly get into trouble trying to find the correct length of film, sound, silent, regular, super etc. Is there a website explaining this?

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Wayne Tuell
Master Film Handler

Posts: 488
From: Minden, NV
Registered: Jul 2009

posted October 12, 2010 11:25 AM

Not sure if this helps, but everyone should have it.
http://motion.kodak.com/motion/Templates/OpenFlash.aspx?path=/motion/uploadedFiles/US_plugins_flash_en_motion_filmCalculator.swf&pageTitle=http://www.kodak.com%20-%20Film%20Calcula tor&flashWidth=600&flashHeight=400&flashBgColour=FFFFFF&WindowBgColour=FFFFFF

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www.16mmDrive-InFilms.com

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted October 12, 2010 10:53 PM

If you can project the film at 24 FPS and figure out the screen time, you'll have 50 feet for every 2.5 Minutes. (20 feet per minute, 4 inches per second...whatever.)

Throw in another 10 feet for leader and tail and you're no worse than close enough.

-Something that the video crowd has no grasp of: the Art of measuring time in FEET!

"How old's that boy of yours these days?"
"He'll turn 105,120,000 Feet next month!"

PS: I have reels that are marked for both sound and silent footage. The 150 Foot marks for both are pretty close to being at the same radius from the spindle.

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All I ask is a wide screen and a projector to light her by...

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