8mm Forum: Elmo 16CL screen size?

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Topic: Elmo 16CL screen size?

Den Brown
Master Film Handler

Posts: 271
From: London, UK
Registered: Apr 2007

posted January 07, 2008 04:06 PM

If an Elmo 16CL is positioned 6 metres from the screen, what size image will be projected?

Thanks.

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Hugh McCullough
Expert Film Handler

Posts: 156
From: Old Coulsdon. Surrey. UK
Registered: Oct 2006

posted January 07, 2008 05:35 PM

Allowing for manufacturing tolerances the approx sizes will be

35mm lens Pic size approx 1.25 metres x 0.9 metres
50mm lens Pic size approx 0.95 metres X 0.70 metres
75mm lens Pic size approx 0.63 metres x 0.47 metres

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EIKI Ex 6100 xenon machine.

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John Whittle
Jedi Master Film Handler

Posts: 791
From: Northridge, CA USA
Registered: Jun 2003

posted January 07, 2008 05:37 PM

There are charts for this, but you can use basic math as well. However you have left out one variable that makes the answer impossible--the lens focal length. The factors you need to know are the width of the 16mm frame (.380 inches) the focal length of the lens and the distance to the screen. All measurements must be in the same unit and since I don't have the metric for the width at hand, you'll have to accept english measure. For your 20 foot throw with a 2 inch lens, the width should be about 40 inches. (If my basic math is correct). A scope picture would be 80 inches wide.

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