Guillotine shutter slot sizes?

Schunn99

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Joined

Mar 23, 2007

Messages

43

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Little Elm,

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Multi Format

• Mar 18, 2011

• #1

Hey Apug,

I am looking at building a sliding box camera for 4x5 film similar to the 8x10 sliding box camera that is described in Primitive Photography by Alan Greene. I want to build a Guillotine shutter to put between my homemade lens and the box camera.I plan to make several slots for different shutter speeds.I was wondering does anyone know what size of a slot for the shutter equals what shutter speed?
for example a 1/4" slot equal about what shutter speed.

thanks,
Scott Hunnicutt

 

Dan Fromm

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Mar 23, 2005

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6,809

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Multi Format

• Mar 18, 2011

• #2

How fast will the slot move?

 

Bill Kumpf

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Apr 15, 2010

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5

Location

Lascassas, T

Format

4x5 Format

• Mar 18, 2011

• #3

I researched guilltine shutters to use with barrel lens. The articles are posted on the Large Format Forum. Hope it helps

http://www.largeformatphotography.info/guillotine-shutter/guillotine-shutter-construction.html

 

brucemuir

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Dec 25, 2007

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2,228

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Metro DC are

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• Mar 18, 2011

• #4

Wow that linked page is brilliant.
Thanks Bill.

 

Jim Jones

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Jan 16, 2006

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Chillicothe MO

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• Mar 18, 2011

• #5

Scott: To eliminate the variables in calculating, designing and constructing a guillotine shutter, just build it and check its speed by any of the methods often used for checking speeds in this range such as an analog TV screen or LP turntable, a neon or other gaseous discharge lamp, etc. Based on that, shutter slides can be constructed for other speeds.