Seeking help to build a large format shutter for barrel lenses
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Here's an example of a dual curtain focal plane shutter.I'm thinking maybe one could make this vertical with coil/extension springs and two solenoids + a microcontroller.
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Not sure if you've seen this site, but it has some info on repairing shutters. Maybe it could help.
I would be interested in helping, though I'm not sure what I could do.
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Here is what I use for my home brew 4x5 camera. It is powered with a model airplane servo and Arduino. Good for speeds as short as 1/4 s.
hey bobu, Thank you so much for your reply!I'm trying to visualize in my head how your design works.Is the aluminum shape a slice of pie shaped or is it a pie with slice cut out?How fast of shutter speed do you think this would be able to achieve?Thanks so much!Be well :)
Maybe it is easier to make a shutter that rotates on a single pivot? Maybe a blade shaped like a pie slice of a circle. The blade would rotate 30 degrees or so to open and close. A thin piece of painted aluminum could be driven by a hobby servo. This idea would not fit neatly into the wooden box of the antique shutter.
Hey, I was told it would be easier to make a dual curtain roller blind shutter.Think of a hole in a piece of paper. And two sheets, one in front and one behind.This could be rectangular sheets that just cover the hole and maybe think this is in a vertical orientation.Now, the rear sheet is always allowing light through and the front one is covering the hole from light.Attach coil springs to both that and use fast solenoids to release them.For exposure, drop the front curtain/rectangular piece of paper and depending on your desired shutter speed, use a microcontroller to time when to release the rear piece of paper that will close the shutter.https://en.wikipedia.org/wiki/Focal-plane_shutter#Leica-type_dual-curtain_focal-plane_shutter
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