Copal #0 pinhole shutter with shutter release cable mount

thingiverse

This is a pinhole shutter designed to fit a Copal #0 hole in a lensboard. You can insert a shutter release into the cable box and screw it into the hole at a the end. The box is to protect the cable mount from shearing stress. You may want to adjust the size of the square hole in the box to more snugly fit your particular shutter release cable. **Please Note**: you need to dowload the following two libraries: https://www.thingiverse.com/download:352942 and https://dkprojects.net/openscad-threads/threads.scad which are required for the .scad files to render. The mounting thread specifications were taken from [Copal #0 specifications](https://skgrimes.com/wp-content/uploads/2020/04/co0-scaled.gif). If your printer does not print 1mm as 1mm adjust the `scale_factor` parameter in `pinhole_shutter_parameters.scad` If the locknut has trouble threading onto the base, try increasing `interior_thread_multiplier` in `pinhole_shutter_parameters.scad` To assemble you will need four machine screws: 3x 6-32 3/16" length 1x 6-32 3/8" length or 3x M3.5 5-6mm length 1x M3.5 8-9mm length It is designed to accept pinholes in the center of a 19mm diameter disc. According to [t2sqred](https://www.thingiverse.com/thing:2969357) this is the size of [Lennox Laser pinholes](http://daystarlaser.com/product/photographic-pinhole/) but I make my own pinholes so I don't know this for a fact. If you drill your own pinholes in quite thin aluminum the slider will sometimes catch the edge of the pinhole when installing it, so care is required. This remixes several other things: [schlem's Shutter Cable Release Adapter Tapered Threads (S.C.R.A.T.T.)](https://www.thingiverse.com/thing:186443) which you will need to download because it is included in openscad with a `use<>` statement [t2sqred's Copal 0 pinhole shutter](https://www.thingiverse.com/thing:2969357) and my [OpenSCAD version of it](https://www.thingiverse.com/thing:4785670) Dan Kirshner's [OpenSCAD threads module](https://www.thingiverse.com/thing:1938150) which you will need to download because it is included with a `use<>` statement.