5x7 Stereo Darkroom Printing Mask

A simple mask for printing two stereographic images onto a single 5x7 sheet of paper in the darkroom. The images will be 60mm square.

Note that this is specifically designed to sit on top of a "Speed Ez El" (yellow metal easels popular in many darkrooms). I haven't tested it on any other 5x7 easel, but the design is simple enough that there's a good chance it will work. You literally put the paper in normally, then set this directly on top of the paper in the easel so it selectively blocks out the light.

Optional tab to superglue into a slot in the mask so you can more easily grip it for placing and removing it.

I will probably be adding additional masks for other paper sizes (and other image window sizes) as I find the need for them in my own photography. If you have a request, let me know. It should be really fast for me to add other variations of the design.

Blender file also included if you want to remix.