Thanks AJ! The width is 72mm. I wanted a 1:3 format. Which shutter are you refering to? My first one was an orange juice can lid with a hole in it. That proved to be a bad idea, because of vignetting. The hole was not big enough to cover the format, and with all of the layers, it was too thick. I changed it by drilling out the hole to a larger size (the hole in the camera), and the shutter became a slide. The round juice can lid is history!
Originally Posted by aj angiuli