Film scanning masks

prusaprinters

A set of masks to make a basic film scanning setup. The .f3d file is parametric, so can be adjusted to other formats.I've included 3 versions:135 mask for standard full frame 135 / 35mm film.6x6 mask for square format 120 film.Full 135 mask for 35mm film with sprocket holes (up to 45mm long exposures).I've also included a small foot that slips tightly onto hexagonal brass standoffs, and allows you to stick on a silicone dome foot to help prevent the setup from sliding on your desk. Required materials: A piece of translucent acrylic; I used matt effect. You need a 100x150mm piece, and many sellers online sell A5 samples of sheet for low prices which are twice the size needed.Some electrical tape.A light, I used a cheap video light.Some brass threaded standoffs to support the film scanner above the light.4 M3 cheese head bolts to hold the setup to the brass standoffs.A digital camera, and a means to support the digital camera above the film.(optional, but recommended) A 100mm round mirror; one of the cheap acrylic ones are fine. Print instructions:Print on a smooth bed surface (glass, smooth PEI) with the text on the mask facing up. This gives a nice smooth back to the mask, allowing the film to slide easily.Material used doesn't matter, so long as it isn't transparent (don't print this in PETG on glass if you want to keep using that bed). Assembly and use:Using the mask as a guide, drill a hole in the acrylic sheet for the bolt in each corner.Apply a piece of electrical tape to each corner of the smooth underside of the mask - this gives just enough clearance for the film to slide underneath.Use the M3 screws to clamp the mask and acrylic to one of the standoffs in each corner, and keep adding standoffs until the acrylic is high enough above the light to get nice even illumination across the whole area where the film will be.Place the mirror in the circular recess on top of the mask, and adjust your camera position until the image of the front of the lens is centered in the camera's view. This makes sure that the camera is oriented perpendicular to the film, making it easier to get the whole film area in focus.Slide the film in from the side between the acrylic and printed mask, and get scanning!