Shadowbox film slide scanner

I was given a load of 35mm slides over the holidays and realized I needed to get to work on that long-term plan I had for a modular film scanner, as I mostly shoot 120 square film.  So I found a very reasonably priced ($35) lightbox from a local New York photography vendor, the Porta-Trace / Gagne 6x6" and based the design around that.  The system is designed to hold your film or slide at a single focal plane and allow a digital camera set up above it to digitize your film images quickly and inexpensively while maintaining flexibilty to fit your needs.

The 35mm slide holder or 120mm film holder is placed on top of the lightbox and then the Scannerbox Lid is fitted on top of that, centering the holder in the lightbox and securing it together with little light leaks thanks to the bevel.  For 35mm slides just drop them right in the middle and the sloped edges should allow you to pick them up quickly to swap the slides out.

My 120 film is uncut so I wanted the holder to be able to simply get pulled through the scanner while holding it tight.  I had found this holder (https://www.thingiverse.com/thing:5179032) that had a top and bottom held together with magnets and modified it to fit into the Scannerbox Lid.  It uses (8) 5mm magnets that are themselves held in place with superglue to keep the top affixed to the film holder.

But the rest of the film scanner system can be anything, from a simple tripod setup to buying a Negative Supply riser.  Personally I went to the hardware store and bought a foot and a half of 3/4" steel pipe and a flange and screwed it to some plywood that I had polyurethaned and added some foot to it, my camera then just attached via a Mafer clamp.  The important thing is that you ttether your camera to a laptop and once it is in the right location and focused you just don't touch it, activating the shutter from your laptop instead.

I do have some 6x12 images that I'll be creating a holder for in the future as well, let me know if you're interested in having that uploaded here or if you have other sizes you'd like to see.