A maker coin that doubles as a polarized adjustable light filter (and a fidget toy). The two blank pucks are optional but will allow you to cut lenses out of larger filters easily as they are sized appropriately for the inner and outer sizes you will need. When fully assembled you can dial in how dark the window in the middle appears from mostly transparent to entirely black. Features a pause to insert the second lens and the first lens assembly.

Step 1. Print plate one with the two lens “pucks”

Step 2. Use the smaller puck to cut out an small circle from a polarized film or sheet

Step 3. Use the bigger puck to cut out a bigger circle from a polarized film or sheet

step 4. Insert the smaller lens that you just cut out into the outer ring in plate 1.

Step 5. Screw the innermost ring into the outer ring in plate 1. making sure it's holding the lens in place. The top of the inner and outer rings should be roughly flush with the nubs sticking up.

Step6. Print plate 2 and insert the larger filter lens followed by the entire assembled inner ring during the pause on the 34th layer and resume the print.

Step 7 Remove the completed print and look through the coin. If you spin the inner ring assembly the lens will vary between black and transparent.