About this 3D model
I made these awesome Steampunk Goggles... but I didn't have any 52mm Photographic Filters... OpenSCAD (and MakerBlocks tutorials) to the rescue. It took a few iteration to get the size right, but with a 0.1mm nozzle these are "press fit" with no glue required. Made in a honecomb shape to fit my current "bee" theme/obsession.