Custom bokeh apertures (parametric but currently for 50mm lenses)
Description
A custom bokeh apertures, paremetric design (with solidworks sources included), but tested with two lenses, a vintage 50mm with a 49mm filter radius and a Canon 50mm 1.8 STM with 49mm filter radius. Both EF lenses tested on EF-S body. Either it can be screwed unto the top of the filter and the holder + aperture are one part like with the vintage example. Or it can be placed closer to a front element, like with the 50mm 1.8 STM and is printed with 2 parts, holder and a insert. Holder has smaller than 45 degree overhangs so it shouldn't need support even with bad printers, then a insert can be printed separately which is inserted by friction fit into the holder. The insert shapes are slightly smaller than the shapes in the filter variants to compensate for the fact that the inserts are almost touching the front element. All parts are not as good fit as I could make them and on purpose requiring som sanding so everybody can make exactly their perfect press fits and friction fits, regardless of the overxtrusion and filament quality. If you do not have a black filament then paint your filters black with enamel/water colors like I did mine, you want the photos to have darker images (less light into the lens) and not having tint aquired from the filament.
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