Led ring for Nikon 35mm f/1.8 lens

Here is the structure for building a led ring for your Nikon AF-S DX 35mm f/1.8 G DSLR lens; it works with 5mm leds which you can choose how to make them work (in my case, I used Arduino for making some fades, flashes and other effects).

NB: It doesn't need a too high infill (I used 50%), but print it at least with 0.15mm precision to make sure that all supports fit well on the lens