Macro Aperture Cap For Canon EF / Reverse Ring

thingiverse

Macro reverse lens aperture cap for Canon EF lenses used with Nikon & BR-2A filters (52mm size). Other camera combinations are possible, but only when the aperture cannot or shouldn't be set from the menu on Canon cameras. Don't print this design in transparent color unless you want to paint it black! Notice: The diameter shrinkage was under 1% during subsequent checks. The files are centered to the origin and include an empty cap for further editing. An 8mm hole, measured with a Nikon D3100 and Canon EF 50mm 1.8 lens, likely indicates an 80mm distance and F-stop of 10. There's also a video demonstrating how this was made: http://youtu.be/JM7eN46OzHQ