Optical filter mount for wide angle lens

Mounts a 50.8mm optical filter to a 170 degree M12 wide angle lens (17mm diameter).

I designed this in order to make a spherical touch surface.

I used a monochrome ELP camera module with the IR filter removed.

Edmund optics #43-949 IR Longpass filter added in front of the camera using this adapter.

860nm IR LEDs used to provide light for the camera. (OSRAM SFH 4253-Z)

All this sat inside an acrylic dome.