The two long handled screws at the top and the small silver one clamp the camera into the filter wheel housing, the two brass knurled knobs hold the bottom of the assembly to the top, capturing the filter wheel itself and allow rapid changes between the RGB filter set and the CMY filter set. Assembled Filter Wheel assembly with IR Blocker ready to be inserted into the face of the camera, and then the camera inserted into the Filter Wheel Assembly housing. The slide allows swapping between an eyepiece and camera. One of the water cooling line quick disconnects is shown in the lower left corner. Filter wheel has small holes in edges to insert tool into for turning.
Filters lock into place via ball spring detents.
Filter position is identified by lettering on edges of filter wheel itself.