Countersink holes for 2-56 flat head screws. The metal is too thin for full depth countersink. Just stop when you start to enlarge the clearance hole out the other side. The thicker Prism Box Lid will accept a full depth countersink. The remaining depth is tapped 2-56 so you can screw in a flat-headed screw pointing out ofn the box and the screw head will not rise above the inside surface of the box and scratch the glass prisms.
B) Countersink holes
C) Attach Front, Back
test that parts fit together
C) Attach Front, Back
D) Place PBS cubes and RA prisms
D) Place PBS cubes and RA prisms
E) Place Spacer Cubes
E) Place Spacer Cubes
F) Place spacer wedges
F) Place spacer wedges
G) Attach Cover
G) Attach Cover
I) ND filter taped over the relay lens.
Prism_Box_Frame version 2 will have room for ND filter and 75mm lens both inside hole. Lay filter directly on pbs cube. Then lay flat side of lens directly on filter. Then screw in retainer ring.
I) ND filter taped over the relay lens.
H) Prism box with lenses
The numbers show the focal lengths of the lenses (in millimeters).
