Vocas Monitor Support Short for 15mm Bars Camera Controllers These are two pin jumpers

These are two pin jumpers (also called shunts) that will create an electrical connection between two pin headers

Works great as an physical indicator without notifying anyone but the wearer

3 Stop Neutral Density Filter

a binocular tripod adapter such as those listed here

Sometimes cheap and easy solutions provide benefits that far outweigh the cost

Vocas Monitor Support Short for 15mm Bars Camera Controllers These are two pin jumpersThe Vocas Monitor Support Short for 15mm Bars attaches directly to standard 15mm rails and allows the use of any monitor that can be mounted on a 1 4" screw. Compatible with HDS 215, HDS 315 heavy duty mattebox supports, MBS 100 (Type A, B, E, F, H, I, J, and M), G 4 mattebox support with integrated shoulder bracket, pro rail support, (Types K and L), rail support DSLR, Blackmagic cinema camera, high DSLR, separate 0. 59" (15mm) bracket for monitor