I modelled it for my pinhole pinholica camera, but it could be easily modified for any other camera. Fusion 360 file included

It allows you to shoot with relatively fast times (4, 2, 1, 1/2, 1/4). The speed and accuracy depends on your skill, but it more then enough for pinhole:) Also you get extra stabilisation due to release cable, that you couldn't get without it on this speeds.

Hardware:

• two m4 nuts
• m4 screw
• spring from ballpen

Bambu Lab

Bambu P1S

No

Yes

0.4

15