https://helpwiki.evergreen.edu/wiki/images/6/6c/Aps_BolexH16_edit.pdf
APS Bolex 16mm Reflex Operating Guide - Help Wiki
https://youtu.be/5vf0iwCtBl8?si=ry7NOmS_TjeBooVz&t=72
Bolex Shutter Speed at 24 FPS is 1/65th of a second. Taking into account light loss through the reflex optics reduces the effective shutter speed to 1/80th of a second. This is for Exposure compensation only, as far as motion is concerned the shutter speed remains at 1/65th at 24 FPS. Provided the variable shutter is left fully open
https://www.cinematography.net/edited-pages/Bolex-Shutter.htm#:~:text=The Bolex shutter is at,shutter speed of 1%2F80.
How-to-read-a-Kodak-film-can-label.pdf
https://www.youtube.com/watch?v=ZxrjzYDbc0I
https://www.youtube.com/watch?v=MeInTRVJBKk&t=221s