Specific Notes for Bolex Installation:

The Bolex H16 series camera normally uses a hand-wound spring motor for driving the 
camera mechanics. In order to use an external electric motor, you must disable this internal 
spring motor:
	(1) Release all spring motor tension by running out the motor until it stops.
	(2) Release the motor clutch by moving the clutch lever from the MOT position (up) 
to the O position (down).
	(3) Engage the drive shaft mechanism by sliding the exposure button from the 
STOP position (middle) to the M position (rear). Make sure the exposure button is locked 
in this position, as if you were shooting film continuously.

Now you are ready to use the external electric motor. Before mounting it on the Bolex 
camera body, test shoot at least 1 frame with the ThingM installation in order to be sure that 
the motor is in the shutter-closed HOME position.

Both the Bolex mechanics and the ThingM motor should ultimately be at the shutter-closed 
position. On the Bolex, the 1:1 drive shaft has a pin with a fat side and a thin side. The fat 
side of the pin should also be marked with a red dot, and be facing toward the front of the 
Bolex body. Likewise on the ThingM motor, the drive shaft coupling has a fat groove and a 
thin groove. Position the motor coupling by hand so it engages the Bolex drive shaft with 
the fat groove over the fat pin. Attach the 3 mounting legs of the ThingM motor mount to the 
Bolex camera body with a slotted screwdriver. 

Once the ThingM motor is firmly attached to the Bolex camera body, test shoot a few more 
frames with the ThingM controller. With the lens or lens cap removed from the Bolex lens 
turret, observe that the shutter opens and closes correctly in sync with the motor. Program 
an Exposure Time of at least 1 second. Observe that the shutter blades are fully open 
during the time exposures.

The Bolex Reflex series uses a variable shutter of 135 degrees full opening. The use of 
the beam-splitter prism for reflex viewing loses an additional 25% light. Therefore the 
effective exposure factor = 0.28 times the motor revolution time. The relationship between 
film speeds and typical exposure times are:
	1.2 FPS	(approximately 1 sec revolution	)	1/4 sec exposure
	2.4 FPS	(approximately 1/2 sec revolution)	1/8 sec exposure
	4.8 FPS	(approximately 1/4 sec revolution)	1/16 sec exposure