Canon PELLIX QL Instructions Manual page 15

Relation Between the Pellicle Mirror. CdS. Diaphragm and Shutter
=- ' 3 ,
Deteimlne the axporurc by prers~ng
the CdS actuating laver.
Press the shutter button. The shutter is clicked.
The diaphragm is fully o p n r d .
The diaphragm begin% to
clore. Closed down to pre-set position. The diaphrrzm b p i n r l a open,