Takes 18 exposures of 10x10mm.
on a 16mm. film rolled in a light proof cassette (see the pic. bellow).
1. Pull up the film advance
mechanism (with the round orange window)
2. Aim and press the trigger
to take the picture.
3. push down/back the advance
mechanism.
4. The exposed 16mm. film is
pushed from one cassette into the second one.