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actuated when the Shutter Button is depressed is wired in series with the X-Contacts.
When the Shutter Button is released, the Microswitch opens the circuit before the X-
Contacts are closed a second time by the cam lobe. (Also see Figures 3-19 and 3-20 in
Section 3.)
Four-Frame Exposure
Each release of the Shutter on a Model 485B Studio Express Camera allows light from
all uncapped lenses to reach the film. If all four lenses have their caps removed, one
exposure produces four identical portraits on a single sheet of Viva film.
Alternatively, removing the lens caps one at a time, sequentially from each of the four
lenses, will allow four different portraits to be made on a single sheet of film.
Figure 2-6 diagrams the image optical path through the Model 485B. From the
uncapped lens(es), the image passes through openings in the Selector Board, Aperture
Assembly and Shutter Board. When the Shutter is released and the blades open, the
image continues through the Shutter Plate openings, the Hood, square openings in the
Camera Body and finally onto the viva film.
For more details of the positions of Shutter Blades A and B when the Shutter is
released, see the preceding paragraph describing Shutter operation.
Figure 2-6. Optical path/four-frame exposure
Shutter Plate
Shutter Blades
Shutter Board
Aperture Assembly
Selector Board
Lens Board
Lenses
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