7
Single (Half-Frame) Exposure Operation
When Mode Change Lever (1) (Figure 4) is set at single-frame, after the Shutter has
been charged, levers (2) and (3) move a second forked Mode Change Lever (4) toward
the Motor. Mode Change Lever (4) is set so that pin (a) rests in its forked slot.
Figure 4. Mode change lever set at single frame
Pin (a) now moves to the new position shown in Figure 5 (right or left), out of the forked
slot. When the Mode Change Lever (4) moves in the direction of the arrow, pin (a)
deflects its forked end, swinging it to the right (or left). This in turn pushes pin (b), now
in the forked slot, causing (b) to rotate the Light Interception Blade (5) clockwise and
cover aperture (c). (This is easier to visualize by also looking at pin (b) and the Light
Interception Blade in perspective in Figure4.)
Figure 5. Mode change lever moves to new postion
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