STEREOSCOPIC CAMERASFig. 2-2. The Stereo Vivid Camera.The lenses and filters are set into the wall of the camera so
there are no protrusions other than the filter retaining rings.
The exposure dials and film winding knobs are aligned to pro-
vide a smooth, almost flat top to the camera so it has remarkably
few projections.
Focusing is provided by moving the film aperture within the
camera, giving increased steadiness to the lens mounts, a desir-
able feature. The focusing knob revolves in a horizontal plane
upon a vertical shaft and is built back into the body with only
an operating edge protruding. Focus is controlled by a range-
finder built into the top of the camera, immediately beneath the
exposure dials. Both finder and rangefinder have the same eye-
piece so shifting is avoided. The rangefinder windows lie at
approximately the same distance apart as the lenses so the range-
finder parallax is within the stereo parallax, while the finder
itself shows a' field which lies within the stereo field, A level is
visible in the finder when in use.