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Viewfinder StencilThe viewfinder's goal is help the photographer to compose a photo by providing the same view as that captured by the camera. Since Bigshot can capture three types of photos, each with a different field of view, the photographer expects to see the appropriate FOV in the viewfinder for each image type.
Bigshot achieves this with a simple trick. The viewfinder lens is designed to provide a field of view that is larger than that provided by every optical module on the polyoptic lens wheel. The polyoptic wheel, other than the optical modules, has cutouts or stencils or view apertures on them that come in front of the viewfinder. These stencils are appropriately located and sized so that they mask a part of the view through the viewfinder's and only show the view corresponding to the current optical element being used to capture the image. Figure 3 shows the Bigshot polyoptic wheel and the approximate view through the viewfinder for the three different photo types. Try rotating the lens wheel to see different view apertures come into place in from the viewfinder, thereby allowing the viewer to see only the appropriate field of view through the viewfinder.
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