Introduction
The viewfinder is the small "window" that the photographer looks through to compose or frame a scene. It gives the photographer roughly the same field of view that Bigshot's imaging lens has, allowing the photographer to frame the photo properly. Bigshot's viewfinder is a separate lens that is located above the primary imaging lens. Unlike the imaging lens, it is not designed to converge light to form an image. Rather, it works with the lens in the photographer’s eye to form an image on his or her retina at the back of the eye. Figure 1 shows a photographer looking through Bigshot's viewfinder while framing a photo. Place the mouse on top of the figure to reveal the viewfinder optics and the structure of the human eye.
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