Art Photography I PGY 1401C Camera/Eyeball The camera can be compared to the human eye in several ways. The eye functions like an auto-exposure, auto-focus camera. Parts that can be compared in function are: EYE CAMERA Lens Lens Iris Aperture Eyeball Body Retina Film Plane Eyelid Shutter A lens is required for gathering and focusing light. Today’s lenses are a combination of positive and negative lens elements. A positive lens has convex surfaces that force light to converge. A negative lens has concave surfaces, diverging light. An image passing through a lens reaches the focal plane upside down and reversed laterally, just as it does in the human eye. The reversed image on film is easily corrected when printing. In humans, the brain translates the reversed image on the retina in the “correct ” manner so we see the scene right side up. The big difference in the way these two systems function are the ways the
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