Extending human vision (eye-like things) say how many and what lenses it uses
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| Microscope | 2 convex lenses to magnify small, close objects
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| Refracting Telescope | 2 convex lenses, lenses with longer focal lengths
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| Reflecting telescope | 1 concave mirror, 1 plane mirror, 1 convex lens
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| Binoculars | 2 refracting telescopes (2 convex lenses), light reflected several times to keep it short
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| Camera | Camera works very much like human eye. Instead of a lens that can change shape to focus the light on the "screen",camera moves position of lens to change distance from lens to screen
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