| Reflex
mirror and other improvements |
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| • | As remarkable
as the instruments were, they didn't fully |
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| satisfy the
needs of artists. While canvas painting is a vertical |
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| pursuit, many
artists preferred to sketch a scene on a laptop |
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| pad. In 1676,
Johann Christoph Sturm, a professor of |
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| mathematics at
Altdorf University in Germany, introduced a |
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| reflex mirror.
Mounted at a 45 degree angle from the lens, the |
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| mirror
projected the image to a screen above. This elegant |
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| configuration
is at the core of modern single lens reflex |
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| cameras. |
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| Design of a
modern single lens reflex camera |