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Camera Obscura
It use silver nitrate but the image fades after a while. Then sodium thiosulfate was used so that it did not fade -
Sepia or Salt Paper
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Kodak
They made circular photos -
Kodachrome
Color reel -
Polaroid
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it did not need a photometer to measure the light separated from the camera
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Instamatic
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Minolta
first slr system with autofocus
