HF The History of Photography 600pág

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7 JOHANN ZAHN. Reflex box camera obscura,
Io85
8 Folding reflex camera obscura, set up for
use. Constructed by W. & S. Jones, London,
c. I 7 50, the camera has two lenses, one for
portraits, the other for views. (A mirror in
the periscope reflects the image on to a piece
of drawing paper in the bottom of the box.
The artist observes the image through a
wadded opening in the side, and inserts his
hand through a light-tight sleeve.)
9 WILLIAM CHESELDEN. Camera obscura,
I733
IO s ' GRAVESANDE. Sedan chair camera
obscura, I7II