Bausch & Lomb Optical Co. (Rochester, NY)
Iris Diaphragm Shutter, Transitional (with pneumatic release) 1888-type, Brass - c. 1890
The International Annual Anthony's Photographic
Bulletin, Vol. III, 1890-1891,
W. J. Harrison and A. H. Elliot, eds., E. & H. T.
Anthony & Co. (New York, NY), ads p.
95
Notes: Like
the 1888 model Iris Diaphragm Shutter, this shutter has the top
pneumatic tube that regulates the length of exposure. However, it
has the pneumatic shutter release (the vertical, Ni-plated tube) of the
1891 model. The advertisement engraving above, from 1890, would
seem to represent this shutter, in that it has a pneumatic shutter
release. Obviously, the artist did not have the actual shutter to
view while drawing it, since the pneumatic tube for the shutter release
is drawn on the wrong side of the shutter, and the horizontal pneumatic
tube that regulates the duration of exposure is missing entirely.
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