GUNDLACH
SHUTTER (Unidentified)
Gundlach Optical Company, Rochester,
New York Mid-to-late 1890's
This unidentified model is believed to be one of Gundlach
Optical Company's later shutters, most likely manufactured during the mid-to-late
1890's based on its design.
This inter-lens shutter is equipped with a Rapid
Rectigraphic 4-1/4 x 6-1/2 lens, the barrel containing "Pat Dec.
9-1890". This is in reference to
Patent No. 442,251 for an element grouping designed to reduce chromatic aberrations:
Source: Google Patents
The patent was granted to Ernst Gundlach, a former employee
of Bausch & Lomb who would later establish the Gundlach Optical Company in 1884. Gundlach formerly specialized in microscopes
and microscope objectives, and around 1884, began to pursue lens manufacture. The
Rapid Rectigraphic, detailed in Gundlach's
Illustrated Catalogue of Photographic Lenses, Etc., Sixth Edition, June, 1891, was Gundlach's
top-of-the-line landscape lens. The two curved shutter blades are also
characteristic of late 1890's shutters, differing from the two straight-edged
blades found on the Gundlach Shutter, Time & Instantaneous of 1891, and on
Gundlach's New Photographic Shutter of 1895.
Eight-leaf
iris with circular adjustment
The slotted top end of the pneumatic release valve is similar
to that found on Gundlach's New Photographic Shutter of 1895, and the rear-mounted
pneumatic valve can be suggestive of an earlier shutter such as Gundlach's Time
& Instantaneous. However,
rear-mounted pneumatic valves can be found on later shutters as well.
Ernst Gundlach left Gundlach Optical in 1895, establishing
a new firm, the Gundlach Photo-Optical Company.
Gundlach retained the rights to his December 9, 1890 patent, covering
designs for his Rapid Rectigraphic and Perigraphic lenses. It's a mystery as to
what lenses or shutters he subsequently produced, as few ads for Gundlach
Photo-Optical Company are seen. When encountered, the ads are devoid of model
names or engravings and provide little insight.
As a result of the shutter's installation within the
barrel, the manufacturer's name has been partially concealed (or destroyed). What appears to be "Optical Co." is
seen in Gundlach's typical script, and Gundlach Optical Company is presumed to
be the maker. A serial number of 5966 is
seen on the forward barrel section, along with what appears to be "Front
Lens 14-3/4". The rear barrel section contains "Equivalent" and
the rest is undetermined. Although not
always the case, the four-digit serial number suggests this to be a later lens,
and probably a later shutter as well.
Gundlach's Rapid Rectigraphic lenses have been seen on Ilex General shutters into the early 1920's
This is the only example of this shutter I'm aware of,
and as Gundlach shutters go, it can be considered among their rarest.