John Henry Dallmeyer (London, England)
Portrait and Group Lens (D),
Patented in 1866, this lens is a Petzval-type (two
groups; two cemented elements in a front group, and two elements with an air
spacing in the rear group). The D Series is a general purpose
formulation, suitable for portraits and groups of people, but not as sharp as
other types for landscapes unless stopped down. Its advantage for
portraiture was its speed, and, because of the large size of the glass necessary
for such speed, it is heavy and often almost too large for the lensboards of
field view cameras. And, since it had to be stopped down for landscapes,
the advantage of speed was thereby negated. Regardless, it sometimes is
encountered, as the example above.
In the U.S., Dallmeyer lenses were a fixture in E. & H.T.
Anthony catalogs, although always more expensive than Anthony's house brand, E.A
Illustrated Catalogue Issued Annually by Thos. H. McCollin, Thos. H.
McCollin (Philadelphia, PA), January 1, 1876, p. 19
The Photographer's Friend, Richard Walsl (Baltimore,
MD), 7th edition, 1882, p. 38
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