is of this class, and being of short focus and made on the
rectilinear principle, it is a useful lens for all the purposes
already enumerated, and for architectural subjects, as well as for
copying of maps, drawings, printed matter, etc., etc.
Every amateur should possess one of these lenses, as [p161] well
as one of the more rapid-acting lenses for instantaneous work,
unless he can well afford to get the best.
[Illustration: DALLMEYER'S WIDE-ANGLE RECTILINEAR LENS]