is formed by reversing the single lens and making it the front lens
of the double combination, and adding a similarly constructed
achromatic lens to the rear. These lenses are indispensable for very
rapid work and for work requiring straight lines. As the double
combination is more perfectly corrected for spherical aberration, it
is better adapted for architectural and other work not admitting of
distortion. Of this class of lenses we would recommend ANTHONY'S
RAPID DRY PLATE LENS, [p159] which has a double achromatic
combination for making instantaneous views, portraits groups, etc.,
and will meet all the requirements of those who do not care to incur
the expense of a Dallmeyer or other first-class lens.
[Illustration: ANTHONY'S RAPID DRY PLATE LENS]
[Illustration: THE PLATYSCOPE LENS]
Of a higher class is THE PLATYSCOPE LENS, which is a rectilinear or
perfectly corrected lens of great working rapidity, and is well
suited for all the requirements of the amateur; and as to price, it
holds a middle place and next to the DALLMEYER'S RAPID RECTILINEAR
LENS, which is the most perfect instrument at present known to the
profession, and is almost universally used by professional out-door
photographers and by all amateurs who care to produce the finest
possible work. This lens might be considered indispensable for all
[p160] work requiring an instantaneous exposure, as by means of
the dry plate and the drop shutter some very remarkable pictures
have been made of bodies in rapid motion.
[Illustration: DALLMEYER'S RAPID RECTILINEAR LENS]