SINGLE ACHROMATIC LENS
Manufacturer Unknown Early to mid-1880's
Single achromatic lens unidentified as to maker, slotted
for Waterhouse stops.
Also referred to as a Single element or Single view, lenses
such as these were seen on cameras from some makers in the early to mid-1880's.
Most notably, the Blair Tourograph Company and the
Blair Tourograph & Dry Plate Company's cameras and
other apparatus from this era are seen with nickel finishes.