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.