Lens Plate 3-˝x magnification at focal distance of 4 inches. Fits OptiVISORŠ.
The lens plate consists of two individual magnifying lenses prismatically ground from crown glass to control the index of refraction and to bring objects into focus as one image for both eyes. Donegan #LP-10.
Forensics Lab Supply Number 3540328.
Formerly Grau-Hall Corporation dba Grau-Hall Scientific.
Optical Microscoy Primer