Photometric Microscope Objective, 10x / 0.25

Description

This is a rather unusual optic manufactured by Gamma Scientific. It came in a small plastic capsule with the label as shown in the third photo. (The capsule had urethane lining which had deteriorated beyond recovery and had to be discarded – hence the stains on the label which was inside the capsule).

It appears to be a standard type of 10x microscope objective of the shorter adjustment length (37mm). The shroud that would have carried the nomenclature has been replaced with a special shroud that has a pinhole and is optically deadened with a flat black finish.

It is identified as a ‘photometry objective’ which would explain the black shroud. The pinhole is located at the focal plane of the objective which indicates this was focused on an aerial image. The pinhole very accurately defines an absolute area for light integration.

The objective is in excellent condition.

Photo set 1555
***MPN 700-10-7
***OEM Gamma Scientific Inc
***SKU*** 21577