achromatic doublet with cutaway section
Date: 1875-1925
Inventory Number: 2007-1-0344
Classification: Lens
Dimensions:2.6 × 3.2 × 4.2 cm (1 × 1 1/4 × 1 5/8 in.)
Description:
An achromatic doublet lens is held in a blackened brass collar attached at right angles to a bracket. The lens has its lower third cut off to reveal the doublet pair.