3.5-inch lens with coating in cell
Date: 1900-1950
Inventory Number: 2007-1-0175
Classification: Lens
Dimensions:11 x 11 x 1.5 cm (4 5/16 x 4 5/16 x 9/16 in.)
Description:
This is a lens with very little curvature. It is 3 1/2 inches in aperture. The cell is flared out in the front and gilt. The edge is knurled. The rear surface of the lens has some coating which is mostly worn off. On reflection it disperses light into spectral colors.