Thousands of images, texts, and audio/video from ECU's diverse collections and beyond.

Five English Objectives RMS Threads

Date: 1860 - 1900 | Identifier: LL02.48.06.36
These five objectives are typical of English lenses. One is made by Negretti and Zambra, one by Watson and three are unmarked. The focal lengths are from 1/9 inch to 1.5 inches. Two are divisible, having both high and low powers. more...
Click on image to zoom