Eyepiece insert for plate holder--200″ prime focus?

In collections

Details

Title: Eyepiece insert for plate holder--200″ prime focus?
Original Format: photograph: print
Agent Subjects: Palomar Observatory
Collection: Harrington Collection
Series/File: Academic Divisions
Caltech Archives ID: 10.22.79-21
Copyright: The Caltech Archives has not determined the copyright status of this image.