Pocket Magnifier
Item
Title
Pocket Magnifier
Description
The pocket focusing magnifier is made of lacquered brass and has an unusual Archimedean screw thread. Focusing is operated by twisting the body-tube along the thread in a circular motion to adjust the distance between the ocular and objective lens. These instruments were commonly composed of two plano-convex lenses of identical focal length, mounted with their plane sides outward at a distance apart equal to two-thirds of the focal length. This instrument would have been used in photography. It could be used to focus on an image by aiming the lens or placing it against an image, therefore not allowing light to enter.
Condition:
Cosmetically: There are small chips to the edge of the underside of the eyepiece glass, and to the thread.
Optically: The optics are good and functional.
Mechanically: The microscope is functional.
Cosmetically: There are small chips to the edge of the underside of the eyepiece glass, and to the thread.
Optically: The optics are good and functional.
Mechanically: The microscope is functional.
Subject
Focusing Magnifier
Creator
Unsigned
Source
Dean Reynolds Microscope Collection Powerpoint
Publisher
UNC Charlotte
Date
c. 1850-1900
Contributor
https://books.google.com/books?id=YElIAAAAYAAJ&pg=PA264&dq=camera+focus+magnifier&hl=en&sa=X&ved=0ahUKEwiN-buIjZnaAhVP4VMKHcFbAOYQ6AEIVjAI#v=onepage&q=camera%20focus%20magnifier&f=false
Rights
Texts and images from this collection may not be used for any commercial purpose without prior permission from the Graduate Office, UNC Charlotte.
Relation
N/A
Format
Magnifier: 2 1/2" closed, 3 1/2" extended.
Language
N/A
Type
Three-dimensional object.
Identifier
100407a
Coverage
Unknown