Pocket Magnifier
Item
Title
Pocket Magnifier
Description
The pocket focusing magnifier is made from lacquered brass and has an unusual Archimedean screw thread. To focus the instrument, the body-tube is twisted up along the thread in a screwing motion to adjust the distance between the ocular lens and the 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 for photography and were designed to image what they are aimed at, or place against and therefore do not let light to enter.
Condition:
Cosmetically: The brass is marked by age and use but is in good condition.
Optically: The lenses are clear and functional.
Mechanically: The magnifier is functional.
Cosmetically: The brass is marked by age and use but is in good condition.
Optically: The lenses are clear and functional.
Mechanically: The magnifier is functional.
Subject
Focusing Magnifier
Creator
Unsigned
Source
Dean Reynold's Microscope Collection Powerpoint 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 http://www.microscope-antiques.com/focusingphoto.html
Publisher
UNC Charlotte
Date
c. 1900
Contributor
Laura Burgess
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 1/4" closed, 3 1/4" extended
Language
N/A
Type
Three-dimensional object
Identifier
101124
Coverage
Unknown