8.4mm-21mm Zoom Telescope Eyepiece

Astronomy

Accession Number: 2018.ast.80

Description:

This item is in a small rectangular cardboard box with a blue lid with gold lettering. The object itself is cylindrical and black, with a small lens at one end and another similar sized lens inset at the other end. There is a ring around the middle of the cylinder with alternately silver and ridged sections, apparently to make adjustments to the eyepiece. Lettering on the object is engraved and painted white. There is a small gold paper sticker stuck to the barrel of the object.

Primary Materials: Plastic, Metal: Iron Alloy, Glass

Markings:

On the top of the box: “SWIFT”
“ZOOM EYEPIECE
FOR TELESCOPE, 11/4″ DIA.”

Stamped in ink on the base of the box: “JAPAN”

Around the barrel of the eyepiece: “8.4mm-21mm”
“JAPAN”
“No.12-62842”

On the gold sticker stuck on the barrel: “PASSED
JAPAN TELESCOPE
INSPECTION INSTITUTE”

Dimensions (cm): Length = 10, Diameter = 3.5.

Function:

This eyepiece allows the changing of the focal length within a single eyepiece used with a telescope.

Condition:

Excellent: The eyepiece shows no signs of use or damage. The box is somewhat worn on the exterior and exterior, with a torn places, one significant, where the blue surface has peeled off.

Manufacturer: Swift, Japan

Date of Manufacture: Late 1960s, Early 1970s

Provenance:

This object was likely moved from the David Dunlap Observatory in Richmond Hill in 2008, upon the sale of the observatory. It was stored at the Department of Astronomy and Astrophysics until 2017, when it was moved to a new storage location in McLennan Physical Laboratories.