General Information

Serial #

5201

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

WOOD BACKING/ BRASS LENS HOUSING/ GLASS OPTICS

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

15.8 cm

Width

9.1 cm

Height

4.4 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Photography

Category

Still camera parts

Sub-Category

N/A

Manufacturer

AKA

Ross

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Ontario

Period

Unknown

Canada

EQUIPMENT USED AT DOMINION OBSERVATORY, CANADA'S PREDOMINANT ASTRONOMICAL OBSERVATORY WHICH OPERATED FROM 1905 TO 1970.

Function

OPTICAL COMPONENT OF CAMERA WHICH FUNCTIONS BY BENDING LIGHT RAYS TO CREATE IMAGE WHICH IS IMPRINTED ON FILM IN CAMERA, FORMING PHOTOGRAPH. IN THIS CASE 2 LENSES ARE USED TOGETHER.

Technical

LENS MADE BY ENGLISH FIRM ROSS UNDER GOERZ PATENT. IN 1894 C.P. GOERZ OF BERLIN PATENTED DOUBLE ANASTIGMAT LENS CONSISTING OF CEMENTED TRIPLE MENISCUSSYSTEM IN WHICH REFRACTIVE INDEX INCREASED STEADILY FROM ONE END TO OTHER. ROSS OF LONDON ORIGINALLY MADE MICROSCOPES BUT BY 1860S MFD. CAMERA LENSES; IN 1897 IT BECAME ROSS LTD.; BY 1949 IT DISAPPEARED.

Area Notes

Unknown

Details

Markings

INCISED LETTERING ON LENS HOUSING READS ON DEXTER LENS "Goerz Patent [SCRIPT]/ 5 In. Double Anastigmat. [SCRIPT] F:7.7", "No 5201" & "Ross [SCRIPT], LONDON"; ON SINISTER LENS ""Goerz Patent [SCRIPT]/ 5 In. Double Anastigmat. [SCRIPT] F:7.7", "No 5238" & "Ross[SCRIPT], LONDON"

Missing

APPEARS COMPLETE

Finish

BROWN STAINED & COATED WOOD/ BRASS COLOURED METAL

Decoration

N/A