Graduated Annulus - Antique and Vintage Cameras

Graduated Annulus

Sanger-Shepherd & Co.

London

England

Image of Graduated Annulus

Consists of a variable density annulus on a glass plate and second plate with index to which a scale has been added. 2 " diameter.

Notes:
Sanger-Shepherd name on second plate. Address on box: Sanger-Shepherd & Co. 5, 6 & 7 Gray's Inn Passage. Red Lion St. High Holborn. WC. (before 1910).

With:
Sanger-Shepherd red box.

These were used in various light measuring devices, Abney describes a sensitometer by Warnerke fitted with a similar wedge.

References & Notes:
BJA 1905, p. 1337. Abney, Instruction, p. 139.


Company Details:

Sanger-Shepherd

Sensitometry

Warnerke Standard

Sanger-Shepherd

Dawson's Densitometer

Graduated Annulus

Kodak Colour Densitometer


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