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Dall-Kirkham reflecting telescope, 1960-1975
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Dall-Kirkham reflecting telescope, 1960-1975, result 1 of 1

Item Details
Open Artstor
Available to everyone
Title
Dall-Kirkham reflecting telescope, 1960-1975
Folding amateur telescope
Work Type
Astronomy
Date
1960-1975
Location
Luton
Material
glass; metal
Description
Dall-Kirkham Cassegrain reflecting telescope of folding design, aperture 3.25 inches, its mirror is chipped, plus spare mirror (also chipped), in carrying pouch; Dated from 1960-75, this miniature reflecting telescope was built and designed by the amateur astronomer, Horace Dall. Fitted with a 3 ¾-inch main mirror, the whole telescope folds flat for a carrying pouch that will fit inside a person's pocket. The instrument uses an optical configuration now known as the Dall-Kirkham design, an adaptation of the earlier Cassegrain system first proposed in 1672. Dall conceived of his modifications in 1928 and corresponded on its merits with fellow amateur, Allan Kirkham in Oregon, America. Later the design was described in the journal, 'Scientific American' under the title of, 'Dall-Kirkham' a name that has stuck ever since.
ID Number
co57193
Source
Image and original data from Science Museum Group - https://collection.sciencemuseum.org.uk
Rights
The source metadata displayed in the Description field is released under a Creative Commons Attribution 4.0 license - https://creativecommons.org/licenses/by/4.0/. All other source metadata is released under Creative Commons Zero - https://creativecommons.org/publicdomain/zero/1.0/. The image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License - https://creativecommons.org/licenses/by-nc-sa/4.0/.
File Properties
File Name
large_1987_0528_0006__0003_.jpg
SSID
26311424

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