graphic telescope
File:Drawings for graphic telescope varley.jpg's drawings of his invention]]
The graphic telescope is a type of camera lucida that has the power of a telescope. It was invented by Cornelius Varley in 1809. It can be used to draw broad landscapes.
Graphic telescopes allow the size of the projected image to be adjusted.{{cite web |title=Camera Lucida & Varley Graphic Telescope - Victoria and Albert Museum |url=http://www.vam.ac.uk/collections/paintings/features/cheating/lucida/index.html |archive-url=https://web.archive.org/web/20101228082329/http://www.vam.ac.uk/collections/paintings/features/cheating/lucida/index.html |url-status=dead |archive-date=28 December 2010 |website=Victoria and Albert Museum |date=28 December 2010}} They can be used separately, or with a portable table to reduce vibrations.{{cite web |title=Cornelius Varley |url=https://www.gracesguide.co.uk/Cornelius_Varley |website=www.gracesguide.co.uk |publisher=Grace's Guide to British Industrial History}}{{cite web |title=Original ad for graphic telescope |url=https://collection.sciencemuseumgroup.org.uk/objects/co536823/cornelius-varleys-patent-graphic-telescope-trade-card}} They may also be mounted in a vehicle.{{cite web |title=Cornelius Varley's Patent Graphic Telescope |url=https://www.cloudynights.com/topic/589504-cornelius-varleys-patent-graphic-telescope/ |website=Cloudy Nights |language=en}}
See also
References
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External links
- [https://web.archive.org/web/20101228082329/http://www.vam.ac.uk/collections/paintings/features/cheating/lucida/index.html Camera lucida and Varley Graphic telescope]
- {{cite web |title=Using the Patent Graphic Telescope |url=https://video.whyy.org/video/friday-arts-varleys-marvelous-invention-using-patent-graphic-teles/ |language=en |medium=video}}
- {{cite web |title=The graphic telescope and Varley's artwork |url=http://www.sites.hps.cam.ac.uk/whipple/explore/astronomy/artandastronomy/graphictelescope/ |website=www.sites.hps.cam.ac.uk |publisher=Whipple Museum of the History of Science}} (includes 1840 magazine article on instrument)
- [http://www.mhs.ox.ac.uk/cameras/index.htm?item17 A picture of a Graphic telescope], [https://www.skinnerinc.com/auctions/2419/lots/652 another].
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