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File:The 28-inch Telescope.jpg

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Description

This is the largest conventional refracting telescope in Britain and 7th largest in the world. The lens has a diameter of 28 inches (72cm). Built by Sir Howard Grubb, the first observations were made in 1893 with an eyepiece giving a magnification of 670 times.

The 28-inch telescope replaced a smaller refractor by Merz. The same mount was used but the dome was converted from a drum to an onion shape in order to make room for the larger instrument. The dome was originally made of steel and covered with papier mâché. Today the dome has a fibre-glass cover.

The design of the mount and dome enable the telescope to be moved to view almost any part of the sky. The recent addition of a computer-aided guidance system makes it easier to use.
Date
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The 28-inch Telescope

Author Andres Rueda
Camera location51° 28′ 39.91″ N, 0° 00′ 04.15″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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This image, originally posted to Flickr, was reviewed on 11 March 2013 by the administrator or reviewer File Upload Bot (Magnus Manske), who confirmed that it was available on Flickr under the stated license on that date.

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author name string: Andres Rueda
Flickr user ID: 23327787@N08
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coordinates of the point of view

51°28'39.907"N, 0°0'4.151"W

inception

4 March 2012

focal length

4.92 millimetre

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‎Flickr photo ID

7074992867

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Date/TimeThumbnailDimensionsUserComment
current19:48, 11 March 2013Thumbnail for version as of 19:48, 11 March 2013724 × 1,418 (873 KB)File Upload Bot (Magnus Manske)Transferred from Flickr by User:Jacopo Werther

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