Framed Prints
Framed Print of The Kew Photoheliograph and Temporary Observatory at Rivabellosa, near Miranda del Ebro, 1860. Creator: Unknown
The Kew Photoheliograph and Temporary Observatory at Rivabellosa, near Miranda del Ebro, [Spain], 1860. The Kew photoheliograph consists of a tube having the form of a truncated pyramid, at the smaller (upper) end of which is fixed the object-glass, 3 4-10 inches in diameter, and 50 inches focal length. The focal image of the sun formed by the object-glass is 47-100ths of an inch in diameter; but before it is allowed to fall on the sensitive plate it is enlarged, by means of a secondary combination of lenses, to four inches in diameter. The image is thus magnified about eight times linear, and the intensity of its light diminished 64 times. The sensitive plates, six inches square, are placed at the large end of the pyramidal tube of the telescope. The tube is what is termed equatorially mounted, and is made to follow the diurnal motion of the sun by means of clockwork. The plates being only six inches square, while the sun's image is 4 inches in diameter, it will be seen that only a small extent of the corona could be depicted. I mention this in order that there may be no misconception on this point: had I desired to make photographs of the whole of the corona, I should have adopted a totally different arrangement'. From Illustrated London News, 1860. Heritage Images features heritage image collections. © The Print Collector/Heritage Images
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Media ID 36373747
Astronomer Astronomers Camera Contraption Makeshift Observatory Scientists Telescope
Modern Frame 14"x12" (36x31cm)
Ready to Hang Contemporary Framed Prints adds style, protection, and a polished touch to your space - effortlessly.
Your artwork will be printed as shown in the preview. To adjust please select Edit Printed Image under the Buy button
Wood effect frame, card mounted, 10x8 fade resistant photo print. Overall outside dimensions 14x12 inches (36x31cm). Environmentally and ozone friendly, 40mm wide x 15mm Polycore® moulding has the look of real wood, is durable and light and easy to hang. Biodegradable and made with non-chlorinated gases (no toxic fumes) it is efficient; producing 100 tons of polystyrene can save 300 tons of trees! Prints are glazed with lightweight, shatterproof, optical clarity acrylic (providing the same general protection from the environment as glass). The back is stapled hardboard with a sawtooth hanger attached. Note: measurements provided are estimated outer dimensions, which include both the image and the frame. While we aim to keep sizing consistent, exact dimensions may vary slightly due to differences in print size or production requirements, which may result in a variation in the overall size (up to approximately 2.5cm (1"))
These are individually made so all sizes are approximate
Estimated Image Size (if not cropped) is 24.4cm x 15.6cm (9.6" x 6.1")
Estimated Product Size is 36cm x 31cm (14.2" x 12.2")
