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Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects. Most binoculars are sized to be held using both hands, although sizes vary widely from opera glasses to large pedestal-mounted military ...
Some just look at the sky using nothing more than their eyes or binoculars, but more dedicated amateurs often use portable telescopes or telescopes situated in their private or club observatories. Amateurs also join amateur astronomical societies, which can advise, educate or guide them towards ways of finding and observing celestial objects ...
Astronomy with Binoculars (Faber, 1963) [4] Amateur Astronomer's Handbook (Crowell, 1968) [3] [5] Beginner's Guide to Astronomical Telescope Making (Transatlantic Arts, 1976) [6] Observational Astronomy for Amateurs (Enslow Publishers, 1982) [5] [7] Observer's Guide to Halley's Comet (Arco Pub, 1985) [8] A Rhyming History of Britain (Walker and ...
Absolute Beginners – Carole Stott's two-page guide for newcomers to astronomy. In the Shops, the magazine's reviews section where telescopes, binoculars, mounts, eyepieces and all other kinds of astro-paraphernalia are assessed by regular reviewers including Steve Ringwood and Ade Ashford. There is also a two-page book reviews section ...
Binoculars diagram showing a Schmidt–Pechan prism. A Schmidt–Pechan prism is a type of optical prism used to rotate an image by 180°. These prisms are commonly used in binoculars as an image erecting system. The Schmidt–Pechan prism makes use of a roof prism section (from the German: "Dachkante", lit. roof edge).
Vision of humans and other organisms depends on several organs such as the lens of the eye, and any vision correcting devices, which use optics to focus the image.. The eyes of many animals contains a lens that focuses the light of its surroundings onto the retina of the eye.
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