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At the North East Astronomy Forum 2010, they revealed the Ethos SX, a 3.7mm focal length eyepiece with an even greater 110° apparent field-of-view. [3] In 2011, a new line of eyepieces was introduced called the Delos. These eyepieces are based on the Ethos but have a smaller field of view of 72°. Instead, they boast a comfortable 20mm eye relief.
TelVue CloudCast streaming media and video on demand service: Formerly known as PEG.TV, TelVue CloudCast is an internet streaming service that handles both linear and on-demand video delivery to multiple screens, including Over-theTop settop boxes like Roku, and mobile devices. [6]
The Archaeological Museum of Delos (Greek: Αρχαιολογικό Μουσείο Δήλου) is a museum on the island of Delos, near Mykonos in the South Aegean, Greece. It is noted for its extensive collection of statues unearthed in the surrounding area of the ancient site, which has been declared a UNESCO World Heritage Site .
The higher the twilight factor, mathematically, the better the resolution of the binoculars when observing under dim light conditions. Mathematically, 7×50 binoculars have exactly the same twilight factor as 70×5 ones, but 70×5 binoculars are useless during twilight and also in well-lit conditions as they would offer only a 0.14 mm exit pupil.
The eyepiece, or ocular lens, is a cylinder containing two or more lenses; its function is to bring the image into focus for the eye. The eyepiece is inserted into the top end of the body tube. Eyepieces are interchangeable and many different eyepieces can be inserted with different degrees of magnification.
Galilean type Soviet-made miniature 2.5 × 17.5 monocular Diagram of a monocular using a Schmidt-Pechan prism: 1 – Objective lens 2 – Schmidt-Pechan prism 3 – Eyepiece. A monocular is a compact refracting telescope used to magnify images of distant objects, typically using an optical prism to ensure an erect image, instead of using relay lenses like most telescopic sights.
The Large Binocular Telescope at the Mount Graham International Observatory in Arizona uses two curved mirrors to gather light. An optical telescope gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to collect data through electronic image sensors.
Telephoto lenses are sometimes divided into the further sub-types of short or portrait (85–135 mm in 35 mm film format), [5] medium (135–300 mm in 35 mm film format) and super (over 300 mm in 35 mm film format). [6]
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