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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.
(The eyepiece and the eye together make an image of the image created by the objective, on the retina of the eye.) The amount of magnification depends on the focal length of the eyepiece. An eyepiece consists of several "lens elements" in a housing, with a "barrel" on one end. The barrel is shaped to fit in a special opening of the instrument ...
The composition of the Delos mosaics and pavements include simple pebble constructions, chip-pavement made of white marble, ceramic fragments, and pieces of tesserae. [2] [6] [13] The latter falls into two categories: the simpler, tessellated opus tessellatum using large pieces of tesserae, on average eight by eight millimeters, [14] and the finer opus vermiculatum using pieces of tesserae ...
Eye relief is the distance from the rear eyepiece lens to the exit pupil or eye point. [34] It is the distance the observer must position his or her eye behind the eyepiece in order to see an unvignetted image. The longer the focal length of the eyepiece, the greater the potential eye relief.
Fenton's pictures during the Crimean War were one of the first cases of war photography, with Valley of the Shadow of Death considered "the most eloquent metaphor of warfare" by The Oxford Companion to the Photograph. [13] [14] [s 2] Sergeant Dawson and his Daughter: 1855 Unknown; attributed to John Jabez Edwin Mayall [15] Unknown [e] [s 1] The ...
A reticle, or reticule [1] [2] also known as a graticule, is a pattern of fine lines or markings built into the eyepiece of an optical device such as a telescopic sight, spotting scope, theodolite, optical microscope or the screen of an oscilloscope, to provide measurement references during visual inspections.
In March, a mother was horrified to find a pedophile symbol on a toy she bought for her daughter. Although the symbol was not intentionally placed on the toy by the company who manufactured the ...
Delos (/ ˈ d iː l ɒ s /; Greek: Δήλος; Attic Greek: Δῆλος, Doric Greek: Δᾶλος), is a small Greek island near Mykonos, close to the centre of the Cyclades archipelago. Though only 3.43 km 2 (1.32 sq mi) in area, it is one of the most important mythological, historical, and archaeological sites in Greece .
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