Search results
Results from the WOW.Com Content Network
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 ...
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 word optics is derived from the Greek term τα ὀπτικά meaning 'appearance, look'. [1] Optics was significantly reformed by the developments in the medieval Islamic world, such as the beginnings of physical and physiological optics, and then significantly advanced in early modern Europe, where diffractive optics began. These earlier ...
Eye relief – Eye relief is the distance from the rear eyepiece lens to the exit pupil or eye point. [15] It is the optimal distance the observer must position their eye behind the eyepiece to see a non-vignetted image. The longer the focal length of the eyepiece, the greater the eye relief.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
A key concept for the study of history and public life in most societies regardless of topic, historical significance makes judgements about what is important to be remembered about the past and why, through its reflections on historical aspects to contemporary culture and society [14] including historical reputations, events, issues, [15] monuments, [16] and what is chosen to be emphasized in ...
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.