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  2. Televue - Wikipedia

    en.wikipedia.org/wiki/Televue

    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.

  3. Eyepiece - Wikipedia

    en.wikipedia.org/wiki/Eyepiece

    (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 ...

  4. Eye relief - Wikipedia

    en.wikipedia.org/wiki/Eye_relief

    The eye relief of an optical instrument (such as a telescope, a microscope, or binoculars) is the distance from the last surface of an eyepiece within which the user's eye can obtain the full viewing angle. If a viewer's eye is outside this distance, a reduced field of view will be obtained.

  5. Monocular - Wikipedia

    en.wikipedia.org/wiki/Monocular

    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.

  6. Tips pour in over 5,000 drone sightings. Reason to worry ...

    www.aol.com/tips-pour-over-5-000-131033198.html

    Editor's Note: This page is a summary of news on drone sightings for Tuesday, Dec. 17. For the latest news, view our story for Wednesday, Dec. 18. The FBI has received tips involving over 5,000 ...

  7. Top 5 Most Expensive States for Car Insurance Rates - AOL

    www.aol.com/top-5-most-expensive-states...

    Image source: Getty Images. Driving may be one of the most convenient ways to get from point A to point B, but you pay a premium for that convenience: Car insurance.

  8. Savings interest rates today: Make more on your money this ...

    www.aol.com/finance/savings-interest-rates-today...

    The FDIC is an independent government agency charged with maintaining stability and public confidence in the U.S. financial system and providing insurance on consumer deposit accounts.

  9. Telephoto lens - Wikipedia

    en.wikipedia.org/wiki/Telephoto_lens

    A collection of telephoto lenses. A telephoto lens, also known as telelens, is a specific type of a long-focus lens used in photography and cinematography, in which the physical length of the lens is shorter than the focal length.