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Additionally, Tele Vue eyepieces are well corrected for most aberrations, providing edge to edge pinpoint stars, and are well suited to use in popular "fast" telescopes. The most expensive Tele Vue eyepiece is the Ethos line, which consists of eight eyepieces known for excellent image quality and ultra-wide 100 degree fields, which can retail ...
Digital Photography Review was founded in December 1998 in the United Kingdom by Philip and Joanna Askey. [4] [11] On May 14, 2007, it was acquired by Amazon.[3] [4] [21] DPReview employs a dedicated editorial team of in-house and freelance writers, and was editorially independent of Amazon.
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 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 ...
Consumer Reports (CR), formerly Consumers Union (CU), is an American nonprofit consumer organization dedicated to independent product testing, investigative journalism, consumer-oriented research, public education, and consumer advocacy.
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.
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