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Tele Vue once manufactured a 5" refracting telescope named the MPT, the Multi-Purpose Telescope. It had a fast f/4 ratio, and had an adjustable diaphragm that ranged from f/4 to f/20. Only a small number were made, with the last being kept by Televue to use as a final optical quality control for all eyepieces they make.
Mirrors and lenses are the critical light-bending components of a telescope. Objective: The first lens or curved mirror that collects and focuses the incoming light. ...
This is a list of United States Army fire control, and sighting material by supply catalog designation, or Standard Nomenclature List (SNL) group "F".The United States Army Ordnance Corps Supply Catalog used an alpha-numeric nomenclature system from about the mid-1920s to about 1958.
The Meade Instruments (also shortened to Meade) was an American multinational company headquartered in Watsonville, California, that manufactures, imports, and distributes telescopes, binoculars, spotting scopes, microscopes, CCD cameras, and telescope accessories for the consumer market. [2]
The scope base is the attachment interface on the rifle's receiver, onto which the scope rings or scope mount are fixed. Early telescopic sights almost all have the rings that are fastened directly into tapped screw holes on the receiver, hence having no additional scope base other than the receiver top itself.
Kennedy Johnson was 15 years old when she gave birth to a baby girl in a Detroit foster home for teen moms, in February 1996. Twenty-five years later, when Johnson found herself in northern Ghana ...
Orion put out a semi-quarterly mail-order catalog as well as email catalogs. The company was a prominent advertiser in North American astronomy magazines, such as Sky & Telescope and Astronomy . In July 2024, Sky and Telescope magazine reported that Optronic Technologies, the owner of Orion Telescopes, had closed their facilities in California ...
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