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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. ...
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.
Lens layouts of earlier Nagler eyepieces Nagler "type 2" (1988) eyepiece lens layout. Invented by Albert Nagler and patented in 1979, the Nagler eyepiece is a design optimized for astronomical telescopes to give an ultra-wide field of view (82°) that has good correction for astigmatism and other aberrations. Introduced in 2007, the Ethos is an ...
Inflation heated back up again in November, but it likely wasn’t bad enough to keep the Federal Reserve from cutting rates next week. Consumer prices were up 2.7% for the 12 months ended in ...
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]
Macy’s said Wednesday that it has concluded its investigation into an employee who intentionally hid more than $150 million in expenses, and it has tightened its controls to avoid a repeat of ...
Still, the scope of the problem – renters have a median net worth of just $10,400 compared to about $400,000 for homeowners with only about half of that accounted for by home equity – suggests ...