Binoculars


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Binoculars 

A set of two identical telescopes, one for each eye, which gives binocular vision of magnified distant objects. The images are erected using either an eyepiece of negative power, or prisms, or very occasionally, an additional lens system placed between objective and eyepiece. On binoculars, the magnification M and the diameter D of the objective or entrance pupil are shown as MD (e.g. 8 ✕ 30). Syn. field glasses; prism binoculars (for those which use prisms as erectors). See erector; galilean telescope; terrestrial telescope.
References in periodicals archive ?
The team will be in the visitor centre from 10am until 4pm this Saturday and Sunday, demonstrating and offering assistance on a wide range of binoculars and telescopes.
The photo ID will be held by zoo officials as guests enjoy the zoo during their visit and will be returned when the binoculars are brought back to the office.
The same principles that apply to telescope also apply to binoculars. However, binoculars have a clear advantage over monoculars.
The objective of this tender is to ensure that DALO for the next 7 years will be able to provide handheld binoculars (further called binoculars) and handheld binoculars with built-in laser range finder (further called LRF-binoculars).
With quality rangefinding binoculars now available, I have discovered how to speed up the ranging and angle-computing process.
Randy's interest in binoculars came about in an unusual way: His job sent him to Geneva, Switzerland, for weeks at a stretch, and he learned to appreciate the city's Saturday flea market, where he often found wonderful vintage binoculars and telescopes.
Meanwhile, fans of the history of modern-day Israel will have a chance to bid on Rabin's binoculars at a sale to be held this month at the Jerusalem of Gold Auction House in Jerusalem for an opening bid of $5,000.
Binoculars are quite often a better instrument to use when you're just starting out.
The binoculars feature rubber armor protection for a firm grip with or without gloves.
Binoculars are such marvelous instruments for stargazing that no observer, beginner or advanced, should be without them!
During daylight hours things look just as bright through binoculars and scopes with 4mm exit pupils as through those with 7mm exit pupils.
The free lunch deal is non-existent with high-quality binoculars. But it's an investment worthy of any serious hunter.