"Keplerian telescope" redirects here. Not to be confused with Kepler space telescope.
A 200 mm diameter refracting telescope at the Poznań Observatory
A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope). The refracting telescope design was originally used in spyglasses and astronomical telescopes but is also used for long-focus camera lenses. Although large refracting telescopes were very popular in the second half of the 19th century, for most research purposes, the refracting telescope has been superseded by the reflecting telescope, which allows larger apertures. A refractor's magnification is calculated by dividing the focal length of the objective lens by that of the eyepiece.[1]
Refracting telescopes typically have a lens at the front, then a long tube, then an eyepiece or instrumentation at the rear, where the telescope view comes to focus. Originally, telescopes had an objective of one element, but a century later, two and even three element lenses were made.
Refracting telescopes use technology that has often been applied to other optical devices, such as binoculars and zoom lenses/telephoto lens/long-focus lens.
^"Telescope Calculations". Northern Stars. Retrieved 20 December 2013.
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A refractingtelescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a...
reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refractingtelescope. In the 20th...
invention soon spread across Europe. The design of these early refractingtelescopes consisted of a convex objective lens and a concave eyepiece. Galileo...
lens refractingtelescope, the second-largest refractor ever successfully used for astronomy. The largest lens is the Swedish 1-m Solar Telescope. There...
the aperture.The second largest refractingtelescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific...
eyepiece. They are free of chromatic aberration found in refractingtelescopes. Newtonian telescopes are usually less expensive for any given objective diameter...
image. The reflecting telescope was invented in the 17th century by Isaac Newton as an alternative to the refractingtelescope which, at that time, was...
types of optical telescope: Refractingtelescopes, which use lenses and less commonly also prisms (dioptrics) Reflecting telescopes, which use mirrors...
others, among the first to use a refractingtelescope as an instrument to observe stars, planets or moons. The name "telescope" was coined for Galileo's instrument...
The Swedish 1-m Solar Telescope (or SST) is a refracting solar telescope at Roque de los Muchachos Observatory, La Palma in the Canary Islands. It is run...
the refractingtelescope in 1608, both of which appeared in the spectacle-making centres in the Netherlands. With the invention of the telescope and microscope...
61-centimeter (24-inch) Clark RefractingTelescope, which is now used for public education, with 85,000 annual visitors. The telescope, built in 1896 for $20...
Largest practical refractingtelescope, the Yerkes Observatorys' 40 inch (101.6 cm) refractor, is built. 1900 — The largest refractor ever, Great Paris...
refractingtelescope, the Keplerian telescope, which became the foundation of the modern refractingtelescope, while also improving on the telescope design...
The achromatic telescope is a refractingtelescope that uses an achromatic lens to correct for chromatic aberration. When an image passes through a lens...
reflecting telescopes – List of large optical telescopes List of largest optical refractingtelescopes List of space telescopes List of solar telescopes List...
century. Great refractors were large refractingtelescopes using achromatic lenses (as opposed to the mirrors of reflecting telescopes). They were often...
(16 in) Schmidt-Cassegrain telescope and an historic 29-centimetre (11 in) refractortelescope built in 1874, the oldest telescope in Australia in regular...
appears three dimensional when used by humans. The first telescopes, called refractingtelescopes, were also developed with a single objective and eyepiece...
a telescope. Objective: The first lens or curved mirror that collects and focuses the incoming light. Primary lens: The objective of a refracting telescope...
Great Paris Exhibition Telescope of 1900, with an objective lens of 1.25 m (49 in) in diameter, was the largest refractingtelescope ever constructed. It...
Atmospheric Cherenkov telescope used to detect gamma rays Infrared telescope Radio telescope Submillimeter telescope Ultraviolet telescope (see also Ultraviolet...
to: Another term for a hand-held refractingtelescope for terrestrial observation A monocular, a compact refractor "Spy Glass", a recurring sketch on...
called a scope informally, is an optical sighting device based on a refractingtelescope. It is equipped with some form of a referencing pattern – known as...
of refractingtelescopes. His design, the "Gregorian telescope", however, remained un-built. In 1666, Newton argued that the faults of the refracting telescope...
1880s). In the records for the largest refractingtelescopes, all three were outperformed by the 91 cm (36 in) refractor installed at the Lick Observatory...
In 1857 a refractingtelescope of 38 centimetres (14.96 in) aperture objective, the Arago equatorial telescope, was completed. This telescope was proposed...
optical refractingtelescopes List of optical telescopes List of proposed space observatories List of radio telescopes List of solar telescopes List of...
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