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...

reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. In the 20th...

doublet lens refracting telescope, the largest refractor ever successfully used for astronomical observation. The Swedish 1-m Solar Telescope in the Canary...

the aperture.The second largest refracting telescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific...

invention soon spread across Europe. The design of these early refracting telescopes consisted of a convex objective lens and a concave eyepiece. Galileo...

eyepiece. They are free of chromatic aberration found in refracting telescopes. Newtonian telescopes are usually less expensive for any given objective diameter...

others, among the first to use a refracting telescope as an instrument to observe stars, planets or moons. The name "telescope" was coined for Galileo's instrument...

types of optical telescope : Refracting telescopes, which use lenses and less commonly also prisms (dioptrics) Reflecting telescopes, which use mirrors...

image. The reflecting telescope was invented in the 17th century by Isaac Newton as an alternative to the refracting telescope which, at that time, was...

1880s). In the records for the largest refracting telescopes, all three were outperformed by the 91 cm (36 in) refractor installed at the Lick Observatory...

The achromatic telescope is a refracting telescope that uses an achromatic lens to correct for chromatic aberration. When an image passes through a lens...

refracting telescope, the Keplerian telescope, which became the foundation of the modern refracting telescope, while also improving on the telescope design...

century. Great refractors were large refracting telescopes using achromatic lenses (as opposed to the mirrors of reflecting telescopes). They were often...

Sons, made many of the record-breaking refracting instruments, including the still-largest refracting telescope at the Yerkes Observatory, gaining "worldwide...

Atmospheric Cherenkov telescope used to detect gamma rays Infrared telescope Radio telescope Submillimeter telescope Ultraviolet telescope (see also Ultraviolet...

The James Lick Telescope is a refracting telescope built in 1888. It has a lens, which is 91 centimetres (36 in) in diameter—a major achievement in its...

(Present) Observatory built: 2000, at Skyline Boulevard Leah Type - Refracting telescope Maker - Alvan Clark & Sons, 1883 Aperture – 8 inches Focal Length...

(16 in) Schmidt-Cassegrain telescope and an historic 29-centimetre (11 in) refractor telescope built in 1874, the oldest telescope in Australia in regular...

of refracting telescopes. His design, the "Gregorian telescope", however, remained un-built. In 1666, Newton argued that the faults of the refracting telescope...

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...

optical telescopes in North America. A list of optical telescopes located in North America by aperture. Some of the big traditional refracting lens telescopes...

for Robert Stirling Newall and when completed it was the largest refracting telescope in the world. It was located at Newall's private observatory until...

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...

construction of the observatory were all sourced locally, but the Clark Refracting Telescope was assembled in Boston. The observatory has carried out a wide array...

Refractor (also known as the Grande Lunette) is a double telescope with lenses (83 cm + 62 cm), in Meudon, France. It is a twin refracting telescope built...

that sometimes afflicts very large refracting telescopes. It is the equivalent of mirror sag in reflecting telescopes. It occurs when the physical weight...

an optical refracting telescope, the first recorded functional telescope 1609 – Galileo Galilei builds his first optical refracting telescope 1616 – Niccolò...

(320 in) telescopes at Paranal Observatory. The entire building constitutes the altazimuth mount, saving on mass and cost. A refracting telescope (with finderscope...

An aerial telescope is a type of very long focal length refracting telescope, built in the second half of the 17th century, that did not use a tube. Instead...

called a scope informally, is an optical sighting device based on a refracting telescope. It is equipped with some form of a referencing pattern – known as...