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Refracting telescope
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A refracting telescope is a type of optical telescope that uses a lens as its objective to form an image. The refracting telescope design was originally used in spyglasses and astronomical telescopes
A 200 mm diameter refracting telescope at the Poznań Observatory
A 200 mm diameter refracting telescope at the Poznań Observatory
Engraved illustration of a 46 m (150 ft) focal length Keplerian astronomical refracting telescope built by Johannes Hevelius.
Engraved illustration of a 46 m (150 ft) focal length Keplerian astronomical refracting telescope built by Johannes Hevelius.
Alvan Clark polishes the big Yerkes achromatic objective lens, over 1 meter (100 cm) across (1896).
Alvan Clark polishes the big Yerkes achromatic objective lens, over 1 meter (100 cm) across (1896).
This 12-inch (30 cm) refractor is mounted in a dome on a mount that matches the Earth's rotation.
This 12-inch (30 cm) refractor is mounted in a dome on a mount that matches the Earth's rotation.
Optical telescope
Videos
An optical telescope gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to colle
Refracting telescope
…A refracting telescope (also called a refractor or dioptric telescope) is a type of optical telescope that uses a lens as its objective to form an image. The refracting telescope design was originally used in spyglasses and astronomical telescopes but…
The Large Binocular Telescope at the Mount Graham International Observatory in Arizona uses two curved mirrors to gather light
The Large Binocular Telescope at the Mount Graham International Observatory in Arizona uses two curved mirrors to gather light
Eight-inch refracting telescope at Chabot Space and Science Center
Eight-inch refracting telescope at Chabot Space and Science Center
The Keck II telescope gathers light by using 36 segmented hexagonal mirrors to create a 10 m (33 ft) aperture primary mirror
The Keck II telescope gathers light by using 36 segmented hexagonal mirrors to create a 10 m (33 ft) aperture primary mirror
Two of the four Unit Telescopes that make up the ESO's VLT, on a remote mountaintop, 2600 metres above sea level in the Chilean Atacama Desert.
Two of the four Unit Telescopes that make up the ESO's VLT, on a remote mountaintop, 2600 metres above sea level in the Chilean Atacama Desert.