Barlow, Extenders & Rear Converters

Enhance your viewing power with our directory of the top barlows, extenders, and rear converters, ideal for detailed celestial observations.

Askar Sharpstar

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SharpStar Optics specializes in advanced telescopes and optical products designed for both amateur and professional astronomers.
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Guan Sheng Optical (GSO)

Camera Accessories Classical Cassegrain Maksutov-Cassegrain Maksutov-Newtonian Modified Cassegrain Reflector Reflector Dobsonian Refractor Research Grade Ritchey-Chretien Schmidt-Cassegrain Schmidt-Newtonian

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GSO, or Guan Sheng Optical, is renowned for manufacturing high-quality telescopes, optical components, and precision-engineered optics designed to enhance every stargazing experience.
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Orion Telescopes & Binoculars

Binocular Camera Accessories CDK Optical Design Classical Cassegrain Club Listings Corrected Dall-Kirkham (CDK) Dall-Kirkham Guide Scopes Maksutov-Cassegrain Maksutov-Newtonian Modified Cassegrain Reflector Reflector Dobsonian Refractor Retailers Ritchey-Chretien Schmidt-Cassegrain Schmidt-Newtonian Solar Spotting Scopes

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1975	51-200		251,932

Orion Telescopes & Binoculars is an American retail company that sells telescopes, binoculars and accessories online and in-store for astronomy and birdwatching.
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PrimaLuceLab

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Astrograph Camera Accessories Corrected Dall-Kirkham (CDK) Dall-Kirkham Reflector Refractor Ritchey-Chretien Schmidt-Cassegrain Schmidt-Newtonian

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2013	1-10

PrimaLuceLab is an Italian company with a brilliant staff of engineers, designers and expert users, founded in 2013 to create innovative solutions for remote space exploration.
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Takahashi America

Dall-Kirkham Reflector Refractor Spotting Scopes

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From their manufacturing facilities in Urii, Japan, and their headquarters in Tokyo, Japan, Takahashi designs and creates optical tube assemblies, mounts, oculars and accessories for astronomical observing and astrophotography.
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