An overview with photographs of many lesser known telescopes typical of their time.

…re of The European Southern Observatory(ESO), and the Space Telescope European Coordinating Facility(ST-ECF). Contains a shared archive server, services, news, updates, digitized sky images, links, and public datasets.…

Introduction, history, inside, telescope functions, spacecraft systems, and books.

Contains information about new discoveries made by the space telescope. Page includes technical data, astronomical photos, and news releases.

Offers advice for selecting and buying first telescope.

Guide to selecting and using a telescope and its mount, and viewing solar system and deep sky objects.

Realistic views of what you will see with different telescopes and eyepieces, and links.

Discusses telescopes, types, buying, and accessories.

Amateur telescope making, mirror grinding.

Description, photographs, rebuilding of telescope, making simple lens for reflector, and links.

Photos and descriptions of binocular stand, several telescopes, solar camera, and links for parts.

Beginner's advice and articles, and telescope, eyepiece and accessory reviews.

Maksutov Cassegrain and Maksutov Newtonian telescopes by owners.

Beginner's advice and articles, and telescope, eyepiece and accessory reviews.

Selection depends on eyesight, telescope's aperture and optical design, atmospheric conditions, and type and size of the object being viewed.

8" to 30" aperture Dobsonian telescopes, available with a choice of optics produced by several well known opticians and optical companies.

Produces the Sgr-4, a 4-1/4" reflector on an altazimuth mount. Offers reflector telescope kits and accessories.

Apochromatic refractor and Maksutov-Cassegrain telescopes plus precision optics including including optical flats, Cassegrain, Catadioptric, Newtonian, Ritchey-Chretein, Mersen and other optical designs.…

Portable and permanent telescope piers in custom sizes and heights. Custom manufactures accessories for special customer needs.

Manufacturers of light weight large aperture Newtonian reflector telescopes. Designs feature substantial improvements over standard truss tube Newtonians.