Italian manufacturer of observatory and transportable Newton telescopes, mirrors, blanks and tools.

Specializes in design and manufacture of Ritchey-Chretien telescopes for professional and amateur astronomers. Designs feature composite construction for thermal stability and reduced weight.

Offers the Star Spectroscope line of spectroscopy instruments for use with any telescope. Products are excellent for educational use, demonstrating the scientific information which can be gleamed from examining the spectrum of "black body" radiation sources such as stars.

Compound reflective optical systems including Cassegrain, Ritchey-Chretien, Dall-Kirkham and various modifications. Refractive systems including achromatic and apochromatic objectives and full aperture corrector catadioptric systems including Schmidt, Maksutov and Houghton types along with near focal corrector systems. Also produces off-axis mirrors.

High quality Maksutov Catadioptric telescopes for astronomy, nature, science and surveillance applications. Entire product line features superior optical performance, machining and finish. Established in 1950.

Professional-grade diagonal mounts and secondary mirrors, with unique features, for use in small to large telescopes.

Custom telescope parts and one-of-a-kind components, designed and machined in aluminum, stainless steel, brass, bronze, titanium, Teflon. Re-manufactures hard to find replacement parts for vintage telescopes. Can design new parts per customer specifications.

PlaneWave designs and manufactures astrograph telescopes for portable use as well as permanent installations.

Buck's precision gears for LX-200s, EZ Balance counterweights, EZ Clutch and EZ Focus kits, Eye Opener visual backs, and Mounting Assistant plates for attaching telescopes to tripods.

Optical manufacturer of parabolic primary mirrors and elliptical diagonals for astronomical telescopes. Available primary sizes range from 12-1/2" to 25".

Newtonian and Newtonian-Cassegrain reflecting telescopes, optical tube assemblies, telescope making components, binoculars, spotting scopes and microscopes, plus eyepieces and accessories.

Newtonian and classical Cassegrain astronomical telescopes, German equatorial mountings, tripods and custom portable or permanent observatory welded steel piers.

Home of the Sky-Watcher brand of astronomical refractors and reflectors, catadioptric Newtonians, Maksutov-Cassegrains, plus spotting scopes, mounts, eyepieces and accessories.

Manufacturer and distributor of Sky-Watcher refractors, reflectors, dobsonians, catadioptrics, spotting scopes, binoculars, mounts, eyepieces, motor drives and finderscopes.

Canadian distributor of a variety of optical products which are produced in Asia. Product lines include binoculars, riflescopes, spotting scopes, telescopes, loupes and magnifiers, medical optical instruments and night vision equipment.

Produces, using a patented casting technique, low cost diffraction limited replica optical mirrors for astronomical and other applications.

Fabricates research-quality Newtonian, Cassegrain, Ritchey-Chretein and custom optics, opto-mechanical instruments including LIDAR systems and collimators. Manufactures the Nighthawk line of advanced robotic telescopes plus custom telescopes. Offers optical design and mirror testing services.

Research-grade, observatory class telescope systems for professional and discriminating amateur astronomers, plus custom designed instrumentation for specific needs.

Czech Republic developer and manufacturer of optics elements and systems.

Offers a variety of complete German equatorial telescope mounts for telescopes up to 20" in aperture. Also manufactures precision clock drives featuring worm gears up to 24" in diameter.

Photometers, telecompressors, electric Crayford style focusers, filter wheels and filters, and optical couplers for video microscopy.

Designs and manufactures custom astronomy filters and prescription sets, for a wide variety of university programs, observatories, government agencies, and international consortia. Develops solutions for the spectral, optical, and environmental demands of each filter application.

Canadian manufacturer of spotting scopes and rifle scopes, binoculars, eyepieces, telescopes, accessories and tripods.