Celestron International
Several product lines of telescopes, binoculars, spotting scopes, microscopes and eyepieces, plus a large variety of accessories.

Meade Instruments Corporation
Several product lines of telescopes and accessories, eyepieces, CCD imaging equipment, astronomical software, spotting scopes, binoculars, and microscopes.

Steve's Eyepiece Cases
Beautiful, hand crafted Astro-Caddy eyepiece/accessory cases made from hardwood.

Company Seven Astro-Optics Division
Offers custom design and fabrication of astronomical telescopes. Manufactures automated mounts/tracking platforms. Provides in-house optical design and fabrication services, repair services. Dealer for a variety of product lines related to astronomy and other industries.

DGM Optics
Produces a unique unobstructed Newtonian reflector which features improved contrast and resolution compared to conventional Newtonians.

Jim's Mobile, Inc.
NGT line of portable, equatorially mounted astronomical telescopes. Also makes various accessories including Motofocus focus motors, Motodec declination motors, R.A. drive motors, computer control systems and NGF focusers.

Obsession Telescopes
Manufacturer of Dobsonian telescopes ranging from 12-1/2" to 30" in aperture. Optional accessories include the ServoCAT servo drive system which may be combined with the Argo Navis digital setting circles.

Mag 1 Instruments
Offers the PortaBall line of telescopes with apertures ranging from 8" to 14-1/2". These instruments feature a unique spherical housing around the primary mirror location which makes pointing the instruments very intuitive.

University Optics
Suppliers of astronomical accessories, binocular viewers, eyepieces, binoculars, telescope building supplies, software, books, and components to build a "Cookbook" CCD camera.

Astro-Physics Inc.
Telescopes, mounts and accessories for observers and astrophotographers.

AstroSystems
TeleKit Dobsonian telescope kits, equatorial platforms and altitude bearings for Dobsonians, focusers, collimating tools, telescope covers and other accessories.

Mountain Instruments
Telescopes and German equatorial mounts featuring DC servo motors and the Losmandy Gemini System with computer control using partial LX-200 emulation.

Brass Telescopes by The Glass Eye
Beautiful heirloom quality terrestrial and nautical brass telescopes, hand held travel telescopes and all weather telescopes.

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

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

Sky Valley Scopes
Offers very strong telescope tubes which feature a unique honeycomb construction. Site features basic plans and ideas for the home telescope builder.

D and G Optical
Offers optical supplies and equipment for astronomy-related sciences and persons interested in the astronomy field.

Dantronix Research and Technology, LLC
Makes Opticlean polymer for cleaning mirrors, lenses and corrector plates, and produces Laser Gold and Laser Rhodium mirrors for IR and scientific applications.

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

TeleVue Optics
Premium refractor telescopes, eyepieces, and accessories. Products include Nagler eyepieces, Panoptic eyepieces, Radian eyepieces, Plossl eyepieces, Barlows, Powermate, Ranger, 101, fluorite and apochromatic refractors.

California Tubular Designs
Artistically designed tubes for use in Dobsonian telescopes.

Insulated Dew Shield
Custom insulated dew shields for refractors and compound telescopes.

Sky Engineering
Designs and manufactures the Sky Commander product line of digital setting circles.

Discovery Telescopes, Inc.
Offers a complete line of Dobsonian reflectors up to 24" in aperture, plus optical primaries and elliptical flats.

TAURUS Technologies
Offers the TAURUS Tracker III combination flip mirror and off-axis guider for both film and CCD astrophotography, plus a sealed, self-hypering HyperCamera with direct-view focusing using any eyepiece.

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

T&T Binocular Mounts
Offers a full line of mounts and crutch tripods for comfortable, steady binocular viewing.

Stellarvue
Specializes in hand crafted refractors and apochromatic refractors. Offers telescope mount and tripods, spotting scopes plus a variety of accessories.

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

Cstar Optics
Product lines include small to medium aperture telescopes, binoculars, spotting scopes, educational tools and accessories.

B2B Sports Optics
Offers customer labeled telescopes and binoculars to a wide range of businesses as corporate gifts and promotional tools.

Starmaster Portable Telescopes
11" to 30" aperture portable Dobsonian telescopes featuring truss tube designs. Also offers the 12-1/2" ELGT telescope which includes the SkyTracker, providing goto and track capability.

Oberwerk Corporation
Produces a variety of binocular designs for both terrestrial and astronomical applications.

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

DFM Engineering, Inc.
Advanced amateur and professional astronomical telescopes, telescope control systems and mounts, electro-optical telescopes, LIDAR systems, heliostats, siderostats/coeleostats, telescope optics and beam directors.

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

Coronado Technology Group
H-Alpha and white light solar filters and accessories for telescopes, plus the Maxscope line of dedicated solar instruments.

NOVA Optical Systems
Optical company which manufactures telescope optics in a wide range of apertures for amateur and professional class telescopes. Site features the free Ultra-Trace telescope design program.

Thousand Oaks Optical
Solar filters, solar eclipse viewers, H-Alpha filters and nebular filters.

Telescope Electronics Repair Services
Repair services for Meade LX-200 series telescope electronics.

Teleport Telescopes
Offers portable Dobsonian telescopes which are designed to collapse down into an extremely compact cubes for transportation.

Kenyon Laboratories LLC
Binocular, medium format camera and cinema camera stabilizers, plus gimbals, gimbal mounts, and inverters.

Alpen Outdoor Corporation
Offers a variety of sports optics for the outdoor enthusiast. Products include binoculars and spotting scopes, including waterproof models.

Draco Productions
Economically priced beginner telescope kits which are suitable for children six years and older or as a family project. Accessories, eyepieces, Baader Solar Filter material and completed telescopes are also available.

Questar Corporation
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.

Astrometric Instruments
Provider of custom telescope control systems, including the SkyWalker servo telescope control system and SkyRad accessory controller.

Optical Mechanics, Inc.
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.

Blue Ridge Telescopes
Quality hand crafted amateur Dobsonian telescopes and parts.

Stellar Technologies International
Stiletto brand knife-edge focusers, wide-field adapters, plus accessories for 35mm, CCD, and medium format cameras.

Kendrick Astro Instruments
Products include the Dew Remover System, portable power packs, Kwik Focus masks, observer tents, shelter domes and observing chairs.

Classic Science Wood and Brass Telescopes
Hand-crafted wood and brass telescopes, designed in the spirit of the 18th century.

Infinity Scopes, LLC
Produces the Uti product line of extremely lightweight and portable Newtonian telescopes, computerized telescopes and digital setting circles.

Edmund Scientific
Produces the well known Astroscan telescope, plus telescope kits, Barlows, eyepieces, telescope accessories and a variety of science education kits.

Litebox Telescopes
Designs and manufactures portable Dobsonian telescope frames in the 12.5 to 18 inch aperture range.

AB Engineering, Inc.
Computer controlled telescopes, equatorial mounts with optional computer control, custom worm drive systems and custom accessories. Custom telescope retrofit and repair services.

Astro Works Corporation
Manufactures the Centurion 18 telescope system which features a focal ratio of f/2.8. These instruments are designed for moderately wide field CCD imaging applications and asteroid patrols.

EOS Technologies, Inc.
Offers turn-key observatory systems for astronomy and satellite laser ranging. Systems include telescopes and instruments, enclosures, integrated control systems and software for remote and autonomous operation.

Hollywood General Machining, Inc.
Produces the Losmandy product line of precision equatorial mounts, dovetail systems, the Gemini goto control system and a variety of telescope accessories.

Mathis Instruments
Full product line of German equatorial and telescope mounts with full computer control. Mounts are available for telescopes up to 24" aperture and feature tapered conic sections for increased rigidity.

Van Slyke Engineering
Versa-Port Sliders, Monster focusers, bifilar micrometers and turret eyepiece holders.

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

Optic-Craft Machining
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.

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

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

Roger W. Tuthill, Inc.
Produces a variety of accessories for amateur telescopes including Solar Skreen, No Du Caps, polar axis finders and isostatic mounts for many commercial telescopes.

ScopeCraft, Inc.
Produces the 24" SC-2048 turnkey scientific telescope system and the DriveScope stepper motor control system. Company also custom designs and manufactures complete telescopes, telescope mounts and optical tube assemblies.

Swift Instruments, Inc.
Refractor, reflector and Dobsonian telescopes; binoculars for birding, hunting, marine and long range applications; plus spotting scopes, microscopes, theater glasses and weather instruments.

True Technology Limited
English manufacturer of filter wheels, flip mirrors, filter units and dichroic filters.

ObservatoryScope Robotic Telescopes
Observatory class Folded Newtonian and Ritchey-Chretien telescope systems which use hybrid band-worm drives. Also manufactures LIDAR systems, tracking platforms and custom designed drive retrofits for existing telescopes.

Astronomical Consultants & Equipment, Inc.
Designs and manufactures research grade telescopes, finder-guiders, filter boxes and spectrographs, and products for observatory domes. Services include consulting, instrument relocation and retrofits.

Beta Electronics, Inc.
Useful laser pointers with remote on-off switches, suitable for use as a star finder on a telescope.

Collins Electro Optics, LLC
Manufactures the I 3 eyepiece visual image intensifier system which features TeleVue optics, and an optional CCD video adapter for real time display.

Denkmeier Optical, Inc.
Stereoscopic Binoviewers and Binoviewer accessories for low power, binocular viewing through telescopes.

E2 Telescope Design
Produces complete line of Dobsonian reflector telescope kits and accessories.

Equinox Interscience, Inc.
Manufactures complete telescopes, optical tube assemblies and telescope mounts. Company also offers a variety of design services and produces Deep Sky Black, a low reflectivity surface treatment suitable for aerospace applications.

Hutech Corporation
Manufactures the BORG line of telescopes, binocular scopes, spotting scopes and optical tube assemblies. Additional products include motorized altazimuth mounts and a variety of accessories.

Johnsonian Designs
Precision machined equatorial tracking platforms for Dobsonian and altazimuth telescopes. Company offers a very unique, lightweight 18" pop-up carbon fiber travel telescope with full goto capabilities.

Le Sueur Manufacturing Company
Produces the Astro Pier product line of telescope piers for fork mounted and German equatorial telescopes.

Learning Technologies, Inc.
Numerous science and education products including, but not limited to, the STARLAB Portable Planetarium, Project STAR hands-on science materials, the Sunspotter solar telescope plus a variety of learning curriculums.

Lumicon International
Products include Easy Guiders, hypered film and hyper kits, diagonals, the Sky Vector NGC, richfield viewers and many other accessories for amateur astronomers.

Moonlite Telescope Accessories
Extremely robust Crayford style focusers, focuser accessories, truss tubes and truss tube connector systems, plus telescope accent kits to personalize your telescope.

Clement Focuser
Uniquely designed, patented focuser for use on a variety of telescopes. Offers optional electric focus mechanisms for their focusers.

Compact Precision Telescopes
Uniquely designed, collapsible open frame telescopes and primary mirror cells which are CNC machined from aluminum.

R.F. Royce - Precision Optical Components
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.

Equatorial Platforms
Wood and aluminum motorized, low profile equatorial platforms for Dobsonian and other altazimuth telescopes. Various accessories including stepper motor control are available for astrophotography. Complete telescopes up to 28" aperture are also available.

Peterson Engineering Corp.
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.

PreciseParts
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.

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

SkyGear Telescopes
Travel Scope brand of medium sized Dobsonian telescopes with components CNC machined from Baltic birch cabinetry.

Universal Astronomics
Optical instrument mounts including the T-Mount, UniMount and UniStar for binoculars and telescopes. Retailer for a variety of other product lines.

Vixen North America
Telescopes and telescope mounts, binoculars, Lanthanum eyepieces and other accessories.

ATOZastro Forum
Alignment accessories and flexible dew shields for Meade ETX series telescopes and the Meade 497 Autostar.

RXDesign
ServoCAT telescope control systems and Argo Navis digital setting circles for Dobsonians and equatorially mounted telescopes.

Tau Ceti Company
Accessories for astrophotography including the Universal Camera Mounting Adapter for attaching cameras/telephoto lenses to telescopes, the XY Finder for guide scopes and CCD guide cameras, plus the Flip-Mirror Focuser for CCD cameras located at the telescope's prime focus.

Astrozap Dew Shields
Aluminum and flexible dew shields, caps and telescope covers for amateur telescopes. Many products are available in a variety of colors to match your telescope.

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

Dewzee Astronomy Products
Produces the Dew Zee line of dew control and light baffling shields for a wide variety of telescopes.

Hardin Optical
Astronomical telescope optics, oculars and accessories sold under the Astrola name. Company is owned by Larry Hardin, a former employee of Cave Optical.

Sky Time Inc.
Offers the unique Solunar Watch with numerous features for astronomers.

Meridian Telescopes
A variety of products, components and accessories for the amateur telescope builder. Also offers plans for building a telescope.

SkyPointer
Green laser pointers for aiming a telescope, plus a variety of pointer brackets and accessories.

HoTech Corporation
Products include the Astro Aimer, which features a green laser pointer for pointing telescopes, and a variety of red and white LEDs for map reading and general illumination at night.

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

Rigel Systems
LED flashlights for astronomy and aviation, astrophotography accessories, collimation tools, finders, motorized focusers and controllers, plus other accessories.

AILI Optics & Electronic Co., Ltd.
Manufacturer and exporter of spotting scopes, binoculars, optical lenses and elements, plastic lenses, enlarging and CCD lenses, optical mounts. Offers optical design services.

Astro Optics Pvt. Ltd.
Produces precision optical components, assemblies and small telescopes. Located in India.

Astronomy Optics
Offers a variety of binoculars and binocular stands. Features product lines for astronomy and birdwatching. Located in the U.K.

Astroparts
Camera adapters, web cam adapters, superwedge for Meade LX-200 classic series, mirror lock screws, focus bearing kits plus a variety of other accessories.

AstroTechniek
Designs and manufactures large telescopes and mounts, including the CP-165 telescope mount. Offers stepper motor control systems and small telescopes. Located in the Netherlands.

BC&F Astro Engineering
British manufacturer of a wide range of astronomical telescope accessories and astronomy related accessories including the GigaWedge and GigaPier for Meade 16" LX-200 scopes.

Bray Imaging Technologies, Ltd.
Manufactures the Teleport brand of Dobsonian telescope products for all markets outside North America. Offices located in the U.K.

Chongqing Shunjiang Industry & Trade Co., Ltd.
Chinese manufacturer of telescopes, binoculars, monoculars, rifle scopes, night vision equipment and disposable cameras.

Custom Telescopes UK
British company that manufactures telescopes, Newtonian mirror sets, eyepieces, and other accessories.

Eastcolight Limited
Hong Kong based educational manufacturer and exporter of small telescopes and microscopes.

GAMBATO Costruzioni per Astronomia
Italian manufacturer of observatories, planetariums and geodes. Offers observatory structure maintenance services.

Goto Optical Mfg. Co.
Japanese manufacturer of planetariums and telescopes.

Guan Sheng Optical Co., Ltd.
Taiwanese manufacturer of reflectors, refractors, Dobsonians, eyepieces, equatorial mounts and accessories.

Hioptic Military and Professional Outdoor Optics Company
Chinese manufacturer and exporter of military and outdoor optical systems. Product lines include spotting scopes, military binoculars ,astronomical telescopes, shooting & rifle scopes, military & professional compasses, night vision equipment plus other accessories.

Konus Italia Group
Italian manufacturer of telescopes, binoculars, spotting scopes, microscopes, compasses and magnifying glasses.

Lin Optics Co., Ltd.
Taiwanese manufacturer of small refractor and reflector telescopes, microscopes.

Long Perng
Taiwanese manufacturer of spotting scopes, field scopes, telescopes, and binoculars.

Medic Care (Far East) Co.
Chinese manufacturer of small telescopes, binoculars, spotting scopes. Also manufactures a variety of other products.

Mingca
Chinese manufacturer and exporter of telescopes, binoculars, spotting scopes, monoculars, microscopes and tripods.

North United Co., Ltd.
Chinese manufacturer of binoculars, telescopes, riflescopes, spotting scopes, night vision scopes, golf scopes.

Telescopes for Amateur Astronomers
Russian manufacturer of TAL brand telescopes including refractors, Newtonians, and Klevtsov modified Maksutov-Cassegrains; and additional products including binoculars, night vision equipment, riflescopes and many accessories.

Oldham Optical U.K.
Offers telescope accessories including mirrors, lenses prisms, and calibration equipment to the professional and amateur market. Site features excellent treatises on optical testing and terms used by opticians to describe optical quality.

Optical Development Workshop of Academy of Sciences
Czech Republic developer and manufacturer of optics elements and systems.

Starchair Engineering Pty. Ltd.
Australian manufacturer of motorized observing chairs which accommodate both the observer plus either binoculars or small telescopes.

Swarovski Optik
Austrian manufacturer of binoculars, telescopes, rifle scopes, night vision instruments, and tripods.

Task-Optic Binoculars
Wholesale manufacturer of binoculars, monoculars, goggles, sights, spotting scopes, photocameras, lenses, telescopes, microscopes.

Telescope Technologies Ltd.
British manufacturer of large turn-key robotic telescope systems. Additional products and services include engineering research and development, project engineering management, instrumentation, complete electro-optical systems, plus a number of engineering related services.

Wildcard Innovations Pty. Ltd.
Australian manufacturer of Argo Navis Digital Telescope Computer systems for alt-azimuth, fork and German equatorial telescope mounts.

Wins Binoculars and Telescopes
Chinese manufacturer and distributor of telescopes, binoculars, spotting scopes, rifle scopes and other optical instruments.

Advanced Optics Limited
Produces the Vanguard 500, a complete 20" Ritchey-Chretien Telescope system.

DAR Astro Machining
Products include mirror cells, helical and double helical focusers, eyepiece adapters, video camera adapters and eyepiece parfocal rings. Company is located in Canada.

Omega Optical, Inc.
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.

Ceravolo Optical Systems
Offers custom optics fabrication, design consulting and optical testing services for the scientific, industrial and astronomical communities.

Black Knight Telescopes
Produces lightweight, medium-aperture, Dobsonian telescopes.

Astro Optik
Large telescope systems including Hypergraphs, Deltagraphs, Cassegrains and Ritchey-Chretiens, Newtonians, Dobsonians and Schmidt cameras.

Precision Optics
Offers repair, cleaning and collimation services for binoculars, telescopes, rifle and spotting scopes. Specializes in repair of antique and military instruments.

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

Astrolite-LED
Offers red LED flashlights for the discriminating astronomer.

Ufind Optics Company, Ltd.
Chinese manufacturer and exporter of binoculars, telescopes, monoculars, golfscopes and spotting scopes.

43 Degrees South Astro
Produces solar filters and binocular mounts for amateur astronomers. Located in New Zealand.

Al's Custom Telescope Accessories
Produces oak tripods and accessories for Celestron's CG-5 telescope and CI-700 tripod, and for Meade's LXD55 telescope.

Nite I's
Visual astronomy accessories including adapters, eyepieces, extensions, eyepiece parfocalizers, plus telescopes, hardware, and software.

Accu View Optics
Chinese manufacturer and exporter of binoculars, monoculars and spotting scopes.

Keulco
Canadian manufacturer of collapsible binocular mounts which include the tripod.

Tectron Telescopes
Offers collimation tools including basic sight tubes, Chesire eyepieces and autocollimators.

Outman Outdoors USA
Produces a large product line of binoculars for nature study, boating, hunting, astronomy, surveillance and other applications. Site also features on-line factory direct sales.

Bellstar Telescopes
A Canadian owned and operated company that custom manufactures hand crafted Dobsonian telescopes. Also provides repair services for telescopes, binoculars and microscopes.

Phenix Optics - Jiangxi Optical Instrument
Hong Kong manufacturer of cameras, telescopes, binoculars, optical glass lenses, and other optical science equipment.

Eastern Shore Company
Concessionaire of coin-operated viewing machines, since 1973. Products include American-made coin-operated binoculars and telescopes.

ICAS Enterprises
Japanese manufacturer and exporter of optical filters for telescope and industrial use.

Nelson Devices
Produces Quick-Connectors to connect accessories to a variety of commercial telescopes. Site includes compatibility charts, example applications, and FAQ.

L & L Optical Services
Provides a wide range of thin film coatings, specializing in metallic and anti-reflection coatings. Experienced in cleaning and coating glass and metallic substates.

TECH2000
Produces the Giro altazimuth tripod mounts, Dobsonian and equatorial drive systems, laser collimators, equipment beacons for use at star parties, plus additional products. Exclusive USA distributor of ASM telescopes which feature lightweight ceramic mirrors.

Trico Machine Products
Makes the Sky Window binocular viewing system, and is a full machine shop specializing in design, prototype and production of quality machined parts.

AstroCards
Makes AstroCards finder charts, the AstroCards lighting system for viewing the cards at night, and offers a variety of other products.

1stBase
Produces collapsible Dobsonian mounts which fold up for storage and transportation. Mounts are available separately or sold with Compact Precision Telescopes tube assemblies.

Aeroquest Machining
Worm gear drives for the accurate tracking of deep space and planetary objects for viewing and imaging. Stepper and synchronous motor power systems are available.

Shanghai Olive Industries Co., Ltd.
Manufactures optical instruments including biological microscopes, stereo microscopes, telescopes and binoculars. Also produces electronic equipment and garden tools.

Starbuckets Telescopes
Builds premium truss-tube Dobsonian reflectors in small to medium apertures. These apertures fill the void in commercially available, small to mid-sized truss-tube Dobsonians.

De-Zhong Optics.
Professional Chinese optical products manufacturer and exporter, specializing in traditional binoculars, compact binoculars, zoom binoculars, waterproof binoculars, telescopes and microscopes.

Lightholder Optics
Newtonian mirrors made and certified in writing to the most exacting, demanding Millies LaCroix tolerance (1/8 wave at the wavefront), twice as precise as the industry 1/4 wave standard.

NPZ Optics State Corp.
Novosibirsk Instrument-making Plant is one of the leading Russian manufacturers of high quality optical equipment for law enforcement and civilian use, such as day/night vision sights, powerful binoculars and astronomical telescopes.

Agena AstroProducts
Affordable, quality telescope accessories and books for amateur astronomers.

Sharp Vision Scientific Company
Manufacturer of telescopes including refractors, catadioptrics and Newtonians. These instruments are suited for visual and educational applications. This company offers instruments in a variety of sizes and price ranges with product lines reminiscent of several U.S. and other companies during the 1960s and 1970s. Located in India.

Jinoscope
Dark Sky Laboratory produces telescopes which are individually manufactured to fit each customer's specific needs. Many parts of each customer's telescope are manufactured in house to assure quality control, and numerous options and customizations are available.

Rainbow Optics
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.

Armsun Canada
A Canadian sourcing, distribution and manufacturing of photographic, video and digital accessory products (OEM). Sales and reference site for Optisan binoculars.

Dream - Telescopes & Accessories
Offers advanced composite telescopes which utilize carbon fiber, Kevlar and honeycomb materials. Other products include Ritchey-Chretien telescopes, mirror cells, mounting plates and rings, and parts and accessories.

London Opera Glass Company
Manufactures, installs and services opera glasses within theatres. The service is free to theatres, and allows patrons to rent opera glasses during a performance.

Galileo's Place
Galileo's Place is the home of Galileo telescopes, binoculars, and accessories for telescopes and binoculars

Woden Optics
Manufactures Newtonian optical systems, all types of Cassegrain optical systems including an enhanced Ritchey Chretien optical system with integral field corrector, modified Wynn field correctors, plus optical tube assemblies and complete telescopes made from composite materials. Optical testing services are also available.

Ken's Rings
Manufactures tube rings, counterweights, mount saddle plates, guide scope adapter plates and dovetail plates. Also offers custom modified commercial telescopes.

Kokusai Kohki
Japanese OEM manufacturer of telescope accessories including WIDESCAN Type III Eyepieces, orthoscopic eyepieces, laser collimators, a "correct view" finder, a unique helicoid off-axis eyepiece holder for Lumicon giant EZ guiders and the "HERCULES" Equatorial Mount with go-to capability.

Taychert Telescopes
Produces Dobsonian telescopes in a variety of sizes. The company's FarStar telescope claims to be the lightest weight 18" Dobsonian telescope available from any manufacturer. This company also offers telescopes which are custom built per customer specifications.

GoTo & Tracking Systems
Custom made GoTo mounts which are designed to the customer's specifications, plus GoTo conversions of existing telescope mountings. Complete machining and fabrication services are also available.

Galaxy Optics
18" to 25" Newtonian optics for amateurs and scientists. Also makes diagonals and offers mirror testing, refiguring and coating services.

David Chandler Company
Quality software and publications for astronomy and astronomy education. Manufactures the Deep Space Navigator telescope to computer interface, motor drives for Dobsonian mounted telescopes, high resolution optical encoders, plus custom encoder mounting hardware.

Carl Zeiss International
Manufactures astronomical telescopes, observatories, domes, optics, focal plane instrumentation and LIDAR equipment. Company also manufactures products for healthcare, vision, measurment and analysis, research, sports, microelectronics, photography and projection applications.

LOMO America, Inc.
Amateur and professional telescopes, microscopes, spotting scopes, night vision devices and 35mm film cameras.

AstroFox: Astronomical Instruments
Specializes in the manufacture of 10" to 30" Newtonians and Folded Newtonians for amateurs, public observatories and universities. Company also sells primary mirrors with apertures up to 36".

AWR Technology
Offers simple and GOTO telescope drives, sidereal time clocks and other electronics equipment for astronomers.

Kunming Yuanda Optics
Chinese manufacturer of binoculars, monoculars, spotting scopes and telescopes.

AIM Controls, Inc.
Manufactures industrial laser systems and motion control products, precision and custom worm drives in a wide range of sizes and gear ratios, plus a complete line of telescopes, mounts, and control systems for astronomy.

APT Astro
Manufactures the AMF Equatorial Wedge, a very heavy duty equatorial wedge, for Meade & Celestron telescopes.

Chengdu SWOC Industries Co., Ltd.
Manufactures telescopes and binoculars, optical components including singlet, doublet, cylindrical and aspherical lenses, prisms and corner cubes, beamsplitters and waveplates, polarizers and coatings.

H. L. Clausing, Inc.
Provides mirror and optical coating services, and caters to the industrial, commercial and aerospace industries. Specializes in custom optical coatings on large substrates up to 92 inches in diameter.

Spectrum Coatings
Uses the Ion Assisted Deposition (IAD) process to produce hard, durable, oxide optical thin films without high temperature substrate heating. Offers many types of coatings including protected aluminum and enhanced aluminum for astronomical mirrors as well as other applications.

Infinite Optics
Provides thin film coatings and optics for science, medicine, aerospace, and military arenas. Also offers fabrication of optical components to exact specifications.

Custom Scientific, Inc.
Custom optics and interference filters with specialization in astronomical filters.