Optics Suppliers and Manufacturers
JML Optical
Newport Corporation
Ross Optical (Rolyn Optics)
Edmund Optics
Newport Glass Works, Ltd
Schott Glass Technologies
IDEX Imaging and Illumination
Apex Optical Services
Davidson Optronics
Universe Optics
 

Professional Organizations & Publishers
The International Society for Optics and Photonics (SPIE)
Optical Society of America
Astronomy Magazine
Sky & Telescope 
 

Optics, Astronomy & Telescope Making Resources
The Astronomy Net
AstroGoods.com
Astromart New & Used Equipment
Frank UK Photo-Optics 
Telescopes.ru — Russian Optics
Sky Scientific Surplus Optics and Books
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Astronomical Organizations and Groups
San Jose Astronomical Association
Riverside Telescope Makers Conference
Golden State Star Party