Meade

They sell a wide range of telescopes including SCT, refractors, and solar telescopes. They have donated things to the LAAS. Consider shopping there.

Celestron

Meade's biggest competitor. They have donated things to the LAAS. Consider shopping there.

OPT

They sell lots of astronomy parts and scopes. Many members shop here. They have made donations to LAAS.

Woodland Hills Telescopes

Big seller of scopes and binoculars.

Televue

Supplier of high end refractors and eyepieces.

Astro Hutech

Astronomy, Birding, and Infrared. Nicely machined products.

Advanced Telescope Systems

Maker of fixed and portable telescope piers. Very stable.

Darksky Dreams

Nocturnal photography. Very pretty stuff.

Firefly Books

One of the best places on earth to purchase Astronomy related books. Go here to get your astro-books!

Kennedy Optics

If you have always wanted that 28" or larger mirror, this is a place to check out.

Lumicon

A great place to buy a wide range of filters and accessories.

Sky and Telescope

This company publishes Sky and Telescope magazine (goes back decades in astronomy) as well as many other guides and equipment for amateur astronomy.

Scope City

A one stop shop for all of your telescope and binocular needs. Very comprehensive and inexpensive. Many local stores to visit in person. They have made contributions to LAAS.

Telescopes.com

A one stop shop for all of your telescope and binocular needs. Very comprehensive. Equipment ranging from inexpensive to expensive high end.

Stellarvue

Specializing in handcrafted achromatic and apochromatic refractors. Fine telescopes.

FotoSearch

This is a searchable Stock Photography site that has pictures for sale related to Astronomy and other things.

goin2travel

A site with a real estate focus, but with a number of links to other sites of possible interest to amateur astronomers.

Can Stock Photos

Stock photography site, including some astronomy stock images

Optics Planet

Binoculars.com