All About Optics
   Advice about selecting optics for birding and reviews of binoculars and spotting scopes. Sponsored by Eagle Optics.
   http://www.allaboutoptics.com/

Better View Desired
   Birding optics reviews, articles, manufacturers, and retailers.
   http://betterviewdesired.com/

Bird Watcher's Digest: OpticsFinder
   Collection of articles from the magazine on all aspects of buying binoculars and spotting scopes.
   http://www.birdwatchersdigest.com/optics/optics_index.html

BirdScope
   Information about birding with Tele Vue telescopes, with telescope and accessory selection guides, specifications, reviews, usage notes, and dealer list.
   http://www.televue.com/birdscope/

Birding Optics: Binoculars and Scopes
   Articles by Michael and Diane Porter on how to choose and use them, comparison charts of top brands, and how they work.
   http://www.birdwatching.com/optics.html

Eagle Optics
   Mail-order company offering a complete selection of binoculars, spotting scopes, telescopes, tripods, and accessories. Articles about birding and buying optics for birding.
   http://www.eagleoptics.com/

Optics4Birding
   Sells binoculars, scopes, and tripods. Site includes reviews of binoculars, spotting scopes, and tripods, also night vision binoculars, monoculars, and camera binoculars; articles on optics basics and how to choose the best optics for your needs; and a bu
   http://www.optics4birding.com/

WorldTwitch - Binoculars and Spotting Scopes for Birding
   Comparison of popular binoculars and telescopes used by birders, with recommendations.
   http://www.worldtwitch.com/optics.htm