INSIDE This Issue Specialty astronomy equipment dealers and manufacturers are an important resource for amateur and professional astronomers alike - patronize our advertising dealers in this issue and enjoy all the benefits of their expertise. Product Locator BINOCULARS FILTERS Tele Vue Optics, Inc. (Cover 2) Sky-Watcher USA (Pages 8-9) Astro-Physics (Page 81) TeleVue.com SkyWatcherUSA.com Astro-Physics.com 845-469-4551 310-803-5953 815-282-1513 TELESCOPES CAMERAS Stellarvue® (Cover 3) Diffraction Limited (SBIG Aluma) (Page 79) Stellarvue.com 530-823-7796 diffractionlimited.com/AC4040 613-225-2732 Sky-Watcher USA (Pages 8-9) SkyWatcherUSA.com 310-803-5953 EYEPIECES Sky-Watcher USA (Pages 8-9) SkyWatcherUSA.com Astro-Physics (Page 81) Astro-Physics.com 815-282-1513 MOUNTS iOptron (Page 77) iOptron.com iOptron (Page 77) iOptron.com Sky-Watcher USA (Pages 8-9) Sky-Watcher USA (Pages 8-9) SkyWatcherUSA.com SkyWatcherUSA.com 310-803-5953 310-803-5953 Stellarvue® (Cover 3) 310-803-5953 Software Bisque (Cover 4) Stellarvue.com Stellarvue® (Cover 3) Bisque.com 530-823-7796 Stellarvue.com 303-278-4478 530-823-7796 Tele Vue Optics, Inc. (Cover 2) Stellarvue® (Cover 3) TeleVue.com TeleVue.com Stellarvue.com 845-469-4551 845-469-4551 530-823-7796 Tele Vue Optics, Inc. (Cover 2) To advertise on this page, please contact Tim Allen at 773-551-0397, or Ads@skyandtelescope.org 82 JANUARY 2 021 * SK Y & TELESCOPEhttp://www.televue.com http://www.skywatcherusa.com http://www.astro-physics.com http://www.stellarvue.com http://www.astro-physics.com http://www.diffractionlimited.com/ac4040 http://www.ioptron.com http://www.skywatcherusa.com http://www.ioptron.com http://www.skywatcherusa.com http://www.skywatcherusa.com http://www.skywatcherusa.com http://www.stellarvue.com http://www.bisque.com http://www.stellarvue.com http://www.televue.com http://www.stellarvue.com http://www.televue.com