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 TELESCOPES SkyWatcher (Cover 2) Alluxa (Page 1) Astro-Physics (Page 81) SkyWatcher.com 310-803-5953 Alluxa.com Astro-Physics.com 815-282-1513 Stellarvue® (Cover 3) CAMERAS Stellarvue.com 530-823-7796 Diffraction Limited (SBIG) (Page 69) Diffractionlimited.com 613-225-2732 QHYCCD/Light Speed Vision Co., Ltd. (Page 3) QHYCCD.com MOUNTS iOptron (Page 69) iOptron (Page 69) iOptron.com SkyWatcher (Cover 2) SkyWatcher.com 310-803-5953 iOptron.com Stellarvue® (Cover 3) Software Bisque (Cover 4, Page 5) Stellarvue.com 530-823-7796 Bisque.com 303-278-4478 EYEPIECES Stellarvue® (Cover 3) Stellarvue.com 530-823-7796 To advertise on this page, please contact Tim Allen at 773-551-0397, or Ads@skyandtelescope.org 82 JUNE 2 021 * SK Y & TELESCOPEhttp://www.alluxa.com http://www.skywatcher.com http://www.astro-physics.com http://www.stellarvue.com http://www.ioptron.com http://www.skywatcher.com http://www.diffractionlimited.com http://www.ioptron.com http://www.stellarvue.com http://www.qhyccd.com http://www.bisque.com http://www.stellarvue.com