Baader 6 Colour Filter Set 12" The second edition of Stephen

The second edition of Stephen James O'Meara's acclaimed observing guide to the Messier Objects features improved star charts for helping you find the objects

Fully computerized Altazimuth mount

and resulting loss in contrast

25" barrel

Solar or Sidereal

Baader 6 Colour Filter Set 12" The second edition of StephenBaader 6 Colour Filterset 1. 25" or 2" With all substrates fine optically polished. These filters by far supersede the mediocre quality of common `flame polished` color filters. Fine optical polish and 2 mm thickness allows these filters to be inserted anywhere into the optical path without introducing astigmatism or other defects. For instance they can be used in front of a binocular viewer without degrading the image in any way. Substrates are free