We all know halo that surrounds bright stars and planets in the telescope. While I know where it comes from - chromatic aberration, scattering on lens/mirror surfaces, dirt and scratches, scattering in the optical path of the telescope, scattering by the atmosphere, scattering in the eye - I have very vague idea about the relative importance of those factors. Experience with many (types of) telescopes whould help here, and that's where I lack.
Any ideas? Refractors vs reflectors? Achromats vs apochromats? Newtonians vs catadioptrics? Eyepiece contribution?
Dmitri
Any ideas? Refractors vs reflectors? Achromats vs apochromats? Newtonians vs catadioptrics? Eyepiece contribution?
Dmitri
