Quote:
Originally Posted by mental4astro
28mm RKE, 25 to 30 year old design, no coma: $20
|
I own two of them and the amount of coma /distortion I see is proportional to how dark my enviroment is. With F4 Astroscan scope with ambient light and mediochre sky , the edge looks great as my 4 mm or so my eye pupil is stopping down the 7mm pupil of the F4 scope to an effective F7 scope . The edge doesn't look nearly as good to my fully adapted eye under a good dark sky with full pupil used.