Quote:
Originally Posted by skysurfer
Well, I have a small 1.25" Lumicon UHC filter, but it vignettes in my 24mm ep. So I want to buy another one of 2". I take an OIII or H beta also as an alternative. Even higher contrast and a H-beta even should show the Horsehead and California nebula. After reading this CN article discouraged me from H beta and I prefer a UHC again. I'll use it with:
40cm Dobson at home, moderately light polluted and 10cm Genesis or 15x70 binos on a dark location.
What would you recommend? |
This might help:
http://www.eyepiecesetc.com/Choosing...-explained.htm
If you buy just one: the UHC.
If you buy a second filter for more specialized use: An O-III
If you have money to burn for a handful of objects: H-Beta.
Lumicon is the "Gold Standard", but there are other good filters.
To see comparisons in spectral charts, see:
http://www.karmalimbo.com/aro/pics/filters/narrow.jpg
http://www.karmalimbo.com/aro/pics/filters/o3a.jpg
http://www.karmalimbo.com/aro/pics/filters/o3b.jpg