Quote:
Originally Posted by DougAdams
I've never really used filters - what exactly is a "NPB" filter - some sort of narrowband? I've been thinking about picking up a OIII and narrowband filter for nebula from Melbourne.
|
Thanks Doug. Re the "NPB" filter, look at this thread:-
http://www.iceinspace.com.au/forum/s...ad.php?t=22373
It's a DGM Optics Narrow Pass Band filter. I tried to get someone on IIS to part with theirs, but no way, they all said. That told me it was worth having. So I bought one new from the US. I like it.
I have the usual neutral density filters for the Moon (and even Jupiter at times!), a couple of coloured filters that came with the 2" neutral density filter when it was more worthwhile to buy a discounted set rather than the one, and a couple of polarising filters so I can "cross" them and make the full moon much darker than with the neutral density filter.
I think I now have all the filters I'll ever want for observing?