Search found 4 matches
- Fri Feb 19, 2016 1:07 am
- Forum: The Observation Deck: Latest Sky Photography
- Topic: Submissions: 2016 February
- Replies: 156
- Views: 69676
Re: Submissions: 2016 February
http://www.mikeberthonjones.smugmug.com/Category/Wolf-Rayet/i-mTVpZF6/0/X2/Hershel%27s%20Ring%20Ha%205%20OIII%206%20SII%2010hrs-X2.jpg Copyright Mike and Trish Berthon-Jones Original image (2MB) at http://www.mikeberthonjones.smugmug.com/Category/Wolf-Rayet/i-mTVpZF6/0/O/Hershel%27s%20Ring%20Ha%205...
- Mon Feb 15, 2016 7:53 am
- Forum: The Observation Deck: Latest Sky Photography
- Topic: Submissions: 2016 February
- Replies: 156
- Views: 69676
Re: Submissions: 2016 February
http://www.mikeberthonjones.smugmug.com/Category/Supernova-Remnants/i-PNRQSML/0/X3/Pismis%204%20and%20SNR%20Dragon%20Ha%205%20OIII%2010%20SII%209-X3.jpg Original image: http://www.mikeberthonjones.smugmug.com/Category/Supernova-Remnants/i-PNRQSML/0/O/Pismis%204%20and%20SNR%20Dragon%20Ha%205%20OIII%...
- Thu Jun 12, 2014 8:46 pm
- Forum: The Library: Information Desk and Educational Resources
- Topic: What is a Nitrogen II filter good for?
- Replies: 3
- Views: 16092
Re: What is a Nitrogen II filter good for?
Thanks Chris and geckzilla. I'll have a look at both beasts.
Mike
Mike
- Thu Jun 12, 2014 8:36 am
- Forum: The Library: Information Desk and Educational Resources
- Topic: What is a Nitrogen II filter good for?
- Replies: 3
- Views: 16092
What is a Nitrogen II filter good for?
What can an [NII] filter tell me about the astrophysics of an object that I can't learn with H-alpha, [OIII], and [SII] ? So far, the few objects I've photographed through my 3 NM [NII] filter look exactly the same as they do in H-alpha. To try to make the pitch of my question more concrete, my very...