If anyone is curious what objects are good to look at with a H-Beta filter, here's an interesting website of filter information. The author made a lot effort and kept good records to come up with this. DT http://pages.sbcglobal.net/raycash/filters.htm --- On Fri, 4/10/09, erikhansen@TheBlueZone.net <erikhansen@TheBlueZone.net> wrote:
From: erikhansen@TheBlueZone.net <erikhansen@TheBlueZone.net> Subject: Re: [Utah-astronomy] Hydrogen-beta filters To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Friday, April 10, 2009, 8:04 AM
Hi Chuck,
I have a 2" H-beta (Lumicon) seems most nebulae it is good have large apparent field. The only time I have bought a 1 1/4 is when the threads on the 2 inch filters don't thread into my 1 1/4-2 inch adapter (Orion filters).
You can borrow mine for a few weeks if you would like to.
Erik
I'm going to add a Hydrogen-beta filter to my equipment this season,
and am asking for experiences with various brands/sizes. I realize that the list of objects it is useful on is very small; I have used borrowed H-b filters in the past. I only want to purchase one size. 1.25" or 2"? I have my own opinion but would like to read others before I spend my money.
TIA!
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Daniel, thanks for the link to that list, very helpful info. --- On Fri, 4/10/09, daniel turner <outwest112@yahoo.com> wrote:
From: daniel turner <outwest112@yahoo.com> Subject: Re: [Utah-astronomy] Hydrogen-beta filters To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Friday, April 10, 2009, 3:09 PM If anyone is curious what objects are good to look at with a H-Beta filter, here's an interesting website of filter information. The author made a lot effort and kept good records to come up with this.
DT
http://pages.sbcglobal.net/raycash/filters.htm
--- On Fri, 4/10/09, erikhansen@TheBlueZone.net <erikhansen@TheBlueZone.net> wrote:
From: erikhansen@TheBlueZone.net <erikhansen@TheBlueZone.net> Subject: Re: [Utah-astronomy] Hydrogen-beta filters To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Friday, April 10, 2009, 8:04 AM
Hi Chuck,
I have a 2" H-beta (Lumicon) seems most nebulae it is good have large apparent field. The only time I have bought a 1 1/4 is when the threads on the 2 inch filters don't thread into my 1 1/4-2 inch adapter (Orion filters).
You can borrow mine for a few weeks if you would like to.
Erik
I'm going to add a Hydrogen-beta filter to my equipment this season,
and am asking for experiences with various brands/sizes. I realize that the list of objects it is useful on is very small; I have used borrowed H-b filters in the past. I only want to purchase one size. 1.25" or 2"? I have my own opinion but would like to read others before I spend my money.
TIA!
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
Yes, thanks Daniel, that is good info. Just bear in mind that the author conducted his tests under "dark skies"; that is, when interference filters are least needed. Under the compromised skies that we tend to spend most of our eyepiece time under, I'm sure that contrast gains would be better than he notes, in many cases. I would be interested in a similar project done under SPOC-ish skies.
participants (3)
-
Chuck Hards -
daniel turner -
Richard Tenney