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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