FreeLists / az-observing / [AZ-Observing] Re: NGC206 Enhanced Hydrogen Comparison

["Jimmy Ray" <jimmy_ray@xxxxxxx>]

Aw, there's probably one sitting in the "Clark's" eyepiece case right now.
Maybe they'll let you borrow it. BTW- Brian I'm reading (and about 3/4 of
the way through) "The Explorers of Mars Hill". Are you going to make a cameo
appearance some where in there before I reach the end???

Jimmy Ray

-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx]On Behalf Of Chris Schur
Sent: Tuesday, December 12, 2006 1:03 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: NGC206 Enhanced Hydrogen Comparison


Brian, to do that, I would need of course a red filter
that excludes hydrogen alpha.  My current R filter
lets it all in.  Custom Scientific makes such a
filter, they call a "continuum" filter.  Alls it takes
is money... ;)

Chris
--- Brian Skiff <bas@xxxxxxxxxx> wrote:

>      Have you tried getting a 'pure' H-alpha image?
> That is,
> make a composite that consists of the H-alpha image
> _minus_ the R image
> to take out the red continuum from stars.
>
> \Brian
> --
> See message header for info on list archives or
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>
>


Take Care,

Chris
Astro: http://www.schursastrophotography.com
Robotics: http://www.schursastrophotography.com/roboticsmain.html



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