Re: [APML] Sh2-1 (2nd try)

[lkt <tan@cox.net>]

Chris,

 Thanks. I have been using a W92 filter for red for a while. It has a
slightly higher low cutoff wavelength than the W25. My thoughts are that
the W92 filter makes very little difference in the final color accuracy
vs. the W25 for objects which are mostly blue and red. Objects such as
the Antares region with strong yellow components will exhibit a color
shift. I could be wrong about this. My main reason for using the W92 is
to go very deep into the h-alpha regions. As such I am trading off color
accuracy for depth. Why wait for an observatory?, the 8" schmidt is
quite light and portable. I look forward to seeing your Schmidt work,
there are more objects than I have time for. Some of the dark nebulae
regions could be very spectacular.

Loke



Chris Schur wrote:
> 
> Loke, thats a spectacular region!  The blues really are separate nebulas
> from the more diffuse reds.  I noted your using a W92 for the R channel.
> does that present any problems for RGB combining?  I am probably within a
> month or two of getting my 8 inch schmidt set up in its own observatory, and
> your work has been a driving force for me to quicken my pace.
> 
> Chris Schur
> 
> Astrophotography: http://www.psiaz.com/schur/astro/index.html
> 
> -----Original Message-----
> From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
> Behalf Of lkt
> Sent: Thursday, June 27, 2002 3:30 PM
> To: astro-photo@seds.org
> Subject: [APML] Sh2-1 (2nd try)
> 
> Hello,
> 
>  Last new moon I got a chance to reshoot Sh2-1 to better frame it versus my
> last attempt. This shot shows more of the nebulosity around Delta Scorpius.
> My previous attempt had this star off to the corner of the frame. This shot
> also shows a hint of blue reflection nebulosity around this star. Most of
> the stuff here is quite faint.
> 
> http://www.starryscapes.com/nebula/sh2-1.html
> 
> Loke
> 
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