----- Original Message -----
Sent: Saturday, November 20, 2004 12:21
PM
Subject: Re: [APML] OT: IC5146 Cocoon
Nebula in Ha Light
I agree with you Stuart, about needing more
exposure. I only stopped when I did because it wound up in the trees in my
backyard. My western sky has lots of trees in it.
Maybe the weather will cooperate tonight and I
can get some more data to help smooth it out.
----- Original Message -----
Sent: Saturday, November 20, 2004 5:45
AM
Subject: Re: [APML] OT: IC5146 Cocoon
Nebula in Ha Light
Richard, I think it is pretty good but given
the image scale I would think there is more detail to tease out of it. My
shot (humble for sure) here: http://www.astrofoto.ca/stuartheggie/ccd_photos/Cocoon_CCD.html was
also a Schuler H-Alpha filter but 13nm. I shot 120 minutes at f/4. You are
at only 220 minutes at F/12.46 so I think you would need more signal if you
were to push the processing hard. Just a hunch though, you are way more
expert than I.
Stuart
----- Original Message -----
Sent: Saturday, November 20, 2004
8:32 AM
Subject: [APML] OT: IC5146 Cocoon
Nebula in Ha Light
this was shot at 0.64 arc-sec/pixel from the
18" Classical Cassegrain (F=5760mm, f/12.46) with an IMG6303E camera
binned 2x2
the image is 11 x 20 minutes through a
Schuler Halpha filter (9nm FWHM): 3hrs 40min total
Guiding was via AO7 /ST7e via an RCOS
Dichroic Beam Splitter
I didn't do any deconvolution, perhaps I
should have: what do you think?
Richard
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