Re: [APML] OT: Pleiades Mosaic

["Richard Crisp" <rdcrisp@earthlink.net>]

----- Original Message ----- 
From: "Steve" <sc02492@yahoo.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Tuesday, October 07, 2003 7:39 PM
Subject: [APML] OT: Pleiades Mosaic


> Hi group,
> 
> Here's a mosaic of M45 that I've been working on,
> taken with a Canon 10D digital camera:
> 
> http://www.starrywonders.com/pleiadessmall.jpg
> 
> A higher resolution image can be found at:
> 
> http://www.starrywonders.com/pleiadeslarge.jpg
> 
> I'm showing this on APML for 2 reasons.  First, I
> started astrophotography with film and learned a great
> deal from Jerry Lodriguss, Matt BenDaniel and others
> about image processing.  These techniques apply
> regardless of the medium that is used to take the
> shot.  Second, this represents a mosaic, and I learned
> this technique from the useful information present on
> Rob Gendler's website.  So although consumer digital
> cameras are somewhere in between film and CCD, the
> final common pathway for all of our shots is image
> processing, and I've learned a lot from this group.
> 
> Details:  This represents a total of 30 frames
> requiring about 3.5 hours of  exposure, taken with the
> Canon 10D at ISO1600 (6 to 9 minutes per 
> exposure), through the LX90 at f6.3, autoguided with
> the STV/e-finder. The mosaic was made with a total of
> 6 different sections of M45 (each section is an
> average stack of 5 frames). The frames for 
> each section were processed as follows: raw
> conversion, adaptive dark frame calibration,
> alignment, autograding, min/max excluded 
> averaging, and background compensation done in
> ImagesPlus; levels and curves adjustment in Photoshop;
> final smoothing done in Pleiades 
> SGBNR software. Mosaic was constructed in Photoshop
> using the  technique described by Rob Gendler. Total
> processing time was approximately 20 hours over a
> period of 3 days.
> 
> Hope you like it.
> 
> Steve Cannistra
> http://www.starrywonders.com


I like it a lot, Steve. Yes, it is that time of year again!
Richard
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