Re: [APML] Messier Index

[Sean Walker <vze2c3z8@verizon.net>]

I can :-)
http://people.ne.mediaone.net/jeboud/ccd_m57.htm
when combining film and CCD images, you first need to register the images
together. Second, you most likely will notice the star images in the film
image will be much larger than your CCD image, owing most likely to
halation
in the emultion and the long exposure of the film image compared to the
relatively short exposure(s) on the CCD. i shrink the film stars in maxim
DL
by applying an erosion filter, usually at the 3x3 radius. I then bring
both
images into Photoshop, blur the color shot then paste the CCD grayscale
image as "luminosity". A great step by step article on LRGB combining in
photoshop was published in the July issue of Sky & Telescope by Robert
Gendler. it can also be found on his web site:
http://robgendler.astrodigitals.com/LRGB.html

Hope this helps!

Sean Walker



Volker Wendel wrote:

> Hi Mark,
>
> I think Sean Walker and John Boudreau mixed color information from film and
> luminance information from ccd to get a LRGB of M57. Sorry, I cannot give
> you the link to the image.
>
> Volker
> www.spiegelteam.de
>
> ----- Original Message -----
> From: "Mark Park" <mark_park@hotmail.com>
> To: <astro-photo@seds.org>
> Sent: Monday, September 17, 2001 8:04 PM
> Subject: [APML] Messier Index
>
> > Here is a link to M77.  It is a CCD image.  I exposed several film frames
> on
> > M77 this weekend and hope to have them processed and added to this page
> > soon.  However, since it took a 60min ccd image to bring out the spiral
> > arms, I don't hold out much hope for the 90min exposures on E200 and Fugi
> > X-tra 800.  We'll see...
> >
> > Anybody out there have any experience with using film for RGB and ccd
> images
> > for L in LRGB?  I may try this on M77 and could use some pointers.
> >
> > Thanks...
> > Mark Park
> > Mark_park@hotmail.com
> > AstroPhoto Page:http://www.wilkes.net/~tspark/astrphts.htm
> > Home Page: http://www.wilkes.net/~tspark/
> >
> >
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