Re: [APML] OT: M33

["Marco Lorenzi" <lorenzi70@tiscali.it>]

Dear Andreas, how did you processed the image? It seems you didn't push very
much the details considering the luminance from a CCD. For comparison here
is a similar L(ccd)RGB(film) image me and some friends did on the same
object this summer:
http://astrosurf.com/maremmateam/images/0309_starparty/m33.jpg
Luminance is from a mosaic of two 20 minutes frames made through a 8" f/4
Schmidt-Newton (Meade) so basically the same like you while Chrominance is
he stack of three 30 minutes shots at f/6.3... Definitely you should get
much more s/n from your images! Anyway the hybrid technique (CCD+FILM) is
quite interesting and promising...
Marco
Home Page http://www.astrosurf.com/lorenzi

----- Original Message -----
From: "Andreas Rörig" <apml@andreasroerig.de>
To: <astro-photo@seds.org>
Sent: Saturday, January 03, 2004 12:34 AM
Subject: [APML] OT: M33


> Dear list members,
>
> this is a image that has kept me busy during the last few month.
> Initially I had  planed to do a pure film composite of M33. So I shot
> several images on Provia 400 F and Kodak E200. After processing these
> images I was a bit disappointed from what I have got. So I decided to do
> a additional luminance image with the CCD. Due to the fact that M33 is
> large and the chip of my CCD is small it was clear it has to be a mosaic
> (I wanted some field around the galaxy). I shot a mosaic of 8 frames
> with my MX916 and the Vixen R200SS. Unfortunately I have not got very
> good conditions since the moment I planed the mosaic. I had to deal with
> poor transparency and very humid air.
>
> Anyway, here is what I got:
>
> http://www.andreasroerig.de/g1/m33.htm
>
> Luminance is unfiltered CCD.
> Color is from the film shots. So it is not completely OT I guess ;-)
>
> 6 shots on E200 and Provia 400F were stacked for the color information.
> The result was transfered to LAB mode and the luminance layer replaced
> by the CCD mosaic (after registering).
>
> This is my first attempt of a mosaic so I had severe problems to get rid
> of the seams of the single frames. I can't see them anymore on my CRT
> but they are still visible on my TFT.
>
> Ok, any comments are highly appreciated.
>
> Best regards
> Andreas
>
> :=================================
> : Andreas Roerig
> : Bahnhofstr. 16
> : 65599 Dornburg-Wilsenroth
> : Tel. 06436/28137
> : http://www.andreasroerig.de
> : (Letzte Aktualisierung: 15.12.2003)
>
>
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