Re: [APML] New Image: IC 1805 with Nikon Lens

["Volker Wendel" <volker@spiegelteam.de>]

Hi Chuck, Gene, Rob,

> I have run the tests for my filters and LRGB makes pink nebulas so
> I don't think that's the problem. What I think the problem is that
> saturation needs to be increased along with Luminance. Increasing
> Luminance alone de-saturates the image.
>

This is exactly the problem. As you know Iīve done a lot of LRGB with Tech
Pan and color films, and all I can say is: donīt exaggerate the contrast and
the saturation of the luminance channel! Even if Iīve done this to every
LRGB we made in our Team, it was not possible to get the colors nearly
right. Two examples for this: IC410 (the bad one, we could not do it any
better, donīt know why):
http://www.spiegelteam.de/Galaktische%20Nebel/lrgb410.jpg and my two
favourites of our gallery: California-Nebula
http://www.spiegelteam.de/Galaktische%20Nebel/CarliforniaLRGB.jpg and the
Cone Nebula
http://www.spiegelteam.de/Galaktische%20Nebel/LRGBConusFullFr.jpg

> > Well, but that defeats the main selling point of LRGB.  Laziness <g>.
> > A proper colour CCD image takes far longer to expose than a film
> > image.  LRGB allows one to get the exposure times down to below
> > that which film requires.
>
> Yes, I am aware of that but I'd still like to see a real RGB.

There are a few outside and this is my favourite (320 minutes):
http://www.rcopticalsystems.com/gallery/catsm4.html

Volker
www.spiegelteam.de



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