----- Original Message -----
Sent: Saturday, November 16, 2002 12:46
PM
Subject: Re: [APML] New images - M1, M31,
NGC281, NGC6888
Hi Mike,
First of all I have to say, that I use a german
version of Photoshop. So I hope you can find the functions by my
explinations.
In photoshop you can convert the image in grey by
changing the mode (RGB to grayscale) or you can choose the channal mixer (in
this function you can choose the amount of each color to produce a grayscale
image). With this function, I use only the red channel to produce a grayscale
version with more contrast. This image is now used in a new layer for
luminance. If you try this you will see, that the saturation of the colour
will decrease very much. So I do not set the luminance to 100%, it was 50%.
After that you have to increase the saturation of the image again.
You
can look at Robert Gendlers excellent homepage to see mor about those
techniques:
Look at the articles on the bottom of the start
page.
Manfred
----- Original Message -----
Sent: Saturday, November 16,
2002 4:46 AM
Subject: Re: [APML] New images
- M1, M31, NGC281, NGC6888
Manfred,
NGC 6888 is excellant, I like that one the best
also.
What was your process for the artificial L
layer ? I'd like to try it.
----- Original Message -----
Sent: Saturday, November 16,
2002 9:30 AM
Subject: [APML] New images -
M1, M31, NGC281, NGC6888
Hi all,
I've uploaded some new images, all done with
my VIXEN VC200L on KODAK E 200.
The core of M31, a composit of three
different exposures - 120, 45 and 20 min:
M 1, 150 min:
NGC 281, 180 min:
NGC 6888, 180 min with IDAS LPR:
On NGC 281 and NGC 6888 I made a artificial
luminance layer from the red channel. That helped me to bring out the
faint details.
Comments are wellcome,
Manfred