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ASTRO: M1 color composition



 
 
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  #1  
Old January 9th 08, 08:30 PM posted to alt.binaries.pictures.astro
DvandenH
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Posts: 143
Default ASTRO: M1 color composition

Hi all,
M1
Composition of:
10x 120 sec Halpha
10x 120 sec OIII
8 x 120 sec Blue
20 x 90sec luminance.
Stacked in maxim and CS3.
10" @ f/6.3
camera was at -25degrC
No autoguiding.

reg
Dirk van den Herik

A journey of thousand lightyears
starts with the first step.
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ID:	1584  
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  #2  
Old January 10th 08, 12:12 AM posted to alt.binaries.pictures.astro
John N. Gretchen III
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Posts: 460
Default ASTRO: M1 color composition

Looks really nice Dirk! Nice work!

DvandenH wrote:
Hi all,
M1
Composition of:
10x 120 sec Halpha
10x 120 sec OIII
8 x 120 sec Blue
20 x 90sec luminance.
Stacked in maxim and CS3.
10" @ f/6.3
camera was at -25degrC
No autoguiding.

reg Dirk van den Herik

A journey of thousand lightyears starts with the first step.

------------------------------------------------------------------------


--
John N. Gretchen III
N5JNG NCS304
http://www.tisd.net/~jng3
  #3  
Old January 10th 08, 02:15 AM posted to alt.binaries.pictures.astro
Richard Crisp[_1_]
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Posts: 985
Default ASTRO: M1 color composition



"John N. Gretchen III" wrote in message
m...
Looks really nice Dirk! Nice work!



I agree, looks very cool Dirk

It looks a bit dark on my monitor but that's easily cured




  #4  
Old January 10th 08, 07:12 PM posted to alt.binaries.pictures.astro
DvandenH
external usenet poster
 
Posts: 143
Default ASTRO: M1 color composition

Hey thanks guys!
I will try to lighten it up a bit....

--
Dirk

"John N. Gretchen III" wrote in message
m...
Looks really nice Dirk! Nice work!

DvandenH wrote:
Hi all,
M1
Composition of:
10x 120 sec Halpha
10x 120 sec OIII
8 x 120 sec Blue
20 x 90sec luminance.
Stacked in maxim and CS3.
10" @ f/6.3
camera was at -25degrC
No autoguiding.

reg Dirk van den Herik

A journey of thousand lightyears starts with the first step.

------------------------------------------------------------------------


--
John N. Gretchen III
N5JNG NCS304
http://www.tisd.net/~jng3


  #5  
Old January 10th 08, 08:23 PM posted to alt.binaries.pictures.astro
DvandenH
external usenet poster
 
Posts: 143
Default ASTRO: M1 color composition

Here same image only little brightend up...

Hope you like it

Dirk

"DvandenH" wrote in message
bel.net...
Hi all,
M1
Composition of:
10x 120 sec Halpha
10x 120 sec OIII
8 x 120 sec Blue
20 x 90sec luminance.
Stacked in maxim and CS3.
10" @ f/6.3
camera was at -25degrC
No autoguiding.

reg
Dirk van den Herik

A journey of thousand lightyears
starts with the first step.


Attached Thumbnails
Click image for larger version

Name:	M1_color.jpg
Views:	76
Size:	234.8 KB
ID:	1585  
  #6  
Old January 11th 08, 12:42 AM posted to alt.binaries.pictures.astro
Ralph Hertle
external usenet poster
 
Posts: 1,193
Default ASTRO: M1 color composition

DvandenH:

The images are beautiful to see.

I am a new guy to celestial imaging, however, I have lots of visual and
computer imaging skills.

From my lurker's viewpoint I find that the lightened version has lots
more bluish white in the central area, however, the structures visible
that are green in the former image are not visible in the lightened version.

The bluish white image shows a little more at the edges of the
structure, and that is always an area of interest to me. I try to see
the extent of the object, and I am always suspicious of images of
galaxies that have a sudden cut off of light at the outer edges. On the
other hand maybe the objects do in fact have a more pronounced boundary
edge and do not fade gradually at the greater edges.

The bluish white version has better background blacks, and more visible
tiny stars, however, all the stars are wider and appear to be slightly
out of focus.

The bluish white version doesn't appear to be a lightened version with
greater visible light intensities. Did you raise the visible intensities
of some filtered images and not others? Also, if the bluish white
version is slightly out of focus does not that ruin some of the
modulations of the lighter lights?

My computer graphics card and monitor can display 255^3 possible color
hues, and it has [claimed and not possibly actual] 1000:1 displayed
steps of contrast. What I often do is to plug in my big high-res CRT
monitors that do not have deep blacks and that have lots better faded
visible contrast areas than the LCD screen monitors.


Ralph Hertle
  #7  
Old January 11th 08, 02:07 AM posted to alt.binaries.pictures.astro
George Normandin[_1_]
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Posts: 1,022
Default ASTRO: M1 color composition

"DvandenH" wrote

Great image Dirk!

George N


  #8  
Old January 13th 08, 12:24 PM posted to alt.binaries.pictures.astro
DvandenH
external usenet poster
 
Posts: 143
Default ASTRO: M1 color composition

Ralph thx for your review,
Hereby a version that's a bit more normalized....the green is OIII lines,
the red the HAlpha line.
I am still trying to get the touch on color imaging with multiple layers so
pls if yoy have any tips post them.

Thx
Dirk

"Ralph Hertle" wrote in message
...
DvandenH:

The images are beautiful to see.

I am a new guy to celestial imaging, however, I have lots of visual and
computer imaging skills.

From my lurker's viewpoint I find that the lightened version has lots more
bluish white in the central area, however, the structures visible that are
green in the former image are not visible in the lightened version.

The bluish white image shows a little more at the edges of the structure,
and that is always an area of interest to me. I try to see the extent of
the object, and I am always suspicious of images of galaxies that have a
sudden cut off of light at the outer edges. On the other hand maybe the
objects do in fact have a more pronounced boundary edge and do not fade
gradually at the greater edges.

The bluish white version has better background blacks, and more visible
tiny stars, however, all the stars are wider and appear to be slightly out
of focus.

The bluish white version doesn't appear to be a lightened version with
greater visible light intensities. Did you raise the visible intensities
of some filtered images and not others? Also, if the bluish white version
is slightly out of focus does not that ruin some of the modulations of the
lighter lights?

My computer graphics card and monitor can display 255^3 possible color
hues, and it has [claimed and not possibly actual] 1000:1 displayed steps
of contrast. What I often do is to plug in my big high-res CRT monitors
that do not have deep blacks and that have lots better faded visible
contrast areas than the LCD screen monitors.


Ralph Hertle


Attached Thumbnails
Click image for larger version

Name:	M1_norm.jpg
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  #9  
Old January 13th 08, 11:14 PM posted to alt.binaries.pictures.astro
Stefan Lilge
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Posts: 2,269
Default ASTRO: M1 color composition

Dirk,

a bit more exposure time would be nice, but detail and colour both look very
good.

Stefan

"DvandenH" schrieb im Newsbeitrag
bel.net...
Hi all,
M1
Composition of:
10x 120 sec Halpha
10x 120 sec OIII
8 x 120 sec Blue
20 x 90sec luminance.
Stacked in maxim and CS3.
10" @ f/6.3
camera was at -25degrC
No autoguiding.

reg
Dirk van den Herik

A journey of thousand lightyears
starts with the first step.


  #10  
Old January 13th 08, 11:58 PM posted to alt.binaries.pictures.astro
John N. Gretchen III
external usenet poster
 
Posts: 460
Default ASTRO: M1 color composition

This looks much better Dirk

DvandenH wrote:
Ralph thx for your review,
Hereby a version that's a bit more normalized....the green is OIII
lines, the red the HAlpha line.
I am still trying to get the touch on color imaging with multiple layers
so pls if yoy have any tips post them.

Thx
Dirk


John N. Gretchen III
N5JNG NCS304
http://www.tisd.net/~jng3
 




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