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.

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

"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

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

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.

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

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

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

Thx John!

--
Dirk van den Herik


"John N. Gretchen III" wrote in message
m...
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

DvandenH


Dirk:

I realize that you are probably working on the next images by this time,
however, I did want to add some comments.

The files that you posted for M1 all have the same name. To avoid
overwriting of previous files may I suggest that you rename the files
with unique names and place them in a new work folder. Do that in My
Computer. Some file naming convention may be useful. Other
photographers may have suggestions on that. When I have duplications of
filenames of different files that are in different folders, I tack on a
number, e.g., filename-011408-1.tif , for example. That says the base
filename, date and item number. Use FileSave As to rename files that
have been modified, and if you haven't saved the file the original will
be unmodified and the modified file will have the new name. You probably
know all that, and I hope that I haven't said too much.

Of the three images of M1 I thought that the first one, [herein called]
M1-A, was really great. After zooming in on stars and stuff at the pixel
level I noticed that the image pixels were grouped in an 8-pixel x
8-pixel grid pattern. The next two images, say, M1-B, and, M1-C, did not
have that effect.

Image M1-B had the extra bluish light.

Image M1-C has the enhanced brightness light for what seems more than
one filter. There is nearly the same high definition as M1-A, and there
is an overall great dramatic quality. Zooming in to the pixel level I
see that the image has no grid pattern that was found in M1-A. I find
that the stars are extra bright, and possibly 3 times the visible area.
Zooming in to see the individual stars I see that there is a bluish
fringe at the top left of each star disk and a smaller greenish fringe
at the lower right of each disk. That suggests to me that the images are
not coincident in the image modification program. If the same images or
layers were shifted to be coincident the extra brightness of the stars
may be less while keeping the same high focus quality. I say that based
only with my Photoshop imaging and MicroStation CAD image rendering
experience, and I have no knowledge of maxim or CS3.

I see that the edges of the three images are not cropped exactly the
same. When I display each image using IrfanView and switch from image to
image the images display at the same magnification on screen are
slightly not aligned. I don't say that is a problem.

The green and red material lights in the images are also really great.

You images cause a lot of wonder.

Ralph Hertle