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#1
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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. |
#2
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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 |
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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
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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
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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. |
#6
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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 |
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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 |
#8
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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 |
#9
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ASTRO: M1 color composition
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 |
#10
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ASTRO: M1 color composition
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 |
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