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ASTRO: NGC7000
Portion of NGC7000 taken on 6 August 2010 from a farm just south of
Blueknob state park, PA. TOA150 at F/7.3. STL11000M, 4x10 min L, 1x10 min RGB(bin2x2). Cropped, no reduction. |
#2
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ASTRO: NGC7000
On 8/7/2010 7:43 PM, Robert Price wrote:
Portion of NGC7000 taken on 6 August 2010 from a farm just south of Blueknob state park, PA. TOA150 at F/7.3. STL11000M, 4x10 min L, 1x10 min RGB(bin2x2). Cropped, no reduction. Looks good, especially under your somewhat bright skies and being a pure LRGB. Why crop it? Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#3
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ASTRO: NGC7000
Looked like an interesting feature that does not show up well in
images that show the entire nebula, and I can not get the entire nebula at my FL. Robert On Sat, 07 Aug 2010 21:36:18 -0500, Rick Johnson wrote: On 8/7/2010 7:43 PM, Robert Price wrote: Portion of NGC7000 taken on 6 August 2010 from a farm just south of Blueknob state park, PA. TOA150 at F/7.3. STL11000M, 4x10 min L, 1x10 min RGB(bin2x2). Cropped, no reduction. Looks good, especially under your somewhat bright skies and being a pure LRGB. Why crop it? Rick |
#4
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ASTRO: NGC7000
Nice image Robert.
I always wonder what the "real" colour for Halpha nebulae is, I am getting quite a lot of variation in my images... Stefan "Robert Price" schrieb im Newsbeitrag ... Portion of NGC7000 taken on 6 August 2010 from a farm just south of Blueknob state park, PA. TOA150 at F/7.3. STL11000M, 4x10 min L, 1x10 min RGB(bin2x2). Cropped, no reduction. |
#5
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ASTRO: NGC7000
On Sat, 14 Aug 2010 12:50:44 +0200, "Stefan Lilge"
wrote: Nice image Robert. I always wonder what the "real" colour for Halpha nebulae is, I am getting quite a lot of variation in my images... Stefan Color being a perception, the closest thing to a "real" color probably is what you see through the eyepiece. Dalin Malin has made beautiful images: http://www.aao.gov.au/images/general/emission.html Something to shoot for. Bud |
#6
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ASTRO: NGC7000
On 8/14/2010 9:12 PM, William Hamblen wrote:
On Sat, 14 Aug 2010 12:50:44 +0200, "Stefan wrote: Nice image Robert. I always wonder what the "real" colour for Halpha nebulae is, I am getting quite a lot of variation in my images... Stefan Color being a perception, the closest thing to a "real" color probably is what you see through the eyepiece. Dalin Malin has made beautiful images: http://www.aao.gov.au/images/general/emission.html Something to shoot for. Bud That would be a black and white image as the eye rarely sees color through a telescope, even a very large one. The light is just too dim. Even when it does it is so weak it would be barely visible. Certainly that isn't what is being done with the images at the site you link to. If it were the Orion Nebula would be mostly a very weak teal color with some faintly blue highlights and a couple very small areas of weak pink to the east of the Trapezium. Yes the pictures at the link are pretty and colorful but certainly not even close to what the eye would see. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#7
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ASTRO: NGC7000
On Sun, 15 Aug 2010 01:15:33 -0500, Rick Johnson
wrote: On 8/14/2010 9:12 PM, William Hamblen wrote: On Sat, 14 Aug 2010 12:50:44 +0200, "Stefan wrote: Nice image Robert. I always wonder what the "real" colour for Halpha nebulae is, I am getting quite a lot of variation in my images... Stefan Color being a perception, the closest thing to a "real" color probably is what you see through the eyepiece. Dalin Malin has made beautiful images: http://www.aao.gov.au/images/general/emission.html Something to shoot for. Bud That would be a black and white image as the eye rarely sees color through a telescope, even a very large one. The light is just too dim. Even when it does it is so weak it would be barely visible. Certainly that isn't what is being done with the images at the site you link to. If it were the Orion Nebula would be mostly a very weak teal color with some faintly blue highlights and a couple very small areas of weak pink to the east of the Trapezium. Yes the pictures at the link are pretty and colorful but certainly not even close to what the eye would see. Rick I have to agree with Rick - During the years doing visual work the only colors I've observed through an eyepiece is gray and lite green (on really bright nebula). I've had people tell me they could see the reds and they probably did - my eyes just couldn't do it. I've also read that if you were able to travel to the nebula, you wouldn't know you were in a nebula, i.e., the dust/gass is too dispersed to be visible. I would be up for the trip if it could be done (8). |
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