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NGC 7000, in Cygnus
February 4, 2015 at 6:44 pm
Here is an image of NGC 7000, in Cygnus that I took on October 20, 2014 at Kurz Wildlife Management Area in Pike County Georgia. NGC 7000 is also known as the North American Nebula. This image shows what is known as The Cygnus Wall, which is composed of the "Central American" portion of the North American Nebula. It is the area of the nebula with the most intense star formation. This image is a stack of 27 5-minute exposures (135 minutes total) at ISO 800. Enjoy:
![[Image: a_a_a_cygnus_wall_new.jpg]](https://images.weserv.nl/?url=i1012.photobucket.com%2Falbums%2Faf250%2Forogenicman%2Fa_a_a_cygnus_wall_new.jpg)
'The difference between a Miracle and a Fact is exactly the difference between a mermaid and seal. It could not be expressed better.'
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"I think that in the discussion of natural problems we ought to begin not with the scriptures, but with experiments, demonstrations, and observations".
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RE: NGC 7000, in Cygnus
February 4, 2015 at 7:04 pm
What's the field of view?
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RE: NGC 7000, in Cygnus
February 4, 2015 at 7:28 pm
The field of view is 51 x 76 minutes of arc. The scope is an 8 inch f5 corrected newtonian. The image was taken at the focal plane of the scope. The image was slightly cropped to get rid of the overlap on the edges due to stacking.
'The difference between a Miracle and a Fact is exactly the difference between a mermaid and seal. It could not be expressed better.'
-- Samuel "Mark Twain" Clemens
"I think that in the discussion of natural problems we ought to begin not with the scriptures, but with experiments, demonstrations, and observations".
- Galileo Galilei (1564-1642)
"In short, Meyer has shown that his first disastrous book was not a fluke: he is capable of going into any field in which he has no training or research experience and botching it just as badly as he did molecular biology. As I've written before, if you are a complete amateur and don't understand a subject, don't demonstrate the Dunning-Kruger effect by writing a book about it and proving your ignorance to everyone else! "
- Dr. Donald Prothero
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RE: NGC 7000, in Cygnus
February 4, 2015 at 8:02 pm
As George Carlin noted, the 'real' God is too busy lobbing gas balls around the firmament to ever give a fuck about us.
Love the picture and appreciate the skill in securing the images and stacking them.
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RE: NGC 7000, in Cygnus
February 4, 2015 at 8:05 pm
(February 4, 2015 at 8:02 pm)vorlon13 Wrote: Love the picture and appreciate the skill in securing the images and stacking them.
This. It qualifies as Science Porn, and will be quoted as such.
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RE: NGC 7000, in Cygnus
February 4, 2015 at 8:08 pm
Thanks, folks.
'The difference between a Miracle and a Fact is exactly the difference between a mermaid and seal. It could not be expressed better.'
-- Samuel "Mark Twain" Clemens
"I think that in the discussion of natural problems we ought to begin not with the scriptures, but with experiments, demonstrations, and observations".
- Galileo Galilei (1564-1642)
"In short, Meyer has shown that his first disastrous book was not a fluke: he is capable of going into any field in which he has no training or research experience and botching it just as badly as he did molecular biology. As I've written before, if you are a complete amateur and don't understand a subject, don't demonstrate the Dunning-Kruger effect by writing a book about it and proving your ignorance to everyone else! "
- Dr. Donald Prothero
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RE: NGC 7000, in Cygnus
February 4, 2015 at 8:12 pm
Nice work. That's one of my favorite areas of sky, and you really captured the contrast very nicely.
I know many refractor guys look down on Newtonians, but I actually think the diffraction spikes in photos taken through newts look cool. :p
The correction looks pretty good, the off-axis abberations are less significant than what I'd expect from an f/5 primary. What are you using to correct off-axis coma? (I had a 12" f/4.5 and the coma would be very noticeable in that scope.)
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RE: NGC 7000, in Cygnus
February 5, 2015 at 1:04 am
Niiiice.
I really want to get into a bit of astrophotography when things have settled down a little. Can I ask what camera/sensor was used?
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RE: NGC 7000, in Cygnus
February 5, 2015 at 1:41 am
(This post was last modified: February 5, 2015 at 1:44 am by orogenicman.)
(February 4, 2015 at 8:12 pm)Cthulhu Dreaming Wrote: Nice work. That's one of my favorite areas of sky, and you really captured the contrast very nicely.
I know many refractor guys look down on Newtonians, but I actually think the diffraction spikes in photos taken through newts look cool. :p
The correction looks pretty good, the off-axis abberations are less significant than what I'd expect from an f/5 primary. What are you using to correct off-axis coma? (I had a 12" f/4.5 and the coma would be very noticeable in that scope.)
I am using a Baader MPCC coma corrector in front of the camera. It can be used for photography or for visual use with the proper adapters. It makes a big difference as it acheives a flat field for both uses. With a small focal ratio on a Newtonian, collimation of the mirrors is critical. I collimate my scope before each session and make sure the scope has cooled down to ambient temperature prior to use.
Thanks, Alex. I used a Hutech-modified Canon T1i. It has a clear filter on the sensor instead of the manufacturer's infrared cut filter. That gives the camera full spectrum capabilities. Then I use a Baader UV/IR cut filter that allows hydrogen alpha spectrum (the reddish color you see in the image) to pass through but cuts the infrared and uv dispersed in the atmosphere.
'The difference between a Miracle and a Fact is exactly the difference between a mermaid and seal. It could not be expressed better.'
-- Samuel "Mark Twain" Clemens
"I think that in the discussion of natural problems we ought to begin not with the scriptures, but with experiments, demonstrations, and observations".
- Galileo Galilei (1564-1642)
"In short, Meyer has shown that his first disastrous book was not a fluke: he is capable of going into any field in which he has no training or research experience and botching it just as badly as he did molecular biology. As I've written before, if you are a complete amateur and don't understand a subject, don't demonstrate the Dunning-Kruger effect by writing a book about it and proving your ignorance to everyone else! "
- Dr. Donald Prothero
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RE: NGC 7000, in Cygnus
February 5, 2015 at 1:45 am
Yep, I always have gone through the same process even for purely visual use - collimate and cool. Pretty much always had to transport my Newtonian before using, so it was pretty mandatory. My Schmidt-Cassegrain is a bit more forgiving.
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