Night OrionTest

OrionTest · **1 Like**

Aperture was one or two clicks off of f1.7
A test shot of Orion on the morning of Oct 6th. It was supposed to be cloudy and I had planned to bring my mount and telescope but didn't because of the forecast. I woke up early anyway and grabbed 20 minutes of data with my K3II to test the lens really.
Processed using SiriL, StareXterminator, Affinity Photo and LRcc

**angkymac** · 11-02-2021, 12:33 PM

Impressive!
Knowing next to nothing of astro-photography, I'm intrigued by the varied colors and the haze around each of them.
Or is the haze due to PP for the purpose of identifying the constellation's stars?
Thanks for posting the image.
Angky.

aitrus3 · 11-02-2021, 01:17 PM

some of the haze is caused by using StareXterminator to erase the stars so I could bring out as much nebulosity detail as I could. Because I stopped the lens down, the bright stars produced diffraction spikes and doing a starless version causes issues with those diffraction spikes. Some of the haze (like around Betelgeuse and Alnitak) is actual nebula that surrounds the star. Mainly though it's from creating a starless version. This region is heavy on the stars and when you try to bring out the nebulae, they dominate the scene. Doing a starless version means you can stretch the nebulae so it is visible but not bring out so many stars. This was my first attempt at doing a starless edit.

**MikeNArk** · 11-02-2021, 03:30 PM

Thanks for explaining the processing that you applied to the images. I like the outcome. You indicated that you collected about twenty minutes of data. How many exposes did you use? Thanks for posting.

aitrus3 · 11-02-2021, 03:38 PM

Originally posted by MikeNArk

Thanks for explaining the processing that you applied to the images. I like the outcome. You indicated that you collected about twenty minutes of data. How many exposes did you use? Thanks for posting.

my memory fails me on the combination i did. 20-1 minute exposures? don't remember but something like that.

**angkymac** · 11-02-2021, 07:39 PM - **1 Like**

Originally posted by aitrus3

some of the haze is caused by using StareXterminator to erase the stars so I could bring out as much nebulosity detail as I could. Because I stopped the lens down, the bright stars produced diffraction spikes and doing a starless version causes issues with those diffraction spikes. Some of the haze (like around Betelgeuse and Alnitak) is actual nebula that surrounds the star. Mainly though it's from creating a starless version. This region is heavy on the stars and when you try to bring out the nebulae, they dominate the scene. Doing a starless version means you can stretch the nebulae so it is visible but not bring out so many stars. This was my first attempt at doing a starless edit.

Thanks for taking the time to explain all this!
Completely new info for me.
Angky.

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11-02-2021, 12:33 PM	#2
angkymac Loyal Site Supporter Join Date: Nov 2019 Photos: Albums Posts: 8,981	Impressive! Knowing next to nothing of astro-photography, I'm intrigued by the varied colors and the haze around each of them. Or is the haze due to PP for the purpose of identifying the constellation's stars? Thanks for posting the image. Angky.

11-02-2021, 01:17 PM	#3
aitrus3 Pentaxian Join Date: Mar 2010 Location: Kamloops B.C. Photos: Gallery \| Albums Posts: 1,432 Original Poster	some of the haze is caused by using StareXterminator to erase the stars so I could bring out as much nebulosity detail as I could. Because I stopped the lens down, the bright stars produced diffraction spikes and doing a starless version causes issues with those diffraction spikes. Some of the haze (like around Betelgeuse and Alnitak) is actual nebula that surrounds the star. Mainly though it's from creating a starless version. This region is heavy on the stars and when you try to bring out the nebulae, they dominate the scene. Doing a starless version means you can stretch the nebulae so it is visible but not bring out so many stars. This was my first attempt at doing a starless edit.

11-02-2021, 03:30 PM	#4
MikeNArk Loyal Site Supporter Join Date: Sep 2019 Location: Conway, Arkansas Posts: 15,209	Thanks for explaining the processing that you applied to the images. I like the outcome. You indicated that you collected about twenty minutes of data. How many exposes did you use? Thanks for posting.

11-02-2021, 03:38 PM	#5
aitrus3 Pentaxian Join Date: Mar 2010 Location: Kamloops B.C. Photos: Gallery \| Albums Posts: 1,432 Original Poster	Originally posted by MikeNArk Thanks for explaining the processing that you applied to the images. I like the outcome. You indicated that you collected about twenty minutes of data. How many exposes did you use? Thanks for posting. my memory fails me on the combination i did. 20-1 minute exposures? don't remember but something like that.

11-02-2021, 07:39 PM - 1 Like	#6
angkymac Loyal Site Supporter Join Date: Nov 2019 Photos: Albums Posts: 8,981	Originally posted by aitrus3 some of the haze is caused by using StareXterminator to erase the stars so I could bring out as much nebulosity detail as I could. Because I stopped the lens down, the bright stars produced diffraction spikes and doing a starless version causes issues with those diffraction spikes. Some of the haze (like around Betelgeuse and Alnitak) is actual nebula that surrounds the star. Mainly though it's from creating a starless version. This region is heavy on the stars and when you try to bring out the nebulae, they dominate the scene. Doing a starless version means you can stretch the nebulae so it is visible but not bring out so many stars. This was my first attempt at doing a starless edit. Thanks for taking the time to explain all this! Completely new info for me. Angky.