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Orion's Belt

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#1 wb6pco

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Posted 24 November 2022 - 01:25 PM

A little bit of everything in this image; H-a, blue reflection nebulosity and brown dust. 285 minutes total exposure time with the 400mm-f/2.8 lens 

 

http://astrophotogra...belt-400mm.html

 

Thanks for looking!

 

Chuck


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#2 deepwoods1

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Posted 24 November 2022 - 01:29 PM

That's beautiful!!!!



#3 Tkall

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Posted 24 November 2022 - 02:04 PM

Wow!



#4 petert913

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Posted 24 November 2022 - 02:05 PM

Oh my gosh !  So many things I've never seen before in this region.  Well done.



#5 Dean J.

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Posted 24 November 2022 - 02:14 PM

A little bit of everything in this image; H-a, blue reflection nebulosity and brown dust. 285 minutes total exposure time with the 400mm-f/2.8 lens 

 

http://astrophotogra...belt-400mm.html

 

Thanks for looking!

 

Chuck

Wow!



#6 gstrumol

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Posted 24 November 2022 - 03:05 PM

Amazing!!

 

Sorry if this is a stupid question, but what causes those multiple cases of a bright 'star' with two triangular cones shooting out in opposite direction?



#7 BucketDave

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Posted 24 November 2022 - 03:14 PM

What an interesting area, good find and well imaged!

I was going to suggest you might have some pinched optics, judging by the star diffraction but i'm confused as to why the brightest stars don't have the 'nibble' at the same angle.
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#8 Dean J.

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Posted 24 November 2022 - 03:31 PM

What an interesting area, good find and well imaged!

I was going to suggest you might have some pinched optics, judging by the star diffraction but i'm confused as to why the brightest stars don't have the 'nibble' at the same angle.

I just assumed that it was a characteristic of the Canon lens he is using.  But it is interesting that the angle of the pattern varies.



#9 wb6pco

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Posted 24 November 2022 - 03:44 PM

Amazing!!

 

Sorry if this is a stupid question, but what causes those multiple cases of a bright 'star' with two triangular cones shooting out in opposite direction?

 

What an interesting area, good find and well imaged!

I was going to suggest you might have some pinched optics, judging by the star diffraction but i'm confused as to why the brightest stars don't have the 'nibble' at the same angle.

All the fast large Canon telephotos do this. I've tried the 300-f/2.8, 400-f/2.8 and the 500-f4 and the bright stars all look the same with the effect rotating around the center. I don't know what cause this.


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#10 Birddogoby

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Posted 24 November 2022 - 04:36 PM

Stunning!

#11 mikewayne3

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Posted 24 November 2022 - 06:31 PM

bow.gif bow.gif bow.gif bow.gif



#12 Greg M

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Posted 24 November 2022 - 06:58 PM

I believe there are a couple of clips holding one of the lens elements that causes the strange diffraction spikes. Never noticed with regular daytime images. Stopping down just one stop would eliminate them though will require a bit more exposure time to equal out the exposure.



#13 Dean J.

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Posted 24 November 2022 - 07:16 PM

All the fast large Canon telephotos do this. I've tried the 300-f/2.8, 400-f/2.8 and the 500-f4 and the bright stars all look the same with the effect rotating around the center. I don't know what cause this.

Chuck, do you have a picture of how you are attaching the Canon lenses to your mount?  I think I see a Canon lens there in the picture your are using for your profile.  It looks like you have it attached to a Losmandy dovetail plate but i can't really see how you are doing it.  I checked your web site too and can't find anything showing your Canon lens rig.



#14 wb6pco

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Posted 24 November 2022 - 08:35 PM

Chuck, do you have a picture of how you are attaching the Canon lenses to your mount?  I think I see a Canon lens there in the picture your are using for your profile.  It looks like you have it attached to a Losmandy dovetail plate but i can't really see how you are doing it.  I checked your web site too and can't find anything showing your Canon lens rig.

I'll get you a picture tomorrow and post it on this thread.


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#15 Daveone

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Posted 25 November 2022 - 03:13 AM

Beautiful picture again...pity about that bright stars artifact (I suggest you shall use some clonestamp in this case wink.gif ) but anyway just gorgeous and cool image bow.gif waytogo.gif


Edited by Daveone, 25 November 2022 - 03:15 AM.


#16 Craigar

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Posted 25 November 2022 - 07:28 AM

Incredible! takes my breath away - and those two poofy looking "cotton balls" ! WoW !  makes me almost want to call Mr. Jetson and ask him if could give me even more of a close up tour...shocked.gifsmile.gif

 

I love the Orion constellation - and I've only tried to really get M42 so far, and had ONE night of good seeing in the last month and got on my horse and drove into "Topanga Canyon" bortle 6 and got IMHO my best Great Orion nebula shot so far.. I had NO IDEA there was so much in his belt !!!

 

M42 ES 6" Mak Newt Ds10c Hcg25 2s 11min34s AND C8 63reducer Ds10c 4sec20 HCG 2x2.221025 DSS 15min20sec GIMP 1600x1200 2202-11-17

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#17 wb6pco

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Posted 25 November 2022 - 10:12 AM

lens_mounting.jpg

Chuck, do you have a picture of how you are attaching the Canon lenses to your mount?  I think I see a Canon lens there in the picture your are using for your profile.  It looks like you have it attached to a Losmandy dovetail plate but i can't really see how you are doing it.  I checked your web site too and can't find anything showing your Canon lens rig.

The lens is attached to the dovetail plate with one 1/4-20 screw at the location of the tripod mount. The camera is attached to the dovetail plate using a custom spacer and another 1/4-20 screw. It's a very solid setup and I've not detected any flexure between the lens and guidescope (hidden behind the lens in this picture).

 

Chuck

 

 


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#18 rgk901

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Posted 25 November 2022 - 10:17 AM

great pic and refreshing actually not to see the usual m42 framing...those puffy ghost clouds are great

don't worry about the artifact... Photoshop it out, print it and hang it!

Edited by rgk901, 25 November 2022 - 10:18 AM.


#19 wb6pco

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Posted 25 November 2022 - 10:20 AM

Thank-you all for the many nice comments. I'll take another look at the notches in the brightest stars to see if I can figure out a way to improve them.

 

It's not something I'm really concerned about but maybe I can make them better. The lens is not a perfect imaging instrument. At this stage of my astroimaging career its positives outweigh its negatives.

 

Chuck



#20 whwang

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Posted 25 November 2022 - 11:31 AM

Hi Chuck,

 

That's a very beautiful shot.  Deep, and well processed.

 

Cheers,

Wei-Hao



#21 wb6pco

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Posted 25 November 2022 - 11:31 AM

Beautiful picture again...pity about that bright stars artifact (I suggest you shall use some clonestamp in this case wink.gif ) but anyway just gorgeous and cool image bow.gif waytogo.gif

I improved Alnitak and Mintaka. Still not perfect but it should look better. I did not touch the medium bright star so they still have notches. Let me know what you think.

 

http://astrophotogra...belt-400mm.html

 

I developed a new procedure. I can describe it if anyone wants to know.

 

Chuck


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#22 wb6pco

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Posted 25 November 2022 - 11:32 AM

Hi Chuck,

 

That's a very beautiful shot.  Deep, and well processed.

 

Cheers,

Wei-Hao

Thanks Wei-Hao!



#23 RamStrocsop

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Posted 25 November 2022 - 12:35 PM

waytogo.gif waytogo.gif waytogo.gif Great shot!!!



#24 Dean J.

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Posted 25 November 2022 - 01:22 PM

attachicon.giflens_mounting.jpg

The lens is attached to the dovetail plate with one 1/4-20 screw at the location of the tripod mount. The camera is attached to the dovetail plate using a custom spacer and another 1/4-20 screw. It's a very solid setup and I've not detected any flexure between the lens and guidescope (hidden behind the lens in this picture).

 

Chuck

Ok, excellent.  I see how you are doing it, and the two hose clamps are part of a custom focus adjustment setup you made.  Thanks for the picture.



#25 Dean J.

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Posted 25 November 2022 - 01:24 PM

 

 

I developed a new procedure. I can describe it if anyone wants to know.

 

Chuck

Yes.




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