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Old 18-01-2021, 01:00 PM
PaulSthcoast (Paul)
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Horse-head and Flame nebuleas

Hi everyone,

I would like to present my images of the Horsehead and Flame nebuleas.

Subs were taken on 16.01.21.

Details as follows:

35 x 60 seconds @ ISO 6400
Canon 1100D Modded
IDAS LPS2 filter
Sywatcher 80/400mm refractor
Skywatcher Star Adventure


Images taken via Astrophotography Tools
Stacked in Deep Sky Stacker and processed in Photoshop.

Thanks for looking, comments welcomed.

PS, same image, different processing.

Slight crop to to allow file upload.


Paul.
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Click for full-size image (HHnF2 IIS (2).jpg)
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Last edited by PaulSthcoast; 18-01-2021 at 10:33 PM.
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  #2  
Old 18-01-2021, 02:23 PM
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aiming for 2nd Halley's

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Lots of detail showing through. Biggest problem is saturation of brighter stars which is blowing them up a bit. Not sure if that is processing or you've hit the dynamic range at 60seconds in your subs. You could try some shorter subs and HDR blend in photoshop or similar
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Old 18-01-2021, 03:48 PM
Startrek (Martin)
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Paul,
That’s a great first image !!
Well done !!
Keep imaging every clear night you can and through experience and advice from IIS you will achieve even better results in the future
Martin
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Old 18-01-2021, 05:20 PM
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PKay (Peter)
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Your gettin there mate!

Pretty good.
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Old 19-01-2021, 04:03 PM
PaulSthcoast (Paul)
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Thanks guys for your comments.

Robert, I'm not sure about the bloating.
I was reading your post re halos with filters.
I used an IDAS LPS2, and it was fitted on the
front of the DSLR nose piece.
Perhaps this may be a similar issue ?

Martin, Im forever learning !
And get out every opportunity I have,
as I'm sure you know ?

Peter. A man of few words.
Thanks for the compliment !

I have a real interest in nebula,
so I am looking forward to posting
more images soon.

Paul.
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Old 20-01-2021, 07:47 PM
PaulSthcoast (Paul)
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Image revisited

After a little more processing,
I thought I would re post the image.

Thanks again for looking.

Paul.
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Old 21-01-2021, 10:39 AM
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Sunfish (Ray)
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Still a good image. Was that a little fringing adjustment ?. Does a modified camera benefit from an IR UV filter?
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Old 21-01-2021, 11:47 AM
PaulSthcoast (Paul)
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Good question Ray,

Thats something I hope to experiment
with next opportunity.

I'm thinking it may help with the bloating.

I have already discovered that having the
filter closer to the sensor gives better results.

I'm hoping to try a UV filter, a Ha filter,
or a combination of both to test the results.

Thanks for the compliment.

Paul.
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  #9  
Old 21-01-2021, 12:15 PM
evltoy (Wayne)
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Nice image Paul... well done

I tried to hit this target last night, but it seems after stacking 90 subs at 40sec I cant pick up any Nebuleas!

Should it be as easy to see like M42? With M42 I can do a 30sec exposure and see the Nebulea on my DSLR review screen clear as day for framing.

And advice would help

Cheers
Wayne

Celestron Evo8
Home made EQ wedge
ZWO 60280 Guide/Finder Scope
ZWO ASI462 - Planets/Guiding
Nikon D80 DSLR - DSO

Last edited by evltoy; 21-01-2021 at 12:19 PM. Reason: Add equipment
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Old 21-01-2021, 10:50 PM
raymo
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A 30sec sub will show the flame neb adjacent to Alnitak,although nothing like as bright as M42, using at least ISO 1600 with a DSLR. The horse head will require a little longer to become obvious.
raymo
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Old 21-01-2021, 11:29 PM
Startrek (Martin)
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Quote:
Originally Posted by evltoy View Post
Nice image Paul... well done

I tried to hit this target last night, but it seems after stacking 90 subs at 40sec I cant pick up any Nebuleas!

Should it be as easy to see like M42? With M42 I can do a 30sec exposure and see the Nebulea on my DSLR review screen clear as day for framing.

And advice would help

Cheers
Wayne

Celestron Evo8
Home made EQ wedge
ZWO 60280 Guide/Finder Scope
ZWO ASI462 - Planets/Guiding
Nikon D80 DSLR - DSO
Wayne
M42 has an apparent magnitude of 4 ( very bright )
Rosette Nebula is magnitude 9 ( very dim )
The moon is up at moment which doesn’t help, unless your imaging in the wee hours, so you have moon glare to contend with unless you have a narrowband filter for your DSLR
40 sec subs on a DSLR will struggle to provide enough dynamic range to expose any decent amount of nebulosity
Try 90 sec or 120 sec subs as a minimum, the trouble is once you start increasing sub lengths on a DSLR you introduce a lot of noise too. So lots of subs, dithering and darks will help reduce the noise floor.
I’ve never been successful imaging the Rosette with my Canon 600D but with a cooled OSC camera like my 2600MC , no issue at all
Martin
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