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Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing

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neptun2
scholastic sledgehammer


Reged: 03/04/07

Loc: Bulgaria
First light on horsehead nebula with SW 120 ED new
      #5663215 - 02/05/13 09:59 AM

Hello guys. Yesterday i finally managed to sort the problems with my new setup and take 10 5min exposures at ISO 1600 of the horsehead nebula and flame. I used nikon d90 modified dslr and skywatcher 120 ED refractor on heq5 pro mount and with off-axis guider and meade dsi 2 pro as gudie camera. Here is the result:



It is far from perfect but the first time when autoguiding works ok with the new scope so i am relatively happy with it.


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fishonkevinModerator
Carpal Tunnel
*****

Reged: 04/29/07

Loc: Michigan
Re: First light on horsehead nebula with SW 120 ED new [Re: neptun2]
      #5663564 - 02/05/13 01:06 PM

Looks like you got things going pretty good.

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srosenfraz
Post Laureate
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Reged: 03/06/11

Loc: United States
Re: First light on horsehead nebula with SW 120 ED new [Re: fishonkevin]
      #5663963 - 02/05/13 05:09 PM

Nice job on this - congrats on the new scope!

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neptun2
scholastic sledgehammer


Reged: 03/04/07

Loc: Bulgaria
Re: First light on horsehead nebula with SW 120 ED new [Re: srosenfraz]
      #5664650 - 02/06/13 04:26 AM

Thank you. I have a lot to learn about processing yet but it encouraging first light with the new scope.

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Skyshooter
professor emeritus


Reged: 04/07/08

Loc: S. Utah, U.S.A.
Re: First light on horsehead nebula with SW 120 ED new [Re: neptun2]
      #5664792 - 02/06/13 08:26 AM

Beautifully composed and framed. Ain't it great when things just work? Way to go...

Cheers,
Ed


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mmalik
Post Laureate
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Reged: 01/13/12

Loc: USA
Re: First light on horsehead nebula with SW 120 ED new [Re: neptun2]
      #5664841 - 02/06/13 09:12 AM

Dim looking first light, but good attempt after all.

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jwheel
professor emeritus


Reged: 01/23/08

Loc: Fort Davis TX
Re: First light on horsehead nebula with SW 120 ED new [Re: mmalik]
      #5664898 - 02/06/13 10:00 AM

Nice shot!

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neptun2
scholastic sledgehammer


Reged: 03/04/07

Loc: Bulgaria
Re: First light on horsehead nebula with SW 120 ED new [Re: jwheel]
      #5664972 - 02/06/13 10:54 AM

I could pull out more detail from the raw data but unfortunately the noise becomes too high. If i could capture 10 more frames for example this would allow me to stretch the details further.

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neptun2
scholastic sledgehammer


Reged: 03/04/07

Loc: Bulgaria
Re: First light on horsehead nebula with SW 120 ED new [Re: neptun2]
      #5665493 - 02/06/13 03:20 PM

Thank you for good words and suggestions. Here is another version with better sharpness , contrast and detail but also with higher noise visible.



Edited by neptun2 (02/06/13 03:23 PM)


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neptun2
scholastic sledgehammer


Reged: 03/04/07

Loc: Bulgaria
Re: First light on horsehead nebula with SW 120 ED new [Re: neptun2]
      #5706958 - 03/01/13 10:39 AM

I tried the LLRGB method and here is what i got:



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Nils_Lars
Postmaster
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Reged: 01/04/08

Loc: Santa Cruz Mountains , CA
Re: First light on horsehead nebula with SW 120 ED [Re: neptun2]
      #5708105 - 03/02/13 02:04 AM

A successful first light id say , the reprocess worked well also.

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srosenfraz
Post Laureate
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Reged: 03/06/11

Loc: United States
Re: First light on horsehead nebula with SW 120 ED new [Re: Nils_Lars]
      #5709271 - 03/02/13 06:09 PM

Your reprocess pulled out a lot of the fainter parts - nice job. One of the things that I can see with the reprocess is that the image appears to have some degree of vignetting (its not as obvious in the darker first version). Are you using flats with your calibration?

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neptun2
scholastic sledgehammer


Reged: 03/04/07

Loc: Bulgaria
Re: First light on horsehead nebula with SW 120 ED new [Re: srosenfraz]
      #5711014 - 03/03/13 05:06 PM

Yes there is vignetting. Unfortunately i did not take flats so i can't correct it properly. Maybe i had the prism of the off-axis guider too inwards and this caused vignetting in one of the corners. I am also waiting for one t-thread spacer to make the distance between flattener and sensor correct. Maybe this also causes vignetting.

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srosenfraz
Post Laureate
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Reged: 03/06/11

Loc: United States
Re: First light on horsehead nebula with SW 120 ED new [Re: neptun2]
      #5711861 - 03/04/13 01:41 AM

Irrespective of what's the cause of the vignetting, my suggestion would be that you should always take flats. They'll go a long way towards compensating for any vignetting, even if its just minor vignetting. I think its just good practice, and its never going to hurt your images to take flats.

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neptun2
scholastic sledgehammer


Reged: 03/04/07

Loc: Bulgaria
Re: First light on horsehead nebula with SW 120 ED new [Re: srosenfraz]
      #5711888 - 03/04/13 02:38 AM

Well i will definitely consider that next time. I have never taken flats - only darks but will maybe reconsider that.

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