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  1. Galleries
  2. »
  3. Astrophotography
  4. » M42 from Area 21

 
M42 from Area 21...

Astrografia

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M42 from Area 21 sent on November 04, 2013 (12:42) by Fabercom. 19 comments, 1645 views.

Posa B ISO 1600, tripod.

Sono arrivato sul punto d'osservazione con una visibilità di 10 metri causa nebbia intensissima ma dopo circa 2 ore, il cielo si è pulito. Purtroppo essendo ancora novellino, mi mancavano le fasce anticondensa, il filtro antiinquinamento e il riduttore spianatorte. Poche pose perché la nebbia non ha tardato a farsi viva e nessun flat perché non ho la flatbox. Credo comunque che il risultato sia discreto. M42 con 550D modificata con filtro Baader + rifrattore Tecnosky 115-800 f/6.9 (senza riduttore/spianatore) Montatura: Eq6 Pro Guida con cercatore Celestron 9x50 + Lacerta Mgen 2 stand alone 8 pose a 1600 iso da 240" + dark + offset (no flat) 3 pose a 1600 iso da 60" per il nucleo + dark + offset (no flat) Umidità 93% - Temperatura 13° circa Elaborazione: Deepskystacker + Photoshop Cs6 64bit Ho virato leggermente i colori sul rosso perché la trovo più gradevole.





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avatarsenior
sent on November 04, 2013 (13:44) | This comment has been automatically translated (show/hide original)

I would say very good result

avataradmin
sent on November 04, 2013 (14:23) | This comment has been automatically translated (show/hide original)

I'm not an expert in astrophotography, however, the result seems really good!

avatarjunior
sent on November 04, 2013 (14:43) | This comment has been automatically translated (show/hide original)

that honor ... :-|

avatarjunior
sent on November 04, 2013 (23:52) | This comment has been automatically translated (show/hide original)

Extraordinary ...! Congratulations.

avatarjunior
sent on November 05, 2013 (0:33) | This comment has been automatically translated (show/hide original)

Thanks Lucio.

avatarsenior
sent on November 05, 2013 (7:55) | This comment has been automatically translated (show/hide original)

Bravissimo, maybe a few more laying on the nucleus of M42 would have helped ;-) halos of stars are likely caused dall'eccesiva humidity, the same one that causes this slight haze over all the pictures ... Unfortunately, this period is adverse meteorological in all senses for everyone! Greetings, Beppe

user15434
avatar
sent on November 05, 2013 (9:06) | This comment has been automatically translated (show/hide original)

Hello Fabercom,
compliments for the enterprise and for the final result. Only advice is in processing. I think there's been a problem in (I guess) superposition of the nucleus of M42 to the rest of the nebulosity. In fact, if you look at this image the central region is different.





Hoping that you have not moved the nebula:-D ...
A greeting and the proxima,
David

avatarjunior
sent on November 05, 2013 (11:17) | This comment has been automatically translated (show/hide original)

David, you're very careful. I messed up on the core. In practice I could do well to merge the two exposures in Photoshop and is coming off a crap.
Let's say it was a good attempt.
If I can in the next few days will make a nice little 'poses and see the result.

user15434
avatar
sent on November 05, 2013 (11:22) | This comment has been automatically translated (show/hide original)

... the by, expect a fantastic result, all the conditions are there!
Best wishes,
David

avatarsenior
sent on November 05, 2013 (11:54) | This comment has been automatically translated (show/hide original)

Sorry but I also would like to understand (I'm trying to learn) because sooner or later happen to me to try my hand with the Nebula of Orion :-| ... the definition of the core is just a matter of melting? I see on my monitor (laptop: fconfuso :) also a canopy of stars with a little "inflated" which made me assume that it was up by the turbulence and the high relative humidity rate as good Fabercom points out ... But you wow, what an eye you David! from what you noticed it was a problem of image fusion? wow wow! these things are too intriguing for me! :-D

Excuse me a stupid question Fabercom, from neophyte who are: rimetterti before doing other photos, it would not be better to try to redo the merger and post-production with shooting you already have? perhaps using a specific program for astrofotografia rather than using PS? it's just what I think .... Hello!

user15434
avatar
sent on November 05, 2013 (13:40) | This comment has been automatically translated (show/hide original)

Hello Beppe,
the problem of fusion I've only seen thanks to my past "visualist". Anyone who has observed carefully M42 to the telescope will find that the most beautiful part of the nebula is the "croissant" dark overlooking the bright central region in which there is the famous trapeze. It 'just that "croissant" to have a bad image of Fabercom.
In the picture below I moved the central region in the correct position (right). Obviously I had to "invent" the regions of the nebula lost during the melting phase.





Greetings to all and proxima,
David

avatarsenior
sent on November 05, 2013 (15:58) | This comment has been automatically translated (show/hide original)

Super! Thanks David! I'll send you a PM ;-)

avatarjunior
sent on November 05, 2013 (17:23) | This comment has been automatically translated (show/hide original)

David saw that we ask you, "with that program should make the merger?"

avatarsupporter
sent on November 07, 2013 (22:47) | This comment has been automatically translated (show/hide original)

Incredible, there is little to say! I'm not an expert in astrophotography, but this really leaves you speechless!

Leonardo

user15434
avatar
sent on November 08, 2013 (11:47) | This comment has been automatically translated (show/hide original)

Hello Fabercom,
can be used (at least) two techniques. Once one has taken (or elaborate ... the RAW files allow us to use a dynamic rather high) M42 in order to have a shot for the diffuse nebulosity and one for the center and aligned the various frame you can:
- Give them a meal in the HDR software such as Photomatix, Photoshop, or specific programs for Astrophotography
- Merging of frames manually using Photoshop ([URL =] www.astropix.com/HTML/J_DIGIT/LAYMASK.HTM )
Greetings and see you soon,
David

avatarsenior
sent on November 08, 2013 (13:33) | This comment has been automatically translated (show/hide original)

Very good result, but as you have written there you're ready to work on to improve a lot, both during processing, especially that of recovery.
For this you should lengthen the shutter speed and limit yourself to 10 min at 800 ISO.

Keep it that you are doing well!

avatarsenior
sent on November 08, 2013 (21:27) | This comment has been automatically translated (show/hide original)

Here you see a little 'better than on FB! Aside from the inconvenience of the Trapezium moved, I can confirm here that the photo I like. To merge different exposures can use Photoshop in the same way you do the double exposures of photos "normal", creating one or more layers and then working with patience (molta!) to select the portions to be visible. Previously make 50% transparent overlay level and align (manually and with the photo very zooming) on ??the stars underneath it, so you do not have displacement effects that you've had in this case. Then return to the 100% level, you hide it and make emerge the part that you are interested in brushing with white brush, setting a better transparency of 15-20% in order to act a bit 'at a time and selecting an appropriate brush size . If you feel that you made a mistake and put the black brush "gates" error.I usually preferico this manual method that does not use automatic HDR software, there should be more patience, but there is more control over what you do.

Regarding the acquisition quoto the advice of Lorenzo longer exposures and lower ISO. I, too, at the beginning I did not have the courage to push beyond the 30/60 s, when I tried it I realized it was another world!

hello!

Chiara

avatarjunior
sent on November 09, 2013 (19:05) | This comment has been automatically translated (show/hide original)

first of all thank you all for the comments, for me it is an honor to receive your advice.
Until now, with the EQ6 I drove up to 10 minutes without any problems, I did not dare to go further. Let's see what happens.
I have still much to learn, especially for processing.
Many advised me to let it go and move on to DeepSkyStacker iris or otherwise.

Thank you again.

avatarjunior
sent on December 02, 2013 (23:52) | This comment has been automatically translated (show/hide original)

despite various problems remains a great job!


RCE Foto

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