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  1. Galleries
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  3. Astrophotography
  4. » Veil Nebula

 
Veil Nebula...

Astrografia

View gallery (25 photos)

Veil Nebula sent on September 12, 2013 (16:28) by Fabercom. 14 comments, 1338 views.

, Posa B f/4.0, ISO 1250, tripod.

Praticamente la mia seconda astrofoto realizzata con un minimo di criterio. Lo so gli errori sono molti, ma massacratemi che devo imparare. 5d2+70-200 su eq6 pro Guida con Lacerta stand alone su cercatore 9x50 10 scatti da 480 secondi + 10 raw e 10 bias, nessun flat perché sapevo di dover croppare parecchio.





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avatarjunior
sent on September 12, 2013 (16:49) | This comment has been automatically translated (show/hide original)

A beautiful field! The picture, however, I find it a bit 'too tight.
hello.

avatarjunior
sent on September 12, 2013 (16:53) | This comment has been automatically translated (show/hide original)

you're probably right but as I realize when is the limit beyond which I do not have to go?

avatarjunior
sent on September 12, 2013 (17:02) | This comment has been automatically translated (show/hide original)

It 'hard to say, I use as an example of great astro photos, especially the colors.
But if the signal is missing is useless to try to pull him out, you only need to integrate more.
I suggest you pull until the stars are still decent and not pulped.
hello.

avatarsenior
sent on September 12, 2013 (17:53) | This comment has been automatically translated (show/hide original)

I agree with Sway. In this image lacks especially the signal and is very noisy, not all those dots are stars. The colors, however, are not bad. Please try processing a little 'softer when you start seeing the emergence of too many artifacts to say that you went over. It 'still useful to have already seen some beautiful images of the subject, otherwise you may not know if the details that are out there they are invented or we really exist. I cropperei even a little 'less, it is true that 200 mm are not very many, but not unpleasant that the subject appears well surrounded by his stellar field, which in the case of objects like this, immersed in the Milky Way is very rich. Croppando too is also more likely to notice the lack of detail and you tend to tread the drawing hand.

hello!

Chiara

avatarjunior
sent on September 12, 2013 (18:49) | This comment has been automatically translated (show/hide original)

perfect, thanks Sway and advice always available thanks to Chiara.

avatarsenior
sent on September 13, 2013 (8:53) | This comment has been automatically translated (show/hide original)

Hello Fabercom, as you are with the Lacerta Mgen v2?

One of the few things I realized is that 100% back to weak signals have to do a lot of photos with such integration ... for this I'm trying to equip myself with my chances, I'm waiting for my camera that I sent to change and I hope to start to make things a little more seriously, just as you are doing. Happy Birthday Fabercom. Beppe

avatarjunior
sent on September 13, 2013 (11:48) | This comment has been automatically translated (show/hide original)

Hello Beppe, I have not the experience to make good shots but I am putting all to learn.
I like you all a great help.
I just purchased thanks to all the advice Helium (user of this forum) a nice Apo refractor 115-800 moonlite focuser with 2.5 ", now I will provide for reducer / flattener Riccardi and anti-pollution filter. Gradually, however, the Money is scarce.

The lacerta is fantastic if you do not want to use the computer, but you have to find the guide star on a display really small and sometimes is a bit 'mangy, but so far it went well at least guide the objectives.
In fact I'm trying to solve a strange problem. Guido with lacerta attached to a Celestron 9x50 finder, this holds up well if I am driving up to 400mm lenses, herendo, however, the main telescope is a newton 1000 f / 5, the stars are clearly moves. I could not figure out if it is the lacerta that does not hold, the seeker that is too short or something moving in the setup, not to mention the frame.
Now try using the lacerta always with the seeker, to guide the much more stable new refractor.

For the poses, some argue that they are better in many shots mean time, others say that it only takes a few shots with long exposures.
I'll tell you what I think: The reason for which we make several clicks, stems from the fact that the sky is not always the same (see humidity, turbulence, clouds etc. ..). So more clicks means more added photos from which to get the best dettagthem. The duration of exposure instead implies precisely the amount of signal collected always in relation to the type of subject. In short, for the most vulnerable, it is first necessary to make long exposure to the number of shots however, obvious that the more the better, but if the sky is perfect bastarne could also few. This is what I have deduced, maybe I'm wrong.

I hope you have entrusted your reflex in experienced hands, in many cases, if the work is not done properly you lose af well as automatic white balance. I did extensive research on the matter, asked the most well-known amateur on the net and I even contacted the Baader same. It seems that the problem lies in the grommets on which the frame of the filter, you just lose one or attach it to the millimeter that have substantial probting back or front focus in af automatically.

Let me know how it goes your edit.
Regards and clear skies.

avatarjunior
sent on September 13, 2013 (13:53) | This comment has been automatically translated (show/hide original)

Hello, I think your driving problem stems from the fact that driving with the seeker you are too short (if I remember correctly is a 225 mm focal length) for the newton 200 mm. Then also consider the "leverage" that develops 200/1000 ... just a breath of wind to move it, which was not the case with the remote.

As regards the duration of the shots I tell you that the sky is always to decide, not us. You must always do the poses longer than the sky of such a place that will let you, and stop just before it saturated the sensor. I am in my place of photography in Valcamonica can be up to 10 minutes, but at home (also with filter cls) do not pass the two. The important thing is to do many poses, however, since it is the only way to increase the signal / noise (the noise is not linear as the signal, but random and grows by virtue ofsquare root of the number of exposures).
Hello, skies (and dark).

avatarsenior
sent on September 13, 2013 (22:59) | This comment has been automatically translated (show/hide original)

Hello Fabercom, the camera has been in the hands of Artesky in Novara, I suggested that David knows him well, but it's been a week and the camera do not have it yet, I try to call tomorrow morning. As I've said, I can well imagine the difficulties, as usual it all comes from that at issue sonantibus I wonder why always in short supply, so there is nothing left to learn how to do things well with what we already have. For the poses you are right, you and Sway, there are many theories, but I think it also takes a bit of common sense that it depends on the equipment one has. I never excelled for the amount of poses, even for offsets, but if tomorrow night could put on M8 with the current means that I have, that is, with the iOptron Smarteq Pro, with 200mm f/2.8 + teleconverter, at least 20 would pose 120 "+ 10 poses150 "to be able to integrate in case of need, of course, offset + abundant, because I already know how it behaves my 450D to 800 ISO, on the other hand I've never heard of a crisis of rejection for indigestion offset:-D the watchword is to experiment, experiment, experiment, then let's do it then:-D Good work and the next one! Beppe

avatarsenior
sent on September 14, 2013 (10:46) | This comment has been automatically translated (show/hide original)

I've heard that many drive with a simple finder with Lacerta and with excellent results. It would be my idea for the future to try, is a great advantage in not having to carry a telescope, though small. I think in your case the driving problems are more due to bending of the pipe / coupling system that is not a real error, because the Lacerta is very precise. If the system was really hard I think even with the newton 1000 would succeed to drive the seeker. On the other hand if there are push-ups, even using a guide scope focal length greater, not rectify the problem.

hello!

Chiara

avatarjunior
sent on September 14, 2013 (12:19) | This comment has been automatically translated (show/hide original)

but do you think I should take to enhance the system guide:
a 80-400 f / 5 or
a 230mm F/3.6

better more light and less mm or less light and more mm?

avatarsenior
sent on September 14, 2013 (13:17) | This comment has been automatically translated (show/hide original)

To be precise, the best guide a longer focal length, so the more mm. The Lacerta is sensitive enough to be able to work with less light.
Note, however, always aware of the problem of bending, if not to solve a guide telescope with the same focal length of the recovery does not do you any good.

hello!

Chiara

avatarjunior
sent on September 14, 2013 (15:46) | This comment has been automatically translated (show/hide original)

I just bought a clear Tecnosky 115-800 moonlite focuser with 2.5 "more stable than that does not exist.
I will try as soon as possible.

avatarsenior
sent on September 14, 2013 (19:02) | This comment has been automatically translated (show/hide original)

Not only is the telescope that determines the stability, as is also anchored to the frame and is anchored as the guidance system. With the 115-800, however, you should not have the bending of 1000 newtons.

hello

Chiara


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