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  1. Galleries
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  3. Astrophotography
  4. » Barnard 33

 
Barnard 33...

Nebulose

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Barnard 33 sent on January 21, 2018 (8:05) by Stefano_C. 44 comments, 4410 views.

Visuale inusuale di questa splendida nebulosa oscura. Immagine in H alpha, falsi colori


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avatarsenior
sent on January 21, 2018 (8:07) | This comment has been automatically translated (show/hide original)

I want to try to give an unusual view of this splendid dark nebula, the Barnard 33, or more commonly called the Horsehead



Shooting data available on my site
[URL =] stefano-campani.000webhostapp.com/index.php/home-page/cavallofalsicolo

avatarsenior
sent on January 21, 2018 (9:29) | This comment has been automatically translated (show/hide original)

Now I'll block you :-D joke ..,
Did you use a "sort" of hubble palette? We are about 5 m focal length in this photo: -o
Compliments
Ale

avatarsenior
sent on January 21, 2018 (9:35) | This comment has been automatically translated (show/hide original)

Hi Canopus
no, do not block me !! :-( :-D

simplifying the concept I have associated with various light intensities some colors. is a sort of gradient map. The difference with the gradient map is that the light contrasts are managed separately, because in the astronomical photos the contrasts of light are really super-tenuous or very extreme

The hubble palette refers more to associating different color channels (RG and B) to narrowband shots at different wavelengths, for example the classic Ha OIII and SII

In this case it is only Ha, remapped intensity-color
is the first experiment I do and I must say that I really enjoyed it, but I'm curious to see what others think

avatarsenior
sent on January 21, 2018 (9:44) | This comment has been automatically translated (show/hide original)

Very good anyone who can produce certain images always has my admiration, for me astrophotography (given my total ignorance on the subject) turns out to be a kind of secret alchemy where you use magic equipment. So you're a very good alchemist :-D

avatarsenior
sent on January 21, 2018 (9:47) | This comment has been automatically translated (show/hide original)

Thank you so much grekon!
I like alchemist :-D

avatarsenior
sent on January 21, 2018 (9:51) | This comment has been automatically translated (show/hide original)

Understood .. :-D ... I'm trying to make the rosette in the hubble palette
We see that I combine .. :-D
Beautiful anyway

avatarsenior
sent on January 21, 2018 (9:52) | This comment has been automatically translated (show/hide original)

Thank you
On some monitors, maybe it's a bit too dark and saturated .. I'll be there in a few days ... never insist too much on the same processing

PS if you need a hand for the rosette ask ;-)
I'm curious to see the result you'll get!

avatarsenior
sent on January 21, 2018 (10:27) | This comment has been automatically translated (show/hide original)

I like it because it leaves the usual canons of processing of purely educational frames. Pictorial with this combination of colors. 8-) 8-) 8-)

avatarsenior
sent on January 21, 2018 (11:01) | This comment has been automatically translated (show/hide original)

One thing always wonders but the image you do not see it live, how do you then understand that it is the one that must come out as a final result or wrong?

avatarsenior
sent on January 21, 2018 (11:23) | This comment has been automatically translated (show/hide original)

The hubble palette is a recovery in "false colors" .. in practice there are the emissions of the ionized chemical compounds present in the nebula.
The tri-color is based on the recovery in Halfa - OIII (third oxygen) and SII (sulfur) the mess is to mix well the channels ..
In H alpha you usually have a lot of signal while in the other two bands little: phase: if you talk about vision at "color" level
It is not usually seen by eye ...


avatarsenior
sent on January 21, 2018 (11:25) | This comment has been automatically translated (show/hide original)

Really beautiful Stefano, congratulations.
gp

avatarsenior
sent on January 21, 2018 (11:31) | This comment has been automatically translated (show/hide original)


avatarsenior
sent on January 21, 2018 (11:54) | This comment has been automatically translated (show/hide original)

But now it's simpler, usually with 15 seconds of laying the objects begin to see them on the monitor .. and this allows to improve the framing :-)
I remember when I went to Nivolet and photographed with the slide: phase: they were ca..i .... and guided by hand: phase:

avatarsenior
sent on January 21, 2018 (12:00) | This comment has been automatically translated (show/hide original)

You are absolutely right
In general yes it is so, especially if you photograph known objects.
More times than the film! (in the last few years, opportunities have opened up for amateurs who, 30 years ago, were within reach of the greatest observatories)

But I'll give you an example, when I photographed M82 that I did not know had that extensive cloud Ha around I lost more than 4 hours of poses before realizing that there was a cloud of dust that went well beyond the field framed

avatarsenior
sent on January 21, 2018 (12:42) | This comment has been automatically translated (show/hide original)

So I'm wrong when I say you're an alchemist !? ;-) on average what do you need as basic equipment?

avatarsenior
sent on January 21, 2018 (13:04) | This comment has been automatically translated (show/hide original)

To start, a good star tracker with a modified SLR.
By modification we mean the removal of the ir-cut filter to make it more sensitive
In certain frequencies. Then if equipped with a filter (I really like L idas lps p2 hutech) better yet.

avatarsupporter
sent on January 21, 2018 (14:16) | This comment has been automatically translated (show/hide original)

These shots are for me pure science fiction
I really do not even know where to start to give one

avatarsenior
sent on January 21, 2018 (14:23) | This comment has been translated

Marvelous photo!

avatarjunior
sent on January 21, 2018 (14:53) | This comment has been translated

Beautiful!

avatarsenior
sent on January 21, 2018 (17:22) | This comment has been translated

Thank you!


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