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  1. Galleries
  2. »
  3. Astrophotography
  4. » Seagull Nebula and Thor's helmet

 
Seagull Nebula and Thor's helmet...

Deep Sky2

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Seagull Nebula and Thor's helmet sent on March 18, 2019 (8:21) by Goldrake. 13 comments, 679 views.

OGGETTO - Nebulosa Gabbiano e Elmo di Thor CAMERA DI ACQUISIZIONE - Canon 50D MODIFICATA + FILTRO Filtro Hutech IDAS LPS D1 OBIETTIVO - Zoom Canon 100 f/2.8 macro LUNGHEZZA FOCALE: 100mm APERTURA: f/4 TEMPO ESPOSIZIONE: 3h e 06' (62 pose da 180 secondi) ISO 1600 DARK - n.4 BIAS - n. 31 FLAT - n. 21 MONTATURA: Skywatcher StarAdventurer L'Elmo di Thor è picco piccolo, ma sono riuscito a prenderlo, serata con luna quasi a metà ma va bene lo stesso


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avatarsupporter
sent on March 18, 2019 (9:31) | This comment has been automatically translated (show/hide original)

Exotic and very difficult objects, Nice shot :-D

avatarsenior
sent on March 18, 2019 (10:10) | This comment has been automatically translated (show/hide original)

Thanks Marzio, I wanted to try a change made to my equipment needless to hope to bring out something with the moon almost halfway to the end instead I brought home a little bit the same

avatarsenior
sent on March 18, 2019 (13:53) | This comment has been automatically translated (show/hide original)

I see a great pursuit and also a discreet balance of colors. It seems to me that there is only a slight magenta cast (from the Cel I could also be mistaken). But you need to lower the ISO. X your reflex you get the max between the 400 and the ISO 800.

avatarjunior
sent on March 18, 2019 (14:02) | This comment has been automatically translated (show/hide original)

If you can integrate you will pull out a nice picture, unfortunately as you have already written this object is very difficult and now this part of heaven is declining, put it in the viewfinder for next year ;-) ;-)

avatarsenior
sent on March 18, 2019 (14:25) | This comment has been automatically translated (show/hide original)

Thanks, for the ISO talk I'm deepening I have to do a test to understand at what value the noise does not rise, I know that my machine is ISO-variant, I found an article that illustrates the method to be performed to figure out what value is the best, in machine Soldoni on Tripod shots a photo in twilight at home, one for each ISO value, 100. 200, 400..... up to 3200, then in post production bring all the shots to the same ISO value, then the 100 you raise it 5 stop the 200 of 4 and so on, at this point check where the noise is better.

avatarsenior
sent on March 18, 2019 (14:32) | This comment has been automatically translated (show/hide original)

If you're looking for the apt matrix Canon Find what I told you

avatarsenior
sent on March 18, 2019 (14:34) | This comment has been automatically translated (show/hide original)

Ok thanks

avatarsenior
sent on March 18, 2019 (19:25) | This comment has been automatically translated (show/hide original)

Nothing ;-)

avatarsenior
sent on March 26, 2019 (20:44) | This comment has been automatically translated (show/hide original)

I tried to do a test of ISO to figure out if what is written on the 50D corresponds to the true, are shots made on easel in manual same values I modified only the ISO, then in the camera raw or plywood lifting the stops to equates them all to ISO 1600 , then on the first at ISO 100 I raised 4 stop at ISO 200 3 stop and so on, to look at the results you would say that the best values are found from 1250 to rise where in practice the noise no longer grows
[IMG]http://i67.tinypic.com/msf0yc.jpg [/IMG]
so the story That the best results you have at 400 and 800 ISO leaves me some doubt

avatarsenior
sent on March 26, 2019 (21:45) | This comment has been automatically translated (show/hide original)

Attentive... You've been clearing the detail and you have 1 deviation of color...

avatarsenior
sent on March 26, 2019 (21:54) | This comment has been automatically translated (show/hide original)

We agree that going up with the ISO The dynamic range is lowered, but if we make a pure speech of noise I get worse I do not see indeed, in a shot in deep sky to a nebula I do not think the main problem is GD, we are not facing a sunset in CU I have to shoot in bracketing to embrace everything, I see that I manage better the ISO 1600 with mine than the ISO 800.

avatarsenior
sent on March 27, 2019 (8:06) | This comment has been automatically translated (show/hide original)

Going up with the ISO you see less noise in that test you did but you lost detail in an obvious way. Also having decreased the dynamic range you will feel a lot in the strech phase. Then Consider that after some shots the thermal noise increases. From What I see I would definitely go to ISO 800. Then maybe intervenes in the discussion QS also Rasauq and enlighten us... or destroys us... :-D. If you ask him, he will certainly be happy to help you.

avatarjunior
sent on March 27, 2019 (12:07) | This comment has been automatically translated (show/hide original)



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