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  1. Galleries
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    3. » Dolphin Nebula (SH2-308)
 
Dolphin Nebula (SH2-308)

Astronomia

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Dolphin Nebula (SH2-308) sent on 24 Gennaio 2026 (18:08) by Antomar21. 6 comments, 190 views.

Distante circa 1875 anni luce. Ripresa con telescopio Celestron SCT 8" con Hyperstar v4. Montatura ZWO AM5N, camera ASI 2600 MM Duo. Ripresa: 6 ore Ha + 6 ore Oiii Sere del 28,29,30 dicembre 2025, Trento città.


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avatarsenior
sent on 25 Gennaio 2026 (8:49) | This comment has been automatically translated (show/hide original)    

Nice shot, but zooming in on the image you can see aberrations on the stars. I'm also arguing with the same problem. Have you tried to calibrate the focal plane of the camera using the screws of the hyperstar?
Greetings Marzio

avatarjunior
sent on 25 Gennaio 2026 (15:02)


This comment is too long to be automatically translated, so it will be shown in its original language (Italian)  

Click here to translate the comment in English [en]


Ciao, Marzio. Grazie della visita e del commento. Hai centrato il problema! In realtà si tratta delle prime immagini realizzate con Hyperstar. C'è un problema di parallelismo rispetto al sensore ma anche di backfocus troppo lungo. Data la scarsità di notti serene qui a Trento ho deciso di portare comunque a termine la postproduzione, mascherando il più possibile i difetti (che restano comunque evidenti). Risolto il problema di backfocus, farò pratica di allineamento del tilt.
Un saluto.    


avatarsupporter
sent on 25 Gennaio 2026 (18:11) | This comment has been translated    

Marvelous!

avatarjunior
sent on 25 Gennaio 2026 (18:15) | This comment has been automatically translated (show/hide original)    

Thanks, Simoneperi1967!
Greetings.

avatarsenior
sent on 26 Gennaio 2026 (0:28) | This comment has been automatically translated (show/hide original)    

You have done spectacular work, congratulations for the passion you put into it.
--
Hi Max

avatarjunior
sent on 26 Gennaio 2026 (0:40) | This comment has been automatically translated (show/hide original)    

Thanks Massimo!
Greetings.


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