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  1. Galleries
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  3. Astrophotography
  4. » The Great Orion Nebula

 
The Great Orion Nebula...

Astrofotografia

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The Great Orion Nebula sent on October 29, 2015 (9:34) by Marcojetflyer. 6 comments, 2336 views. [retina]

Posa B f/4.5, ISO 1600, tripod.

Luogo della ripresa: Lignan (Aosta) Telescopio: Teleobiettivo Nikon Nikkor Ai 300mm ED f/4.5 Non-IF Montatura: Celestron CG5 Camera: Canon 20Da Filtri: Nessun filtro Guida: Senza guida Pose: 20 pose da 8 sec - 15 sec - 30 sec - 1,5 min (totale 80 pose) Elaborazione: Deep Sky Stacker e Photoshop Note: Calibrazione (con Darks / Flats / Flats darks / Bias) e stacking con Deep Sky Stacker. Elaborazione cosmetica con Photoshop e Noel Carboni Astro Actions. La fotografia finale è una composizione HDR per rendere visibili le stelle del Trapezio senza sovraesporre la zona al centro di M42. Data scatto: 11/10/2015



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user28347
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sent on October 29, 2015 (10:19)


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mi sta facendo venir voglia di provare col mio 300f4 e montarlo sopra il telescopio che funge da guida con 30 secondi scatto singolo ,che ne pensi?sono fantastiche

I is making me want to try with my 300f4 and mount it on the telescope that serves as a guide with 30 seconds single shot, what do you think? I am fantastic

avatarsupporter
sent on October 29, 2015 (11:52)


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Bravo, molto bella, bravo, ciao

Bravo, very nice, good, hello

avatarsenior
sent on October 29, 2015 (14:15)


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" mi sta facendo venir voglia di provare col mio 300f4 e montarlo sopra il telescopio che funge da guida con 30 secondi scatto singolo ,che ne pensi?sono fantastiche "

Anche io ci sto pensando da tanto...solo che non saprei come montare il tutto!! MrGreen Aiutino??? MrGreen

me is making me want to try with my 300f4 and mount it on the telescope that serves as a guide with 30 seconds single shot, what do you think? Are fantastic


Even there I'm thinking to much ... I just do not know how to fit it all !! -D Aiutino ??? -D

user28347
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sent on October 29, 2015 (14:49)


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mi son fatto costruire un porta obiettivo da agganciare sopra il telescopio,oppure comprare astroinseguitore da circa 350 euro

I am made to build a port to attach lens on the telescope, or buy astroinseguitore from 350 €

avatarsenior
sent on October 30, 2015 (20:28)


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Bellissima,complimenti

Beautiful, congratulations

avatarjunior
sent on November 16, 2015 (18:51)


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Ciao a tutti,
mi scuso per il ritardo nel rispondervi, non è assolutamente per scortesia ma nei giorni scorsi non ho frequentato il sito.
Ringrazio tutti per gli apprezzamenti e passo a darvi qualche informazione in più Sorriso
Penso che il Canon 300 f4 L sia molto valido per questo tipo di fotografie, 30 secondi di posa da un cielo urbano o suburbano (con inquinamento luminoso) possono essere pochi ma... tentare non nuoce!
Se la tua montatura insegue bene anche pose dell'ordine di 1-1,5 minuti potrebbero riuscire bene.
La massima lunghezza di posa utile si raggiunge quando la 'montagna' dell'istogramma si stacca dal punto del nero di un 10% circa dell'intervallo tonale disponibile. Oltre questa durata si otterrà un fondo cielo più chiaro ma non si avrà miglioramento sul soggetto ripreso.
Posso suggerire di fare diverse decine di immagini singole (40-50 almeno, più sono meglio è ;-)) e di usare DSS, ovvero Deep Sky Stacker (programma gratis) per lo 'stacking' ovvero la sintesi delle 50 pose in una immagine singola.
DSS riesce a gestire decine di immagini in modo molto affidabile anche se i tempi di elaborazione possono essere un po' lunghi.
Spero di esservi stato d'aiuto, sono sempre disponibile a rispondere a domande o curiosità.
Un caro saluto
Marco

Hello to all,
I apologize for the delay in the answer, absolutely not being rude but in recent days I have not attended the site.
Thank you all for the appreciation and step to give you some more information :-)
I think the Canon 300 f4 L is very good for this type of photographs, 30 seconds of exposure to a sky urban or suburban (with light pollution) can be few but ... does not harm groped!
If your mount tracks well placed in the order of 1-1.5 minutes could do well.
The maximum length of pose useful when you reach the 'mountain' histogram is detached from the black point of a 10% about the tonal range available. Besides this time you will get a clearer sky background but you will improvechin on the subject again.
I suggest making several tens of single images (at least 40 to 50, the more the better ;-)) and use DSS, or Deep Sky Stacker (free program) to the 'stacking' or the synthesis of 50 poses in a picture single.
DSS is able to handle tens of images in a very reliable way even if the processing time can be a bit 'long.
I hope to be a help, are always available to answer questions or curiosity.
Greetings
Marco


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