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  1. Galleries
  2. »
  3. Landscape (wilderness)
  4. » The sky on the Liguria

 
The sky on the Liguria...

Landscapes

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The sky on the Liguria sent on July 04, 2015 (22:20) by Davide Suanno. 10 comments, 898 views.

, 25 sec f/4.5, ISO 5000, tripod.

Affascinato dagli splendidi lavori visti sul forum di cui credo, e non me ne si voglia se sbaglio, il precursore è stato E. Brotto, ho voluto cimentarmi nella ripresa della via Lattea nella sua interezza. Il risultato non è certo paragonabile ad altri, ma si tratta del mio primo tentativo. Ho scattato nei pressi del rifugio Pratorotondo nel parco del Beigua, ho atteso il calare della luna e verso le due del mattino ho effettuato gli scatti. Ho posizionato la fotocamera in verticale tiltandola verso l'alto di 30 gradi, ho scattato in sei direzioni distanziate di 45 gradi l'una dall'altra da est verso ovest coprendo un angolo di campo di circa 210 gradi. Sulla sinistra è visibile Genova, al centro Arenzano più a destra il riverbero delle luci di Savona all'estrema destra le luci delle antenne per telecomunicazioni sulla cima del Beigua. Per ogni posizione della fotocamera ho effettuato due scatti, entrambi a 5000 iso f/4,5. Ho esposto le stelle per 25 secondi mentre le luci delle città per 8 secondi impostando l'esecuzione di un dark in automatico dopo ogni scatto. Ho preso in considerazione una ulteriore esposizione per il primo piano ma in dubbio ho preferito non violentare il sensore con i lampioni di Genova per diversi minuti, preferendo lasciarlo in silhouette. Ho sviluppato i Raw con lightroom 5 riuscendo a recuperare moltissimo nel primo piano, soprattutto al centro mentre per le stelle ho seguito i consigli del tutorial di S. Arrighi. Non ho applicato sharpen perché in fase di riduzione l'immagine ha acquistato molta, troppa nitidezza. L'errore principale che ho commesso in fase di ripresa è stato di non considerare la distorsione dell'ottica; pur avendo abbondantemente sovrapposto i fotogrammi ho avuto grandi difficoltà a fondere i livelli tra loro a causa del movimento apparente degli oggetti tra primo piano, secondo piano e sfondo. La prossima volta effettuerò più riprese diminuendo la distanza angolare tra gli scatti. Altra cosa che credo cambierò sarà il tempo di posa, pur avendo scattato a 12 mm guardando gli scatti al 100% le stelle non sono (affatto!) puntiformi. Se chi ne sa più di me, e ce ne sono, vuol darmi un consiglio o farmi una critica costruttiva sarà ben accetta. Altro titolo: Lost in Post Production.





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avatarsenior
sent on July 04, 2015 (23:00) | This comment has been automatically translated (show/hide original)

Excellent, well done!

avatarsenior
sent on July 05, 2015 (0:33) | This comment has been automatically translated (show/hide original)

Beautiful beautiful beautiful !!!

avatarsupporter
sent on July 05, 2015 (7:08) | This comment has been automatically translated (show/hide original)

Very nice, good, hello

avatarsenior
sent on July 05, 2015 (9:54) | This comment has been automatically translated (show/hide original)

Congratulations great job and I thank you for sharing with us all the technical aspects that we were behind the making of this release

avatarjunior
sent on July 05, 2015 (11:14) | This comment has been automatically translated (show/hide original)

I thank everyone for the transition and comments.
"I thank you for sharing with us all the technical aspects that we were behind the making of this release"

Sharing knowledge is :-)
autori.fanpage.it/conoscenza-e-condivisione/

avatarjunior
sent on July 05, 2015 (11:36) | This comment has been automatically translated (show/hide original)

Congratulations for the photo, really well done!
I read the description and reasoning of the shake-star I can think of that:
) If you were to 12 mm, with a 25 second exposure the stars should have come good point, in fact, that time largely respects the rule of the 600 (and 500)
) It is therefore possible that you have accidentally taken a greater focus, your being a zoom lens. To check this you should check the details of shooting!
) Most probably, being 25 seconds a very long time, there have been vibrations that have moved up the tripod. You have a very stable tripod?
Or maybe some knob was a little loose, and in 25 seconds you could be verified a slight displacement of the machine due to its weight

Sbut Essert was d 'help ...
Best wishes,
Orlando

avatarjunior
sent on July 05, 2015 (12:34) | This comment has been automatically translated (show/hide original)

Hello Orlando,
I think the rule of thumb is 600 and does not take into account the density sensor,
the focal shutter is 12mm, I verified ;-)
Tripod is used a Manfrotto 055 cx pro4 carbon legs retracted and geared head 410, I do not think it is because shake-displayed at 100% all the stars have the same aspect ratio typical of Earth's rotation.
A warm greeting to you

avatarjunior
sent on July 06, 2015 (0:27) | This comment has been automatically translated (show/hide original)

Great then, we have already ruled out other factors! -D

avatarsenior
sent on January 03, 2016 (15:08) | This comment has been automatically translated (show/hide original)

Wow wow! I would say that to be was your first attempt at astrophotography is absolutely nothing wrong ;-)
I agree with those who appreciate your having described all the technical that allowed you to build this beautiful picture :-)

avatarjunior
sent on January 04, 2016 (20:31) | This comment has been automatically translated (show/hide original)

actually this is the first attempt to make a reproduction of the Milky Way reproducing it as a bow though it has a linear shape. In the past I tried in the high mountains but the results were bad at the time I photographed with a fuji s5 .. honestly the greatest merit goes to the performance at high ISO sensor ..
The description, in hindsight, I should add that if I rotate the camera around the nodal point I would not have tried so hard to blend layers in PP.

Hello!


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