RCE Foto

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  1. Galleries
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  4. » Untitled Photo

 
Untitled Photo...

Astrofoto

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Untitled Photo sent on August 17, 2011 (12:37) by Valerio74. 8 comments, 2870 views.

, Posa B f/3.5, ISO 400, tripod.

Polveri nello Scorpione. Canon Eos 300D, Leica Apo Telyt 180mm f/3,4 utilizzato a tutta apertura. 400 ISO, 80 minuti di posa complessiva





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avatarjunior
sent on August 17, 2011 (12:45)


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Rimango affascinato da questi scatti ...che riesco male a giudicare a livelo tecnico ma a livello di gusto, ti faccio i miei complikenti

I remain fascinated by these shots ... I can hurt to judge technical level ad but in terms of taste, I make my complikenti

avatarjunior
sent on August 18, 2011 (18:54)


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SPETTACOLARE!!!!
Ma 80 minuti con uno scatto solo???
E con quale montatura hai inseguito???

Complimenti
ciao

SPECTACULAR!!
But 80 minutes with a single click??
And with what frame you chased??

Compliments
hello

avatarsenior
sent on August 18, 2011 (22:08)


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Grazie, sono 8 scatti da 10 minuti l'uno. Il tutto su montatura Takahashi EM-10, senza autoguida

Thanks, I'm 8 shots for 10 minutes each. The frame is all about Takahashi EM-10, without autoguiding

avatarsenior
sent on August 21, 2011 (21:46)


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Molto bella! Senza autoguida, quindi guida con reticolo? Avrei saturato un pochino di più i colori, specialmente le stelle sono un po' pallidine. C'è un riflesso rosso sopra ad Antares, accanto a sinistra del globulare, probabilmente un riflesso di Antares stessa. Tra l'alto immagino che tu abbia elaborato le pose in modo da tenere molto bassa la luminosità di Antares, che di solito spara parecchio.

Ciao!
Chiara



Very beautiful! Without autoguiding, then driving with grid? I would have a little more saturated colors, especially the stars are a bit 'pallidine. There is a red glow above Antares, next to the left of the globular, probably a reflection of Antares itself. Between the upper imagine that you have developed the poses in order to keep a very low brightness of Antares, which usually shoots a lot.

Hello!
Clear


avatarsenior
sent on August 22, 2011 (12:41)


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Ciao Chiara,
grazie del commento. Senza autoguida intendo proprio che non ho fatto correzioni, ho lasciato la montatura accesa senza controllare in alcun modo l'inseguimento affidandomi alla precisione meccanica della stessa. Per Antares non ho fatto alcun lavoro di contenimento, era già piuttosto "contenuta" di suo. Per i colori mi servirebbero più pose, altrimenti salta fuori troppo il rumore se cerco di saturare ulteriormente. A presto

V

Hello Clare,
thanks for the comment. Without autoguiding I mean I did not do corrections, I left the mount on without control in any way the pursuit entrusting the mechanical precision of the same. For Antares I have not done any work containment was already quite "contained" of his own. For colors I would need more poses, otherwise it falls out too much noise when I try to saturate further. See you soon

V

avatarjunior
sent on March 07, 2012 (17:29)


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dunque questa e' una posa totale di 80 minuti a 400 iso, secondo voi con la 5d mark iii 10 minuti di posa a 3200 iso si puo sperare in un risultato similare a parita di tutte le altre condizioni? p.s. bellissimi colori, stelle belle puntiformi, complimenti.

and therefore this' pose a total of 80 minutes at 400 iso, do you think with the 5d mark iii 10 minutes of exposure in ISO 3200 you can expect a similar result in equality of all other conditions? ps beautiful colors, beautiful star point, congratulations.

avatarsenior
sent on March 08, 2012 (8:46)


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Grazie Coprolog
" secondo voi con la 5d mark iii 10 minuti di posa a 3200 iso si puo sperare in un risultato similare a parita di tutte le altre condizioni?" Nel concetto classico di fotografia, la tripletta tempo, diaframma, sensibilità sono equivalenti, ma in questo genere di foto, in cui il soggetto è molto debole, tenere aperto fisicamente l'otturatore per 80 minuti consente a un maggior numero di fotoni di andare ad eccitare i fotorecettori del sensore, per cui l'equivalenza, secondo anche la mia esperienza, non è perfettamente valida. Tuttavia c'è da considerare che la 5D mk III offrirebbe un sensore molto più moderno e, presumo, con un'efficenza quantica migliore di quella dei sensori che ho usato io, per cui potrebbe compensare in parte il minor numero di fotoni incidenti per la posa minore. Spero di essermi spiegato.

Thanks Coprolog
do you think the 5d mark iii 10 minutes of exposure in ISO 3200 you can expect a similar result in equality of all other conditions?
In the classical concept of photography, the triplet shutter speed, aperture, sensitivity are equivalents, but in this kind of picture, in which the subject is very weak, physically hold open the shutter for 80 minutes allows a greater number of photons to go to excite the photoreceptors of the sensor, for which the equivalence, according also In my experience, it is perfectly valid. However, you must consider that the 5D mk III sensor would provide a much more modern and, I presume, with an efficiency better than that of quantum sensors that I used, so it could offset some of the smaller number of incident photons for pose less. I hope I explained.

avatarjunior
sent on March 08, 2012 (18:49)


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si, perfettamente.
grazie


yes, perfectly.
thanks


RCE Foto

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