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| sent on July 18, 2021 (0:00) | This comment has been automatically translated (show/hide original)
Beautiful photo, eye that 30 sec. are a bit too many, you have to take into account the earth's rotation :-D Bella foto, occhio che 30 sec. sono un pò troppi, devi tener conto della rotazione terrestre  |
| sent on July 18, 2021 (10:15) | This comment has been automatically translated (show/hide original)
Oh yes thanks, I did not calculate the rule of 450. If it will be good weather, the next new moon I want to try again to shoot at f1.4 lowering the time. Lipperlí I thought that closing the diaphragm a little and lengthening the time would increase the definition.
Thanks to the advice.
Pier Luca Eh si grazie, non ho calcolato la regola del 450. Se sarà bel tempo, la prossima luna nuova voglio riprovare a scattare a f1,4 abbassando i tempi. Lipperlí pensavo che chiudendo un po' il diaframma e allungando i tempi si aumentasse la definizione.
Grazie del consiglio.
Pier Luca |
user65640 | sent on July 18, 2021 (12:53) | This comment has been automatically translated (show/hide original)
With the Z6 and the AFS-20 F1.8 I have movement in the stars already at 13 seconds.
E this is because the 600/500/400 rule is an extreme simplification.
I just tell you that even the pixel size of your sensor has reflected on the shutter speed before you start seeing crawled stars so I recommend you to:
- see with a single shot how many seconds you arrive (I guess between 10 and 15);
- raise the iso to cannon (from 3200 to 6400)
- take many shots interspersed one behind the other and then add them up
in the end you will make a very low iso pose for the landscape (so as to have it as noisy as possible) and you will paste over the Milky Way that has come out of the stack.
That's what everyone does then.
Con la Z6 e l'AFS-20 F1.8 io ho movimento nelle stelle già a 13 secondi.
E questo perché la regola del 600/500/400 è un'estrema semplificazione.
Ti dico solo che anche la dimensione dei pixel del tuo sensore ha riflesso sul tempo di scatto prima che inizi a vedere stelle strisciate per cui ti consiglio di:
- vedere con uno scatto singolo a quanti secondi arrivi (immagino tra 10 e 15);
- alzare gli iso a cannone (da 3200 a 6400)
- fare tanti scatti intervallati uno dietro l'altro e poi sommarli
alla fine farai una posa a iso bassissimi per il paesaggio (cosi da averlo meno rumoroso possible) e ci incollerai sopra la via lattea che ti è uscita dallo stack.
E' quello che fanno tutti poi.
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| sent on July 18, 2021 (14:20) | This comment has been automatically translated (show/hide original)
Thanks for your explanation, I didn't really know anything about it. Question, but if I take several shots, doesn't the reverse phenomenon of startrail happen?
Pier Grazie per la tua spiegazione, non ne sapevo veramente nulla. Domanda, ma se faccio diversi scatti, non avviene il fenomeno inverso dello startrail?
Pier |
user65640 | sent on July 18, 2021 (18:41) | This comment has been automatically translated (show/hide original)
The startrail is something else, basically add the lights and come out the crawls.
What I say is to add up the individual photos.
There are free software that do this, such as DSS (deep sky stacker).
Fai a search, it is easy to use.
What happens by adding up several shots is:
- the noise is averaged (read attenuates);
- the pure signal comes out (because the noise is lowered).
It is the principle of astrophotography, it is done in the same way, but it is also fine panoramic milky with tripod shots, as long as there are no crawls. And the iso can be raised without worrying since the noise is mediated.
Lo startrail è un'altra cosa, in pratica sommi li luci ed escono le strisciate.
Quello che dico io è sommare le singole foto.
Ci sono software gratuiti che lo fanno, come ad esempio DSS (deep sky stacker).
Fai una ricerca, è facile da usare.
Quello che accade sommando più scatti è:
- il rumore si fondo si media (leggasi attenua);
- il segnale puro esce (perché il rumore si abbassa).
E' il principio dell'astrofotografia, si fa allo stesso modo, ma va benissimo anche via lattea panoramica con scatti da treppiede, purché non ci siano strisciate. E gli iso si possono alzare senza preoccuparsi visto che il rumore viene mediato.
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| sent on August 07, 2021 (8:52) | This comment has been automatically translated (show/hide original)
Bravo Pier, congratulations Bravo Pier, complimenti |
| sent on August 07, 2021 (9:42) | This comment has been automatically translated (show/hide original)
Very nice ... congratulations .... and very interesting also the advice we read! ;-)
Ciao Mauro Molto bella...complimenti....e molto interessanti anche i consigli che leggiamo!!
Ciao Mauro |
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