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  1. Galleries
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  3. Astrophotography
  4. » M31 19/10/2020

 
M31 19/10/2020...

Astrofoto

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M31 19/10/2020 sent on October 21, 2020 (12:43) by Fabioviti. 0 comments, 859 views. [retina]

, Posa B f/4.0, ISO 1600, tripod.

Il miglior risultato che sono riuscito ad ottenere su questo soggetto fino ad ora. Pentax K3 con Pentacon 300 f4 a tutta apertura. Integrazione con Deep Sky Stacker di 12 immagini singole riprese con sensibilità variabile tra 800 e 1600 Iso e pose tra 30 e 90 secondi. Integrazione totale di 12 minuti circa in esposizione. Cielo limpido, seeing discreto e umidità non eccessiva ma presente. Inseguimento con Sky Watcher Star Adventurer. Treppiede piantato nel terreno con i puntali metallici per garantire stabilità. Scatto comandato a distanza da smartphone con Miops Smart e scatti ritardati di 2 secondi dal sollevamento dello specchio. Con questi accorgimenti l'80% degli scatti sono risultati perfettamente guidati e con stelle puntiformi su tutto il fotogramma, Il rimanente 20% presenta un leggero sbandamento probabilmente provocato da errori periodici nell'inseguimento o da qualcos'altro che non so spiegarmi



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