The ring of Barnard with 50mm

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Galleries
Astrophotography

3.0 MEGAPIXEL

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foto astronomiche View gallery (21 photos)

The ring of Barnard with 50mm sent on June 02, 2012 (14:49) by Skender Buci. 3 comments, 1683 views.

, Posa B f/3.2, ISO 1000, tripod.

View High Resolution 3.0 MP

6 persons like it: Beppe Reda, Gaijin, Johnjz, Lucapucci, Quellolà, Slashleo

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Canopo70

sent on June 02, 2012 (15:06)

This comment is too long to be automatically translated, so it will be shown in its original language (Italian)

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La foto è profonda ,riuscire a riprendere l arco di barnard non è semplice ... bisogna operare sotto cieli molto bui...peccato che la resa ottica del 50mm non sia proprio di ottimo livello.. noto anche un pò di rotazione
nell angolo a destra.
Io avrei compositato due foto definire M42 completamente satura dalla posa
l'ha foto è stata ottenuta da un'unica posa giusto?quanti minuti?

The picture is deep, able to resume the arc barnard is not easy ... must operate under very dark skies ... too bad that the optical performance of the 50mm is just excellent .. also known a little of rotation
in the right corner.
I would define two photos composited M42 fully saturated after application
has picture has been obtained from a single pose right? many minutes?

Skender Buci

sent on June 02, 2012 (15:23)

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Infatti anche io capisco che questo 50mm f1.8 soffre di aberrazione cromatica ma presto lo sostituirò col f1.4,ti confesso che era solo una prova per vedere il limite della mia ex nikon d 90 che sono rimasto sbalordito veder l'anello di barnard da un cielo cittadino San Giovanni in P di Bologna.Come vedete in astrofotografia non bisogna fare errori perché si notano subito!!dati somma di 15 pose da 2 minuti a 800 iso col filtro UHC_S!!

In fact, even I understand that this 50mm f1.8 suffers from chromatic aberration but soon I will replace with the f1.4, I confess that it was just a test to see the extent of my ex nikon d 90 that I was amazed to see the ring barnard a sky city of St. John P Bologna.Come see in astrophotography you do not make mistakes because you can see it now! data sum of 15 exposures of 2 minutes at 800 iso with filter UHC_S!

Canopo70

sent on June 03, 2012 (23:04)

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Lo so... comunque se hai la possibilità di guidare ,chiudendo il diaframma dovrebbe migliorare decisamente... dovresti provare a fare qualche dark e flat-field e sottrarli poi con software dedicati dovresti migliorare
decisamente le riprese, non credo che sostituendo il tuo 50mm con quello più luminoso migliorerai il cromatismo ...in astronomia le cose sono diverse dalla fotografia tradizionale .Lo splendido sfocato ottenuto
con un 85 1.2 per un ritratto e una cosa.. ma lo stesso 85 1.2 a tutta apertura su un campo stellare non si esprime proprio nella stessa maniera... dal centro hai bordi la puntiformità stellare si altera in modo molto marcato... un amico ha ottenuto splendidi campi montando un'ottica hasselblad da 80mm sulla D700 chiudendo il diaframma a f 5.6 ,in quel caso grazie al grande cerchio immagine e il diaframma chiuso ha ottenuno
foto con puntiformità omogenea tra centro e bordi... sembravano foto fatte con un FSQ ;)
comunque le tue foto sono molto belle puoi solo migliorare ;)

I know ... however, if you have the chance to drive, closing the diaphragm should dramatically improve ... you should try to do some dark and flat-field and then subtract them with dedicated software should improve
much shooting, I do not think that replacing your 50mm with the brighter coloring will improve ... in astronomy, things are different from traditional photography. Beautiful blurred obtained
with a 85 1.2 for a portrait and one thing .. but the same 85 1.2 wide open on a star field is expressed not just in the same way ... from the center to the edges you puntiformità stellar alters in a very marked ... a friend got beautiful golf mounting optics hasselblad 80mm on the D700 by stopping down to f 5.6, in this case due to the large image circle and the aperture has ottenuno
photos with puntiformità homogeneous cent betweenro and edges ... seemed photos taken with a FSQ ;)
however, your photos are very beautiful can only get better ;)

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