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M13...

Astrofotografia

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M13 sent on May 26, 2018 (1:19) by Franco Sgueglia. 13 comments, 584 views. [retina]

Dati di scatto 20 pose da 5 minuti per la luminanza 6 pose da 5 minuti per ciascuno dei 3 canali RGB Focale di ripresa 2350mm ( C925) Camera Moravian 8300 raffreddata a -20gradi Montatura eq8 Sito di Ripresa : Astrobrallo


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avatarjunior
sent on May 26, 2018 (14:52) | This comment has been automatically translated (show/hide original)

A single comment: Wonderful! Look how you solved the nucleus..... :-o
only a slight cyan halo on the Blue stars in high resolution and a bit of noise on the black, anyway real show!

avatarsenior
sent on May 26, 2018 (17:26) | This comment has been automatically translated (show/hide original)

Thank you MARCO!!!!
about the high resolution, I don't know why, but it shows a double image compared to the one I posted. Unless it's Chrome that makes me this joke.

avatarsenior
sent on May 28, 2018 (8:04) | This comment has been automatically translated (show/hide original)

As you said Marco, congratulations PE Ril core, solved very very well. With what instrument did you resume?

avatarsenior
sent on May 28, 2018 (16:47) | This comment has been automatically translated (show/hide original)

Hi Leo, thank you. With a C 925 Edge Hd.

avatarsenior
sent on May 29, 2018 (7:45) | This comment has been automatically translated (show/hide original)

Nice tool!! But the word Edge HD would indicate?

avatarsenior
sent on May 29, 2018 (19:33) | This comment has been automatically translated (show/hide original)

Unlike the normal C 925 that has a Schmidt-Cassegrain pattern formed by an anterior corrector plate, a primary and secondary mirror.... The Edge Hd is added to a rear lens system (at the Eyepiece Cell exit) designed to Flatten the field and correct it from coma and other optical problems. Considering the cost of the instrument compared to other solutions of equal focal and diameter certainly more performing but also 10 times more expensive, I must say that it manages to return good images.

avatarsenior
sent on May 30, 2018 (7:34) | This comment has been automatically translated (show/hide original)

It is a Maksutov with a coma corrector and a flattener already integrated in a few words.
I must say that it manages to return good images
very good I would say! :-D :-D

avatarsenior
sent on May 30, 2018 (7:59) | This comment has been automatically translated (show/hide original)

The Maksutov has an optical scheme that albeit similar varies greatly from the Schmidt Cassegrain.
The frontal lens, which in the SC is planar, in the Maksutov consists of a meniscus. Regardless of
from the posterior coma corrector that in the case of the EDge is something added to the optical path.

avatarjunior
sent on May 30, 2018 (10:18) | This comment has been automatically translated (show/hide original)

But is this system of additional lenses fixed or removable?
and do you know by any chance if it is different from the corrector/smoother they give in homage with the 925 XLT?

avatarsenior
sent on May 30, 2018 (14:10) | This comment has been automatically translated (show/hide original)

Hello mark, is fixed and is part of the instrument you believe is a project
slightly different from XLT, designed completely in this way
to ensure the point of the stars to the edges even in visual
with Eyepieces with visions of field Very wide.
I do not know to what extent it is similar to the smoother concealer even if
on paper do the same things.
I suggest you look at some comparison on foreign sites type cloudynights

avatarsenior
sent on May 30, 2018 (14:39) | This comment has been automatically translated (show/hide original)

Thanks for the clarifications!!! :-D

avatarjunior
sent on May 31, 2018 (16:57) | This comment has been automatically translated (show/hide original)

Excellent recovery, you managed to completely solve the nucleus, congratulations! Did you do it with a focal reducer?
Hello

avatarsenior
sent on May 31, 2018 (19:40) | This comment has been automatically translated (show/hide original)

Thanks here too Francis!
No is made at full focal 2350mm



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