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  1. Galleries
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  3. Astrophotography
  4. » Andromeda Galaxy - 06/11/2013

 
Andromeda Galaxy - 06/11/2013...

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Andromeda Galaxy - 06/11/2013 sent on November 07, 2013 (17:47) by Deneb. 9 comments, 584 views.

at 105mm, 5 sec f/4.0, ISO 3200, tripod.




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avatarsenior
sent on November 07, 2013 (19:27) | This comment has been automatically translated (show/hide original)

Hello Deneb, 5 "are really Pochini even at ISO 3200, with a 105 mm f / 4 is a miracle that you have taken M31 ... I see that you had to crop a lot and this has worsened everything .... I wonder what you would have gotten a 1600 tracker and some exposure to 30/40 "8-) Hello!!

avatarjunior
sent on November 08, 2013 (9:19) | This comment has been automatically translated (show/hide original)

I agree with Beppe!

user15434
avatar
sent on November 08, 2013 (12:03) | This comment has been automatically translated (show/hide original)

Hello Deneb,
maybe it is not a matter of ISO ... by chance you took to JPEG? Have you applied some filters to reduce noise?
If I may make a suggestion I suggest the following procedure:
- Takes a number of photos in RAW M31 with 105mm f / 4. Unfortunately, 5'' is the maximum time that you can expose to 105mm in order not to get star moves on a fixed tripod. For calcolarti times you can use my little program Virgo ([URL =] www.astrotrezzi.it/?p=3438 ). For use ISO 3200 or even 6400 if you can.
- Sum pictures with software like IRIS or DSS. In this way the noise caused by high ISO images will disappear and you will get soft with a good S / N ratio
- Processing with Photoshop (or similar) gently applying filters to reduce noise and playing a lot with the 'histogram (curves). If you want a hand then ask away!
Hope that helps,
David

avatarjunior
sent on November 08, 2013 (12:12) | This comment has been automatically translated (show/hide original)

Beppe You're right, but I did what I can, not having the right equipment for tracking and a decent magnification.
In the original shot (cm ² in JPG and not RAW) the particular is very small, so I chose to shoot with a very low time to keep the point-like background stars, and then crop the image and work it with Lr, but lost so quality than the original one that takes a very wide field.
You should also know that the shooting was accidental and almost a gamble, because I was working on other things, but I could not resist to try Andromeda with a sky so clear as it unfortunately does not happen often in my part. :)

avatarjunior
sent on November 08, 2013 (12:27) | This comment has been automatically translated (show/hide original)

Thanks David, as the software for the stacking and the dark I have a MAC so I can not use IRIS, while DSS do not know him, but I can inform you.
As for your advice I find them invaluable, because in fact it is little I began to photograph the sky with my Canon.
Being very un'astrofila practitioner, usually I look at the sky with my telescope 300 DOBSON, but does not allow the connection with bodies from recovery? occasionally I engage an observatory for shooting with CCD, but I'd like to be independent, but requires a lot of resources.
Hello and thank you!

user15434
avatar
sent on November 08, 2013 (12:45) | This comment has been automatically translated (show/hide original)

Hello Deneb,
for mac is PixInsight ([URL =] pixinsight.com/ ), very powerful but unfortunately :-( payment. I have tried using IRIS under Linux thanks to Wine ([URL =] www.winehq.org/ ). Perhaps there is also a version for OSX. (DSS [URL =] deepskystacker.free.fr/english/index.html [/ URL ] ) is free but I think speed under Windows only :-(.
So you're a visualist ... excellent! I spent most of my "astronomical life" by visualist and is a sight. Still photographer while observing the sky with binoculars and telescopes (two telescopes are too many to bring in the car:-D). A Dobson 30 cm is a show, I've built one in the past! Two nights ago a friend of mine with that instrument and the sky of Sormano (CO) has orsservato globular clusters of M31: legendary!.
However, you can already do a little something with the Dobson ... for example look at this picture that I made in 2007 to the Moon and Saturn with a Dobson of 30 cm and a compact room [URL =] www.astrotrezzi.it/?p=1091 .
However, do not give up ... I think that I decided to move from the visual world all'astrofotografico (passing through the astrodisegni) just to make "memory shots" to the objects observed at the eyepiece ;-).
Greetings and see you soon,
David

avatarsenior
sent on November 08, 2013 (17:54) | This comment has been automatically translated (show/hide original)

Perhaps the biggest flaw of this photo is just the excessive crop, which ends up to emphasize all the other problems. If you only have a fixed tripod and you want to get close all'astrofotografia you can start with very short focal lengths and take beautiful panorama of the sky: they are photos that already give some satisfaction without having to integrate multiple poses (if you work under dark skies even better) and do not require long exposure. You can try your hand at the startrails, the more you have the Dobsonian and you can while away the time waiting for the camera alone grind its hundreds of poses!

hello!

Chiara

avatarjunior
sent on November 10, 2013 (12:10) | This comment has been automatically translated (show/hide original)

Congratulations for the initiative, with these focal lengths you just a astroinseguitore or tablet Equatorial :-)
www.cristianfattinnanzi.it/index.php?option=com_content&view=artic

good luck and welcome ;-)

avatarjunior
sent on January 11, 2014 (14:16) | This comment has been automatically translated (show/hide original)

Thank you all <3


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