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About Photography / Hobbyist Member Sylvain GirardMale/France Group :iconphotography-apn: Photography-APN
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The Pleiades in Taurus - Mk II by octane2
by octane2

The Pleiades is a very nice object of winters sky and your image is very nice. It remind me the emotion I feel when I see them throw my...

Bull Elk in Velvet by kkart
by kkart

I can feel like if I was in the mountain just by looking at this photo. This a great shot ! The composition is perfect with the elk on ...

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ZESLY.NET new version !

More beautiful and up-to-date. Here it is : www.zesly.net
M42 - The Great Orion Nebula by ZeSly
M42 - The Great Orion Nebula
The Orion Nebula is the most famous nebula in the sky. It is the Great Princess of Winter Nights. It is easily visible unaided eyes just below, or above if you're in southern hemisphere, the Orion's Belt and can be recognized with a simple binocular. In fact the Orion constellation in its entirety is a large nebula which M42 is just the most luminous part. It is also a star nursery : observation with the Hubble Space Telescope reveal protoplanetary disks inside. It is located at a distance of 1,350 light-years and is estimated to be 24 light years across.

Unlike a novice might think, this is not an easy photographic target. Especially when you want to show everything. That is to say, the trapeze at the very very bright center and all the dust and vaguely ionized gas that surrounds it.

First difficulty: it happens in winters. And recent winters have been mostly rainy. Thank you global warming. Before, we had beautiful sunny days and negative temperature guaranteeing us clear nights. It's been 4 years that I expected to be able to point the FSQ to it. And it does not happen as expected.

To acquire all the extreme dynamics of this part of the sky you have to mix different exposure times. I had done some testing in October and I was surprised to see the trapeze completely burned on 30s exposures. We must come down to 10s and again, it's limit. For the weaker parts, I made 5min exposures, 10min would not be luxury.

Last difficulty: it is low on the horizon that does not leave much time along the night to acquire all the necessary exposures before it is in the turbulence and light pollution. Especially as the sky was diffusing light that night with 20.7 SQM. I've seen better.

I had the idea to make two night from 21 to 23 December last year, but the telescope has been covered by dew the first night and I foolishly forget to turn the heaters on. The second night was much more dry, curiously.

I finally acquired 34 exposures of 5 minutes and 14 
exposures 10 seconds. I wished I have more. It should have been doing 5s, 30s and perhaps poses 10 minutes exposures and then a second night would not have been too much.

For the processing, I can appreciate the power of PixInsight even it is not easy to tame. Several day of "work", I had to made it twice.

34 exposures of 5 minutes and 14 exposure of 10 seconds for the bright heard.
Camera : Canon EOS 1000D unfiltered
Telescope : Takahashi FSQ-106ED refractor.
Mount : Takahashi EM-200 USD3.
Guiding : Orion Starshoot Autoguider on a William Optic Zenithstar 66SD refractor.
Outside temperature : 0°C
Sensor temperature : 7°C
SQM : 20.7
Software : auto-guiding with PHD Guiding, acquisition with Astro Photography Tool, 
processing with PixInsight and a little bit of photoshop.
Location : Col des Milles Martyrs, Isère, France
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NGC 7331 and Stephan's Quintet by ZeSly
NGC 7331 and Stephan's Quintet
NGC 7331 and Stephan's Quintet

Here is the result of the acquisitions of the night Saturday, 10/25 to Sunday, 10/26 passed on the heights of the spine, a small village lost in the Baronies Provençale.

NGC 7331 is the large galaxy on the left. It is a barred spiral located has about 42 million light-years. Its diameter is around 100,000 light years so it must looke quite like the Milky-Way.

Stephan's Quintet is the galaxy cluster on the right. Their are located between 300 and 350 million l.y. but one which is 40 million l.y.

All this is visible in the constellation of Pegasus. If NGC 7331 is relatively accessible by eyes through a telescope, Stephan's Quintet is much more difficult. It need a beautiful sky and a telescope with a large diameter to see him. That night, it was not very bright in a T350.

45 exposures of 5 minutes.
Camera : Canon EOS 1000D unfiltered
Telescope : Takahashi FSQ-106ED refractor.
Mount : Takahashi EM-200.
Guiding : Orion Starshoot Autoguider on a William Optic Zenithstar 66SD refractor.
Outside temperature : 11°C to 6°C
Sensor temperature : 13.5°C
Humidity : 60%
SQM : 21.3
Software : auto-guiding with PHD Guiding, acquisition with 
Astro Photography Tool, processing PixInsight and a little bit of photoshop.
Location : L'Epine, France
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ZeSly
Sylvain Girard
Artist | Hobbyist | Photography
France
I'm amateur landscape photographer and astrophotographer. I leave near Grenoble, in the French Alps.
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:iconindigosummerr:
IndigoSummerr Featured By Owner Feb 8, 2015  Hobbyist Photographer
Thank you! :rose:
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:iconzesly:
ZeSly Featured By Owner Feb 8, 2015  Hobbyist Photographer
Welcome ! :hug:
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:icondianavvolf:
DianaVVolf Featured By Owner Aug 22, 2014  Hobbyist Photographer
I'm glad that you joined to our group! :D

Hello! :D

I'd like to welcome you in :iconphotography-earth:!:heart: :la: I think we're a nice group, with a lot of talented artist and with a great leader team. :meow: I hope you'll enjoy! ^^ Invite your friends if you can! ^^

:huggle:Be nice with the others and submit your best! :aww:

By the way...if you can please donate some :points:...I'd like to holding contests in the group... :heart:
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:iconclochartist-photo:
clochartist-photo Featured By Owner Jun 24, 2014  Hobbyist General Artist
Happy birthday Sylvain :happybounce: Airborne !!! Hope you'll have a great day and many inspiring years to comeNod :D (Big Grin) !
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:iconzesly:
ZeSly Featured By Owner Jun 25, 2014  Hobbyist Photographer
Thanks a lot, Fred. :-)
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:iconthe-dude-l-bug:
The-Dude-L-Bug Featured By Owner Jun 24, 2014  Hobbyist General Artist
:party:   HAPPY Birthaversary!!!  :D   :dance:
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:iconzesly:
ZeSly Featured By Owner Jun 25, 2014  Hobbyist Photographer
Thank you Jim ! :-)
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:iconirrationalrationale:
irrationalrationale Featured By Owner Jun 24, 2014
Happy Birthday
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:iconzesly:
ZeSly Featured By Owner Jun 25, 2014  Hobbyist Photographer
Thank you Heather
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:iconmddahl:
MDDahl Featured By Owner Jun 24, 2014  Hobbyist Photographer
Happy Birthday!!! :cake:
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