Roel
sage
Reged: 04/22/07
Loc: Deventer, The Netherlands
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Sun spot group 1024
#3198137 - 07/04/09 07:07 AM Attachment (60 downloads)
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Today a new sun spot group appeared! And a nice one too, so I took my Polarex 3" outside for a sketch. A lot of detail was visible! The image is a composite of two pencil sketches on white paper. The one at the top right is made through a 12,5mm Ortho, the one at the lower left through a 6mm Ortho.
The sketch is digitally altered in Photoshop (gradient, color, orientation, contrast). I dit no further altering in the spots themselves.
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CarlosEH
Postmaster
Reged: 01/19/05
Loc: Pembroke Pines, Broward County...
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Re: Sun spot group 1024
[Re: Roel]
#3198227 - 07/04/09 08:52 AM
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Roel,
An outstanding observation/rendering of an interesting sunspot group. Your renderings appear as photographs of the Sun and sunspot group. Thank you for sharing it with us all.
Carlos
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frank5817
Postmaster
Reged: 06/13/06
Loc: Illinois
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Re: Sun spot group 1024
[Re: CarlosEH]
#3198457 - 07/04/09 11:17 AM
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Roel,
Nice sketches of this sunspot group. Initially I thought I was looking at photos. Very sharp. 
Frank 
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Erix
Toad Lily
Reged: 12/25/04
Loc: Texas, USA
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Re: Sun spot group 1024
[Re: frank5817]
#3198471 - 07/04/09 11:24 AM
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Truly one up to par with the best white light sketches I've seen. Wonderfully rendered! What would the magnification be with your scope using the 6mm EP?
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rodelaet
Post Laureate
Reged: 04/28/06
Loc: 50°56' N - 4°58' E (Belgium)
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Re: Sun spot group 1024
[Re: Roel]
#3198812 - 07/04/09 02:22 PM
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Very nice, Roel!
What kind of filter did you use for your observation, Roel?
Edited by rodelaet (07/04/09 02:23 PM)
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rolandlinda3
Post Laureate
Reged: 01/24/06
Loc: Crozet VA 22932
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Re: Sun spot group 1024
[Re: rodelaet]
#3198917 - 07/04/09 03:29 PM
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nice sketching and observing.
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Roel
sage
Reged: 04/22/07
Loc: Deventer, The Netherlands
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Re: Sun spot group 1024
[Re: rolandlinda3]
#3198923 - 07/04/09 03:35 PM
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Thanks all!
@Erix: The magnification with a 6mm eyepieces is 200x.
@Rodelaet: I used a Baader Astrosolar filter. The yellowish colour in the sketch is purely for nice looks. In reality the image of the sun is white.
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markseibold
Carpal Tunnel
Reged: 01/19/08
Loc: Portland Oregon
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Re: Sun spot group 1024
[Re: Roel]
#3198945 - 07/04/09 03:50 PM
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Roel
Very nice renderings.  I'll have to take a look through my Thousand Oaks glass white light filter and possibly the h-alpha too.
As Frank said, I too thought these images were photographs. Unusual that there seems to be no penumbra surroundng the unmbras.
Thnks for posting and the heads up!
Mark
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rd56
sage
Reged: 12/17/06
Loc: Central New Jersey
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Re: Sun spot group 1024
[Re: markseibold]
#3199634 - 07/05/09 12:06 AM
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Roel
My first thought when I saw this was what is a photograph doing in the sketching forum? Very nicely done.
Ron
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Special Ed
Postmaster
Reged: 05/18/03
Loc: Greenbrier Co., WV 38N, 80W
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Re: Sun spot group 1024
[Re: rd56]
#3200312 - 07/05/09 12:51 PM
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Roel,
Very nice presentation and impressive digital processing. I hope you get another look at this sunspot group--it seems to be sticking around. 
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Jeff Young
Post Laureate
Reged: 08/04/05
Loc: Ireland
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Re: Sun spot group 1024
[Re: Special Ed]
#3202070 - 07/06/09 12:41 PM
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Excellent sketches!
-- Jeff.
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