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Sun spot group 1024

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#1 Roel

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Posted 04 July 2009 - 06:07 AM

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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#2 CarlosEH

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Posted 04 July 2009 - 07:52 AM

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

#3 frank5817

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Posted 04 July 2009 - 10:17 AM

Roel,

Nice sketches of this sunspot group. Initially I thought I was looking at photos. Very sharp. :waytogo:

Frank :)

#4 Erix

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Posted 04 July 2009 - 10:24 AM

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?

#5 rodelaet

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Posted 04 July 2009 - 01:22 PM

Very nice, Roel!

What kind of filter did you use for your observation, Roel?

#6 rolandlinda3

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Posted 04 July 2009 - 02:29 PM

nice sketching and observing.

#7 Roel

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Posted 04 July 2009 - 02:35 PM

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.

#8 markseibold

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Posted 04 July 2009 - 02:50 PM

Roel

Very nice renderings. :bow: :bow: :bow: 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

#9 rd56

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Posted 04 July 2009 - 11:06 PM

Roel

My first thought when I saw this was what is a photograph doing in the sketching forum? Very nicely done.

Ron

#10 Special Ed

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Posted 05 July 2009 - 11:51 AM

Roel,

Very nice presentation and impressive digital processing. I hope you get another look at this sunspot group--it seems to be sticking around. :cool:

#11 Jeff Young

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Posted 06 July 2009 - 11:41 AM

Excellent sketches!

-- Jeff.






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