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Astrophotography and Sketching >> Sketching

Pages: 1
Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
White light vs H-alpha
      #5448139 - 09/30/12 09:46 AM Attachment (33 downloads)

I always loved the white light vs H-alpha sketches here on CN (like those by Mel). Now that I have my own H-alpha scope I tried for first light to copy the concept.
Sketching a full solar disk ain't no easy. I sketched the bright features with a white pastel pencil but the scanner didn't catch it. And how do you sketch granulation???


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Special Ed
Postmaster
*****

Reged: 05/18/03

Loc: Greenbrier Co., WV 38N, 80W
Re: White light vs H-alpha new [Re: Jef De Wit]
      #5448377 - 09/30/12 12:33 PM

Nice work, Jef and congratulations on your H-alpha scope. Great detail with the proms and filament.

The granulation in H-alpha is hard to render--I don't know if anyone is truly satified with their attempts up to now. I know I'm not.


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Ibmelrod
sage


Reged: 10/18/04

Loc: Ontario Canada
Re: White light vs H-alpha new [Re: Special Ed]
      #5448901 - 09/30/12 06:00 PM

Jef,

Congratulations too for your new H-a scope. It opens an entire new and dynamic astro time slot.

I find granulation impossible with my equipment and skill level so ignore it. That's the sketcher's choice.


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frank5817
Postmaster
*****

Reged: 06/13/06

Loc: Illinois
Re: White light vs H-alpha new [Re: Ibmelrod]
      #5449256 - 09/30/12 09:45 PM

Jef,

That was a good move to get yourself a H- alpha scope.
I can't wait for round the clock sketching from you.
The two above are wonderful.

Frank


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: White light vs H-alpha new [Re: frank5817]
      #5449609 - 10/01/12 04:24 AM

Michael, Mel & Frank: thanks!
Just a pity that I decided to by a H-a scope after summer. The sun gets lower and lower every day But this means: longer darker nights


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Uwe Pilz
scholastic sledgehammer


Reged: 05/16/08

Loc: Leipzig, Germany
Re: White light vs H-alpha new [Re: Jef De Wit]
      #5449649 - 10/01/12 06:07 AM

Such comparisions are always valuable. Thank you for sharing.

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Andrev
Post Laureate
*****

Reged: 02/08/11

Loc: Montreal, Quebec, Canada
Re: White light vs H-alpha new [Re: Uwe Pilz]
      #5449683 - 10/01/12 06:47 AM

Jef.

Really lovely sketches. You seem having caught very nice details and I like your surface rendition. Tell me. I imagine your original drawing are bigger than what you are showing us. I would like to see a bigger image to really enjoy more your sketches.

You are right, its sad you got your scope when summer is ended. But at least you got it before the end of high sun's activity. Congratulation.

Andre.

Edited by Andrev (10/03/12 07:27 PM)


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niteskystargazer
Carpal Tunnel
*****

Reged: 10/05/09

Loc: 41-43'-28" N 87-42'-39" W
Re: White light vs H-alpha new [Re: Jef De Wit]
      #5450111 - 10/01/12 01:01 PM

Jef,

Nice sketch of the Sun .

CS,KLU,

,

Tom


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: White light vs H-alpha new [Re: Andrev]
      #5450243 - 10/01/12 02:29 PM Attachment (23 downloads)

Quote:

I would like to see a bigger image to really enjoy more your sketches.



The original circle is 10,5 cm (= the dustcap of my refractor).

Edited by Jef De Wit (10/01/12 02:55 PM)


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Ibmelrod
sage


Reged: 10/18/04

Loc: Ontario Canada
Re: White light vs H-alpha new [Re: Jef De Wit]
      #5450514 - 10/01/12 05:24 PM

Love the enlarged view! Great Stuff Jef.

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magnus
professor emeritus


Reged: 03/17/04

Loc: Visby, Sweden
Re: White light vs H-alpha new [Re: Ibmelrod]
      #5450692 - 10/01/12 07:30 PM

Awesome sketch,Jef. I also have the LS35Ha and it never stops surprise me how many Ha details I can observe with the tiny 35mm aperture.
/Magnus 57 N.


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: White light vs H-alpha new [Re: magnus]
      #5451681 - 10/02/12 10:52 AM

I hope to see a lot of sunsketches from you too!

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nunciusaustralis
sage


Reged: 09/25/09

Loc: Rio de janeiro, Brazil
Re: White light vs H-alpha new [Re: Jef De Wit]
      #5452120 - 10/02/12 03:06 PM

Reaqlly nice . H-a is pretty impressing. And very realistic. Made find my baader filter that was lost on the closet. Thnks for sharing.

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JeanB
Pooh-Bah


Reged: 07/11/11

Loc: Montreal, Canada
Re: White light vs H-alpha new [Re: nunciusaustralis]
      #5452745 - 10/02/12 10:05 PM

I really like your sun sketches, Jef! H-a requires good observation skills. You proved to have what it takes!

Hope to see more of your sketches.

Jean


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: White light vs H-alpha new [Re: JeanB]
      #5453054 - 10/03/12 04:10 AM

Nuncius & Jean: thanks! I looked at an image in white-light and H-alpha and most of the features (but not all) are right on spot

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Andrev
Post Laureate
*****

Reged: 02/08/11

Loc: Montreal, Quebec, Canada
Re: White light vs H-alpha new [Re: Jef De Wit]
      #5454039 - 10/03/12 07:27 PM

Jef.

Oh, now you impress me. What a beautiful sketch. Very nice details and texture. Next time, post this size as it render much better your very nice work.

Andre.


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