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May 20, 2013 Chromospheres

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#1 BYoesle

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Posted 20 May 2013 - 09:44 PM

Thought these made for an interesting comparison - thanks for looking.

The 21:00 UTC H alpha chromosphere at 0.7 Angstrom FWHM (single SM90):

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#2 BYoesle

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Posted 20 May 2013 - 09:45 PM

The 21:06 UTC H alpha chromosphere at 0.45 Angstrom FWHM (double stack SM90/90):

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#3 BYoesle

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Posted 20 May 2013 - 09:46 PM

The 21:17 UTC CaK chromosphere at 2.2 Angstroms FWHM:

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#4 jpb30

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Posted 21 May 2013 - 01:18 AM

Nice series Bob :)

JP

#5 Andy Devey

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Posted 21 May 2013 - 03:39 AM

Excellent shots and comparison Bob

Regards

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#6 steveward53

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Posted 21 May 2013 - 03:54 AM

Great work Bob ,

I had a serious look into Ha kit at the I.A.S. at the weekend , decided that the way to go will be with on of Ken Huggetts' masterpieces rather than a mass produced one.

It's gonna be a long while until the pot is full though so don't hold your breath ...

#7 R Botero

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Posted 21 May 2013 - 07:14 AM

Great comparison Bob. WL and CaK seem very active - much more so than in the recent months as expected - and make interesting observing versus the traditional "wow effect" of hydrogen alpha filters. I like your DS Ha image a lot but there's so much happening on the CaK one as well! :cool:

#8 Andrev

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Posted 21 May 2013 - 09:01 AM

Bob.

Would you imagine if I would be able to double stack my LS152 !! My sketches would be twice longer to do. Beautiful comparison, thanks for sharing.

Andre.

#9 steveward53

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Posted 21 May 2013 - 09:33 AM

You'd just need a sharper pencil Andre ... :lol:

#10 raylal

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Posted 21 May 2013 - 10:34 AM

Very impressive Bob, great comparison.

Ray

#11 BYoesle

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Posted 21 May 2013 - 10:41 AM

Thanks very much everyone!

Would you imagine if I would be able to double stack my LS152 !!


Andre, you can DS your 152: check the Lunt web site for Edge Spec, under Optical Coatings, where there is listed a LOS-150-AE-075-656.28 -- a 150 mm H alpha < 0.75 A filter - "POR" > price on request...

#12 Andrev

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Posted 21 May 2013 - 11:38 AM

Bob.

Really !!! I didn't know that. Surely the price must be astronomical... Thanks for the info. So be prepared for the never seen before ULTRA detailed sun sketches...

No, its a joke... I'm sure the price is not really affortable. I'll check for fun.

Andre.

#13 Andrev

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Posted 21 May 2013 - 11:41 AM

Steve.

You are right. I'm using a 0.5mm pencil for my full disk sketch and its really hard to do very very fine details like on Bob's picture. I would need a 0.3mm pencil but they don't exist in orange color.

When doing close up sketches, I use a different type of pencil and I can do finer details because proms are bigger.

Andre.

#14 JeanB

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Posted 21 May 2013 - 01:15 PM

Bob,

you did a terrific job on these. I like the comparison between the shots.

Jean

#15 Solar B

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Posted 21 May 2013 - 01:17 PM

Great Bob :cool: ultra sharp with great detail on all images.
DS is always best though.
Brian

#16 Andrev

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Posted 21 May 2013 - 04:46 PM

Bob.

Just can't find anything on Lunt webpage.

Andre.

#17 BYoesle

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Posted 21 May 2013 - 08:04 PM

On the left hand side of the Lunt Solar page there is the Edge Spec link to the site "A Divison of Lunt Solar Systems LLC Commercial Optics" with a Lunt cactus logo, which if you follow it will eventually get you here, where the ES etalons are listed:

http://www.edgespec.com/oc.html

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#18 Andrev

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Posted 21 May 2013 - 09:19 PM

Bob

Oh boy, I totally missed this annoncement. I ne er thought looking elsewhere than the product catalog. Sorry and thanks for the link.

Andre

#19 BYoesle

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Posted 22 May 2013 - 02:24 AM

Thanks Jean and Solar B ;)

No problemo at all Andre, keep us posted on your findings.


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