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Main
Date: 21 May 2007 16:34:24
From: Dave Jessie
Subject: Sun in H-a
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Gang,
I had a great three hours of solar viewing yesterday with the PST I got two
and a half years ago. Absolutely fabulous views, both Cyclops and
binoviewer mode.
Now, all that did was make me want a double-stacked 90 even more than I did
before, but I can't possibly afford the more-than-twelve grand to purchase
one. Anybody have one they'd be willing to give me? :^)
Clear Dark Steady Skies (and we've already had more of these this year than
all of last year!)
Dave Jessie
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Date: 22 May 2007 00:00:43
From: Anthony Ayiomamitis
Subject: Re: Sun in H-a
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Dave Jessie wrote:
> Gang,
>
> I had a great three hours of solar viewing yesterday with the PST I got two
> and a half years ago. Absolutely fabulous views, both Cyclops and
> binoviewer mode.
>
> Now, all that did was make me want a double-stacked 90 even more than I did
> before, but I can't possibly afford the more-than-twelve grand to purchase
> one. Anybody have one they'd be willing to give me? :^)
<HINT > PST modification with large aperture ERF </HINT>
>
> Clear Dark Steady Skies (and we've already had more of these this year than
> all of last year!)
Anthony.
> Dave Jessie
>
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Date: 21 May 2007 18:23:30
From: lal_truckee
Subject: Re: Sun in H-a
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Anthony Ayiomamitis wrote:
> Dave Jessie wrote:
CLIP
>> I can't possibly afford the more-than-twelve grand
>> to purchase one. Anybody have one they'd be willing to give me? :^)
>
> <HINT> PST modification with large aperture ERF </HINT>
Does this work well? Safely?
It appears that it should, if the focal length is long enough. Has
anyone reading built a large aperture H-a instrument using this
approach? Care to comment?
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Date: 22 May 2007 14:49:47
From: Anthony Ayiomamitis
Subject: Re: Sun in H-a
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lal_truckee wrote:
> Anthony Ayiomamitis wrote:
>
>> Dave Jessie wrote:
>
> CLIP
> >> I can't possibly afford the more-than-twelve grand
>
>>> to purchase one. Anybody have one they'd be willing to give me? :^)
>>
>>
>> <HINT> PST modification with large aperture ERF </HINT>
>
Hi there,
>
> Does this work well? Safely?
> It appears that it should, if the focal length is long enough. Has
> anyone reading built a large aperture H-a instrument using this
> approach? Care to comment?
I am in the process of going down this path. I just received a Daystar
130mm ERF and which I will be mounting on my AP160. I was hoping to be
able to do something with my Coronado SM60/BF10 at the focuser end but
we have the central obstruction of the SM60. As a result, I will also
have to pursue a PST and which I will disassemble and proceed accordingly.
Here is something to wet your apetite:
http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Board/solar/Number/1150736/page/1/view/collapsed/sb/5/o/o/fpart/all
Anthony.
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