Re: [ATM] Advice on Solar scopes/observation

["tony gondola" <acgna@comcast.net>]

That's ok for quick and dirty, low power viewing. It is a very safe solution 
which is a big concern for "sidewalk" situations. The problem is you're 
using a very low quality optical window. If you try to push the quality of 
the image with something like this the need for an optical quality window 
becomes paramount. That suddenly makes the project much more difficult and 
expensive.

I wonder, has anyone tried the Baader "diffraction limited" solar film 
material sold by Astro Physics?

http://www.astro-physics.com/index.htm?products/accessories/solar_acc/astrosolar

Tony

----- Original Message ----- 
From: "Richard Ozer" <rozer@pacbell.net>
To: "ATM" <atm@atmlist.net>
Sent: Saturday, June 17, 2006 6:43 AM
Subject: Re: [ATM] Advice on Solar scopes/observation


> Ulhas is correct if you are not interested in white light observing.
> However, if white light is what you're after, a very good ATM project is a
> Dobson Firefly Sunscope...
>
> http://members.aol.com/sfsidewalk/sunscope.htm
>
> You can easily get away with a 4" aperture.  No point having 6" for the 
> sun.
> It's not like you need to collect more light.
>
> If you want to look at solar flares, then what you need to be building is 
> an
> H-Alpha filter... An H-Alpha filter is not an easy project.  Building one
> that works can turn into a lifetime endeavor...  However, if you are very
> skilled in precision slicing of Calcite crystals, you may be able to pull 
> it
> off.  Anthony should chime in on this one though... he's actually tried
> it...
>
> RO
>
>
> ----- Original Message ----- 
> From: "Ulhas Deshpande" <ulhas_ngp@sancharnet.in>
> To: "ATM" <atm@atmlist.net>
> Sent: Saturday, June 17, 2006 5:50 AM
> Subject: [ATM] Advice on Solar scopes/observation
>
>
>> Paul wrote
>>>>
>>
>> I'm looking for somebody who's feeling helpful and preferably who has
>> experience building a scope with the specific intention of observing the
>> sun, or modifying existing equipment for solar observation. I'm hoping to
>> build a 6" with a dedicated purpose and there seem to be a few options
>> available.
>>
>> <<
>>
>> Unless your main interest is solar observation in white light why not
>> build a SpectroHelioScope (SHS). You can then see the Sun in different
>> wavelengths.go to www.spectrohelioscope.net or join the Spectrohelioscope
>> group on Yahoo for more.
>>
>> Best of Luck
>> Ulhas
>> _______________________________________________
>> ATM mailing list http://www.atmlist.net/
>>
>
>
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