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ST80 as a solar viewing instrument

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#1 James Paulson

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Posted 25 September 2018 - 07:04 AM

Is there a safe way that I can convert an ST80 into a solar viewing scope? Is a Herschell wedge all that is required?



#2 SchoolMaster

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Posted 25 September 2018 - 07:13 AM

Do you mean for white-light viewing of transits and sun spots only, or something else?

 

Obvious question I know, but just checking, because I noticed that there was no mention of a filter.  I have been testing using the solar filter from my 90mm Skywatcher Mak on a ST80 for this purpose, so I can see if it will work for school, or whether I need to build a solar cone projector.

 

Wedges are expensive, filters are cheap.  You also mention viewing.  Do you also intend more detailed recording or observation?


Edited by SchoolMaster, 25 September 2018 - 08:14 AM.


#3 sickfish

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Posted 25 September 2018 - 07:45 AM

I made a filter for mine using Baader film and a pvc pipe.

The size of the pvc pipe fits snug over the dew shield.

This does not convert the scope to a sun only instrument.



#4 MalVeauX

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Posted 25 September 2018 - 09:05 AM



Is there a safe way that I can convert an ST80 into a solar viewing scope? Is a Herschell wedge all that is required?

Heya,

 

I use an ST80 for all things solar, from white light to hydrogen alpha to calcium k, etc. It's great for it.

 

If you want to view the sun in white light, a Herschel Wedge will do it, but so will a simple bit of Baader Solar Film (much cheaper; you can get it in a premade cell for probably $50 from Astrozap). And if you want to turn it into a hydrogen alpha solar scope, you can do it with a Quark Chromosphere too.


Here's the stock ST80 with a Astrozap pre-made cell with Baader Solar Film:

 

32179648556_bec71d2da4_c.jpg

 

Here's the ST80 with a 2" focuser upgrade and a Quark Chromosphere (to go narrowband into hydrogen alpha):

 

32689712996_f1a20ac427_c.jpg

 

39557553344_1206da721c_c.jpg

 

And to put it on the sun fast, I just rubber-banded a Sol Searcher on there as needed. You can also use a Dynapod Helio-Pod (cheaper and made to do just this too).

 

39557555334_9b05acd7fa_c.jpg

 

Very best,


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#5 Don W

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Posted 25 September 2018 - 10:27 AM

I have one set up with Baader film in a homemade cell, and another one with a projection screen, funnel thingy. That's a technical term. LOL

 

IMG_0676.JPG

 

IMG_0677.JPG

 

IMG_0678.JPG

 

 

 


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#6 44ye

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Posted 25 September 2018 - 01:41 PM

These are for white light ie Sun Spots ( has not been one in weeksfrown.gif  )

Major cost of Sun Funnel is EYEPIECE and the Screen material

Sun Funnel pictured above link

https://eclipse2017....n_Funnel_v4.pdf

 

Last ( but not the least ) for outreach GO BIG OR GO HOME lol.gif

SUN GUN link

http://www.sunguntel...e.com/MAIN.html

 

44ye 

Don


Edited by 44ye, 25 September 2018 - 01:48 PM.

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#7 44ye

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Posted 25 September 2018 - 01:57 PM

Don W

 What eyepiece are you using ?  My projection is not nearly as big its about 1/3 that size .

Thanks

44ye

Don



#8 Don W

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Posted 25 September 2018 - 03:22 PM

I think it's a Meade 9mm MA.


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#9 James Paulson

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Posted 13 October 2018 - 09:23 AM

For those using the ST80 for solar, what do you think of it overall? What white light filter do you recommend? Are there false color images present?



#10 Don W

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Posted 13 October 2018 - 10:53 AM

No false color that I can see. An achromat works fine for solar viewing. I would suggest either making your own cell using Baader film or buying a filter with Baader film. I like my sun funnel. Works great for group viewing.


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#11 James Paulson

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Posted 15 October 2018 - 06:59 AM

No false color that I can see. An achromat works fine for solar viewing. I would suggest either making your own cell using Baader film or buying a filter with Baader film. I like my sun funnel. Works great for group viewing.

 

I was looking at the one that Orion sells and I think that is the way I will go. I should have one instrument suitable for solar viewing, and it seems nice and lightweight, good for those quick daytime views, and quite honestly I am not using it for anything else.




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