Can i use my EDGEHD800 for Ha?

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Taipan
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Can i use my EDGEHD800 for Ha?

Post by Taipan » Wed Apr 25, 2018 5:58 pm

Just curious. Is there a way to fit a etalon and blockfilter to my Celestron EdgeHD800 SCT?
I use a Lunt LS50 for full disks but sometimes i want to get a closeup of a prom. Would be cool if i could use my bigger scope for that...
/Mattias
Lunt LS50THa/B600PT SS. ZWO ASI 120MM-S. Skywatcher Esprit 80ED with homemade Baader solarfilm filter and solarcontinuum filter.

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marktownley
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Re: Can i use my EDGEHD800 for Ha?

Post by marktownley » Wed Apr 25, 2018 7:52 pm

Yes, you just need a suitable ERF. I use mine

Imageimage by Mark Townley, on Flickr

Airylab HaT...
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

Taipan
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Re: Can i use my EDGEHD800 for Ha?

Post by Taipan » Wed Apr 25, 2018 8:52 pm

ERF?
Lunt LS50THa/B600PT SS. ZWO ASI 120MM-S. Skywatcher Esprit 80ED with homemade Baader solarfilm filter and solarcontinuum filter.

bart1805
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Re: Can i use my EDGEHD800 for Ha?

Post by bart1805 » Wed Apr 25, 2018 9:05 pm

Mark uses a special Edge HD: https://airylab.com/hat-solar-telescopes/
You need this erf: https://www.baader-planetarium.com/en/s ... 80mm).html
Or ask Valery on this forum.

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Re: Can i use my EDGEHD800 for Ha?

Post by christian viladrich » Thu Apr 26, 2018 10:03 am

The answer is a big yes:-)

Here is an exemple of image taken in Ha with my C8 Edge-HD:
Image
Image

See slide 24 for a picture of the scope :
http://astrosurf.com/viladrich/astro/in ... eil-HR.pdf
Christian Viladrich
Co-author of "Astronomie Planétaire"
http://www.astroplanetes.com/

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marktownley
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Re: Can i use my EDGEHD800 for Ha?

Post by marktownley » Thu Apr 26, 2018 11:07 am

Interesting PDF!
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Valery
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Re: Can i use my EDGEHD800 for Ha?

Post by Valery » Thu Apr 26, 2018 6:21 pm

Taipan wrote:
Wed Apr 25, 2018 8:52 pm
ERF?
We can make for you a 214mm DERF filter which will allow you to use your C8 telescope as a regular telescope for night observing. Just put in in the front of the telescope and observe the Sun. Remove it and then observe what ever you like. And this will be the most cost effective solution.

Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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Re: Can i use my EDGEHD800 for Ha?

Post by AndiesHandyHandies » Mon Apr 30, 2018 8:47 pm

Hi

Does the Cassegrain affect the acceptance angle? And how do you calculate the effect? Primary F2 say and secondary magnification F5 to give net F10.
Do you use a standard telecentric barlow to reach F30 or a special one to correct the acceptance angle reduction?

Can you use a PST directly on the focusser? Solving the 200mm backfocus issue by moving the secondary in say.
Or again would you need to correct the accepance angle reduction?

Andrew.

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