:whistle:
To be continued...
Sneak preview...
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marktownley
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Re: Sneak preview...
You tease! 
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swisswalter
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Re: Sneak preview...
Hi Roel
looks great, but what's inside? A PST etalon ?
looks great, but what's inside? A PST etalon ?
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE 
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from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
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DSobserver
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Merlin66
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Re: Sneak preview...
It's got to be a PST etalon with a tuning lever added to allow tuning from the outside of the OTA. Probably mounted onto the front SCT threads of the focuser....
Is that correct, Roel?
(I had a similar arrangement on a El Cheapo 90mm mod....)
Is that correct, Roel?
(I had a similar arrangement on a El Cheapo 90mm mod....)
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
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https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
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Roel
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Merlin66
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Re: Sneak preview...
Roel,
excellent solution! Definately looks like a fully finished professional instrument.
Well done!!
excellent solution! Definately looks like a fully finished professional instrument.
Well done!!
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
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marktownley
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Re: Sneak preview...
Fantastic solution! The acrylic cells for the etalon that allow it to sit in the ota are a great idea! 
:
: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!