ok guys need some help

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Re: ok guys need some help

Post by highfnum » Sat Jun 20, 2015 12:04 am

sunspot group upper right prom lower left

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swisswalter
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Re: ok guys need some help

Post by swisswalter » Sat Jun 20, 2015 4:57 am

Hi John

that is a good progress
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 :)

from 7 am - 7 pm http://www.nanosys.ch

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Re: ok guys need some help

Post by highfnum » Sat Jun 20, 2015 7:40 am

Yes I have some hope

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Re: ok guys need some help

Post by highfnum » Sat Jun 20, 2015 9:17 am

i locked down unit on rail to keep stable
latest.jpg
latest.jpg (183.73 KiB) Viewed 1335 times

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Merlin66
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Re: ok guys need some help

Post by Merlin66 » Sat Jun 20, 2015 9:27 am

Well done!
A bit more practise and you'll be kicking goals.....
Stick with the narrow slit gap...
Get the exposure to give you a deep absorption line, keep checking your focus and play around with the extraction of various bandwidths (# of pixels) from the spectral image.
You may also have to throw a light proof cover over the SHG to reduce unwanted reflections etc.
Onwards and Upwards.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

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Re: ok guys need some help

Post by highfnum » Sat Jun 20, 2015 10:20 am

Merlin 66
What about cleaning glass disk?

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Re: ok guys need some help

Post by Merlin66 » Sat Jun 20, 2015 10:33 am

Sure, it can be cleaned with alcohol/water mix....
The scan lines won't be coming from the slit gap - usually dust etc. will show as continuous "transversalium" lines across the image...
Hmmm
Question: in the presented image the scan seems to be across (horizontally) - is this correct?
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

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Re: ok guys need some help

Post by highfnum » Sat Jun 20, 2015 12:21 pm

Ok I cleaned it there was a haze on it
not sure I understand Question

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Re: ok guys need some help

Post by Merlin66 » Sat Jun 20, 2015 12:25 pm

It's OK....
The vertical lines in your image are not caused by dust...
They come from somewhere in the processing..
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

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