first test shot solex and AT115 apo
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first test shot solex and AT115 apo
this is my largest scope with this SHG
so far
805mm FL
some high clouds
so far
805mm FL
some high clouds
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Re: first test shot solex and AT115 apo
Superb images.
Why do I not get that quality?
Why do I not get that quality?
regards Rainer
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
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Re: first test shot solex and AT115 apo
regards Rainer
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
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Re: first test shot solex and AT115 apo
Hi,
I just made a test looking at 0 order and defocusing the telescope and the slit shape did not change. The camera is focused on the slit.
Below some images of my slit and you can see the shape does not change. The slit width is ~4pixels in the image. The camera ASI 178MM has a pixel size of 2.4µm. So my slit image is about 4.8µm. The slit is a 10µm slit.
Telescope focus set at 9880 steps
Telscope focus set at 14880 steps
Slit resized 3200%
I just made a test looking at 0 order and defocusing the telescope and the slit shape did not change. The camera is focused on the slit.
Below some images of my slit and you can see the shape does not change. The slit width is ~4pixels in the image. The camera ASI 178MM has a pixel size of 2.4µm. So my slit image is about 4.8µm. The slit is a 10µm slit.
Telescope focus set at 9880 steps
Telscope focus set at 14880 steps
Slit resized 3200%
regards Rainer
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
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Re: first test shot solex and AT115 apo
Hi,
I just made some other tests
Original image size and then resized to the same size as yours.
Top your image, middle and bottom (applied some sharpening in PS CS) my image.
Comparison
I just made some other tests
Original image size and then resized to the same size as yours.
Top your image, middle and bottom (applied some sharpening in PS CS) my image.
Comparison
regards Rainer
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
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Re: first test shot solex and AT115 apo
your slit focus image looks better than mine!
your images show same items just slightly out of focus
do you make sure edge of sun beam is razor sharp?
before you take sequence?
what is imaging scope
what is objective scope?
your images show same items just slightly out of focus
do you make sure edge of sun beam is razor sharp?
before you take sequence?
what is imaging scope
what is objective scope?
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Re: first test shot solex and AT115 apo
1. Thank you
3. Yes, as good as possible. I think I need to work on that.
4. 60mm f/6 stopped down to f/10 Astromania finder scope
¿objective scope?
The optical is original Shelyak for Sol'Ex and Star'Ex version
BTW. I can not scan at 16X so I scan at 1x with 14 frames per second. That is the only way I get round Sun's.
Where are you located?
Rainer
regards Rainer
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
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Re: first test shot solex and AT115 apo
Rainer,
Your zero order testing.
This will not show any impact of the telescope out of focus on your SHG.
The slit is being flooded by the solar image independent of the telescope focus.
It does show that your collimator is close to focus position.
Your zero order testing.
This will not show any impact of the telescope out of focus on your SHG.
The slit is being flooded by the solar image independent of the telescope focus.
It does show that your collimator is close to focus position.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
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Re: first test shot solex and AT115 apo
The lovely Hudson valley area upstate NY
what software are you using to build image?
I am using asi178mm camera.
what software are you using to build image?
I am using asi178mm camera.
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Re: first test shot solex and AT115 apo
hello,
just WOAW!! that is really some great results!!! That motivates me to try too
very nice!!
just WOAW!! that is really some great results!!! That motivates me to try too
very nice!!
spectro-coronographe ,Bresser 127/1200 ; Bresser 102/1350 , ASI 178MM
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Re: first test shot solex and AT115 apo
Hi Ken,
So my slit is not yet well focused ?
regards Rainer
Observatorio Real de 14
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North 22° West 101°
Observatorio Real de 14
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Re: first test shot solex and AT115 apo
Rainer,
Looks more like the telescope focus is a little off rather than the collimator.
Try to get a tighter edge on the top/bottom of the spectral image.
Looks more like the telescope focus is a little off rather than the collimator.
Try to get a tighter edge on the top/bottom of the spectral image.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
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"Imaging Sunlight - using a digital spectroheliograph" - Springer
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"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
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Re: first test shot solex and AT115 apo
" ... tighter edge ... "
Do you mean the to make the ROI smaller ? I am already at a Roi between 2000 x 90 and 2000 x 60 ...
... or concentrate on the left and right edge ?
I focus the camera on small horizontal lines and then I focus the scope as good as possible.
I think I will get a 70mm diameter and 400 mm focal length scope.
Rainer
regards Rainer
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Observatorio Real de 14
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Re: first test shot solex and AT115 apo
Rainer,
Start with the focus of left and right edge then any vertical lines and finally the wiggles in and on the absorption line.
Ken
Start with the focus of left and right edge then any vertical lines and finally the wiggles in and on the absorption line.
Ken
"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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Re: first test shot solex and AT115 apo
I would NOT do that before you get the results you are after. Work on your focus.I think I will get a 70mm diameter and 400 mm focal length scope.
The more the focal length of the scope comes closer to ~420mm the more difficult it will get to make the scans. If the solar image just fits in the slit (4.5mm) length, you will have to be very precise in making adjustments to the horizontal scan (and keep a full disc on the result). Ken's SimSpec will tell the exact sizes of the Sun per month.
Zoom in to te ROI (even 200%) to see the edges and the wiggling line. As already said a few times, the more it wiggles the better.
Once you master that, it's time for a better scope.
Paul
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