Ha Sun - 1 September.

[Smerral]

This morning's sun, imaged with PST double stack and Altair GPcam 2 at 09,26 UT. 7 pane mosaic.

 

[TerryMcK]

It looks very 3 dimensional

[Benny]

I really like this @Smerral can you share your doublestack build technique with us? Really 3D! Thank you in advance

[Smerral]

5 hours ago, Benny said:

I really like this @Smerral can you share your doublestack build technique with us? Really 3D! Thank you in advance

Thanks Benny!
I use a x2 barlow lens (without the extender) screwed onto the end of the camera nosepiece. This gives me focus and a nice image scale. I then take at least 7 image runs for a mosaic using Firecapture. I find 100 frames for each is ample. Most importantly I  then take a flat by placing a home made filter over the objective of the PST. I use  2 layers of the translucent plastic you find in paper holders in files and turn up the exposure and gain somewhat. I process all these in Autostakkert. I then use a program called Autopano Giga to create the final imosaic from the images, but there are other programs that will do this. The rest is just a few things like contrast enhancement and focusing done in Photoshop. Hope this helps!

[Benny]

16 hours ago, Smerral said:

Thanks Benny!
I use a x2 barlow lens (without the extender) screwed onto the end of the camera nosepiece. This gives me focus and a nice image scale. I then take at least 7 image runs for a mosaic using Firecapture. I find 100 frames for each is ample. Most importantly I  then take a flat by placing a home made filter over the objective of the PST. I use  2 layers of the translucent plastic you find in paper holders in files and turn up the exposure and gain somewhat. I process all these in Autostakkert. I then use a program called Autopano Giga to create the final imosaic from the images, but there are other programs that will do this. The rest is just a few things like contrast enhancement and focusing done in Photoshop. Hope this helps!

Thanks for sharing the technique @Smerral I didn't realise you could Barlow it directly on the camera. So are you using a normal PST or did you put two PST Etalons in-line one after the other? I Googled PST Doublestack when I saw your image and found various references to modifications but nothing definite. I have access to an old PST and was wondering if I should go down this route and what parts I would need to buy. 

[Smerral]

2 hours ago, Benny said:

Thanks for sharing the technique @Smerral I didn't realise you could Barlow it directly on the camera. So are you using a normal PST or did you put two PST Etalons in-line one after the other? I Googled PST Doublestack when I saw your image and found various references to modifications but nothing definite. I have access to an old PST and was wondering if I should go down this route and what parts I would need to buy. 

It is a standard PST with an SM40 screwed on the end, making it a double stack. I actually bought them separately.
https://www.firstlightoptics.com/telescopes-in-stock/coronado-personal-solar-telescope-pst-40mm-double-stacking-etalon.html

[Benny]

On 10/19/2022 at 3:44 PM, Smerral said:

It is a standard PST with an SM40 screwed on the end, making it a double stack. I actually bought them separately.
https://www.firstlightoptics.com/telescopes-in-stock/coronado-personal-solar-telescope-pst-40mm-double-stacking-etalon.html

Thanks I was curious as I thought maybe it was a DIY setup. I saw (somewhere) a post about double stacking quarks with PST Etalons.