Fraz - Quark Double-Stacked with a PST etalon
-
- Ohhhhhh My!
- Posts: 153
- Joined: Fri Jun 20, 2014 5:36 pm
- Location: LIVERPOOL
- Has thanked: 178 times
- Been thanked: 96 times
Fraz - Quark Double-Stacked with a PST etalon
Hi There,
I followed Marty's journey mainly and also sent to Beat Kohler in Switzerland for the adapters. So I first of all want to say a big Thankyou to him and those who went before him and advised we that came after.
viewtopic.php?f=9&t=25420
I have only just been out and proved the concept working for myself and even then it was too cloudy to image but I could see structures on the screen enough to tune a little.
I'll drop you an image of my setup including diagonal for now. ES 127 triplet with a full aperture D-ERF
I followed Marty's journey mainly and also sent to Beat Kohler in Switzerland for the adapters. So I first of all want to say a big Thankyou to him and those who went before him and advised we that came after.
viewtopic.php?f=9&t=25420
I have only just been out and proved the concept working for myself and even then it was too cloudy to image but I could see structures on the screen enough to tune a little.
I'll drop you an image of my setup including diagonal for now. ES 127 triplet with a full aperture D-ERF
Stage 2 mod completed @ 100, 127.
Istar 228 arrived, building the frame slowly while learning cnc.
Istar 228 arrived, building the frame slowly while learning cnc.
- MalVeauX
- Way More Fun to Share It!!
- Posts: 1858
- Joined: Tue May 09, 2017 7:58 pm
- Location: Florida
- Has thanked: 1171 times
- Been thanked: 1360 times
Re: Fraz - Quark Double-Stacked with a PST etalon
Looks good! Any results yet? I found the biggest challenge was getting them both on band to a degree that the double limb was eliminated.
Very best,
Very best,
-
- Ohhhhhh My!
- Posts: 153
- Joined: Fri Jun 20, 2014 5:36 pm
- Location: LIVERPOOL
- Has thanked: 178 times
- Been thanked: 96 times
Re: Fraz - Quark Double-Stacked with a PST etalon
I could not get more than a couple of hundred shots of a limb version but will try to post it in all its horror later.
Stage 2 mod completed @ 100, 127.
Istar 228 arrived, building the frame slowly while learning cnc.
Istar 228 arrived, building the frame slowly while learning cnc.
-
- Ohhhhhh My!
- Posts: 153
- Joined: Fri Jun 20, 2014 5:36 pm
- Location: LIVERPOOL
- Has thanked: 178 times
- Been thanked: 96 times
Re: Fraz - Quark Double-Stacked with a PST etalon
I'm just getting an image together but have read your thread extensively and will examine the results more thoroughly when I capture some edges.
I have only had the Quark for a session now and it is the first pressure tuned etalon I have had to work with so this is all a big tuning turning learning whirlwind at the moment.
I may have lucked out on listening to all of the advice so far and am a step or two ahead but I am far from the finished article. Any advice is welcome.
Fraz.
Stage 2 mod completed @ 100, 127.
Istar 228 arrived, building the frame slowly while learning cnc.
Istar 228 arrived, building the frame slowly while learning cnc.
- marktownley
- Librarian
- Posts: 42272
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20435 times
- Been thanked: 10245 times
- Contact:
Re: Fraz - Quark Double-Stacked with a PST etalon
Great results! I've done the same too.
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!
-
- Ohhhhhh My!
- Posts: 153
- Joined: Fri Jun 20, 2014 5:36 pm
- Location: LIVERPOOL
- Has thanked: 178 times
- Been thanked: 96 times
Re: Fraz - Quark Double-Stacked with a PST etalon
At the end of the day I would recommend it if you have the bits lying around and it will give you 20%.
Don't go spending hundreds of pounds on this though, spend more time looking for good seeing and spending time with those you love.
Buy quality, and in parts that are exchangeable or that are a the top of their game. The value jump over the last few years has been huge.
Don't go spending hundreds of pounds on this though, spend more time looking for good seeing and spending time with those you love.
Buy quality, and in parts that are exchangeable or that are a the top of their game. The value jump over the last few years has been huge.
Stage 2 mod completed @ 100, 127.
Istar 228 arrived, building the frame slowly while learning cnc.
Istar 228 arrived, building the frame slowly while learning cnc.
- marktownley
- Librarian
- Posts: 42272
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20435 times
- Been thanked: 10245 times
- Contact:
Re: Fraz - Quark Double-Stacked with a PST etalon
Sage adviceFRAZ wrote: ↑Sun Apr 24, 2022 2:39 pm At the end of the day I would recommend it if you have the bits lying around and it will give you 20%.
Don't go spending hundreds of pounds on this though, spend more time looking for good seeing and spending time with those you love.
Buy quality, and in parts that are exchangeable or that are a the top of their game. The value jump over the last few years has been huge.
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!
-
- Way More Fun to Share It!!
- Posts: 2031
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1189 times
Re: Fraz - Quark Double-Stacked with a PST etalon
had bits around
it works pretty well
not as tight as Lunt-Quark
but you can see difference
it works pretty well
not as tight as Lunt-Quark
but you can see difference
-
- Way More Fun to Share It!!
- Posts: 2031
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1189 times
Re: Fraz - Quark Double-Stacked with a PST etalon
BTW
i tried a prom quark model with PST etalon
it basically converts prom model to chromosphere model
visually it quite pronounced
here is test shots - did not add any contrast to images
no PST etalon
i tried a prom quark model with PST etalon
it basically converts prom model to chromosphere model
visually it quite pronounced
here is test shots - did not add any contrast to images
no PST etalon
-
- Way More Fun to Share It!!
- Posts: 2031
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1189 times
-
- Way More Fun to Share It!!
- Posts: 2031
- Joined: Sat Nov 24, 2012 2:33 pm
- Has thanked: 57 times
- Been thanked: 1189 times
Re: Fraz - Quark Double-Stacked with a PST etalon
it was very uniform
also tried with chromo combo model
that was problem
in focus becomes real issue
also tried with chromo combo model
that was problem
in focus becomes real issue
-
- Ohhhhhh My!
- Posts: 153
- Joined: Fri Jun 20, 2014 5:36 pm
- Location: LIVERPOOL
- Has thanked: 178 times
- Been thanked: 96 times
Re: Fraz - Quark Double-Stacked with a PST etalon
Most of my other shots were drowned in clouds so had major banding and gradients even with a flat I just couldn't recover other than this one. I put it through Pixinsight DBE.
Stage 2 mod completed @ 100, 127.
Istar 228 arrived, building the frame slowly while learning cnc.
Istar 228 arrived, building the frame slowly while learning cnc.
-
- Way More Fun to Share It!!
- Posts: 2150
- Joined: Sun Jun 14, 2015 4:46 pm
- Location: France
- Has thanked: 1 time
- Been thanked: 2713 times
- Contact:
Re: Fraz - Quark Double-Stacked with a PST etalon
Nice mod and first results !
Christian Viladrich
Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
http://www.astronomiesolaire.com/
Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
http://www.astronomiesolaire.com/
-
- Ohhhhhh My!
- Posts: 153
- Joined: Fri Jun 20, 2014 5:36 pm
- Location: LIVERPOOL
- Has thanked: 178 times
- Been thanked: 96 times
Re: Fraz - Quark Double-Stacked with a PST etalon
Got a couple more shots this morning and in particular a representative example of comparing the quark alone versus the quark and pst etalon.
Stage 2 mod completed @ 100, 127.
Istar 228 arrived, building the frame slowly while learning cnc.
Istar 228 arrived, building the frame slowly while learning cnc.
-
- Ohhhhhh My!
- Posts: 153
- Joined: Fri Jun 20, 2014 5:36 pm
- Location: LIVERPOOL
- Has thanked: 178 times
- Been thanked: 96 times
Re: Fraz - Quark Double-Stacked with a PST etalon
I didn't do anything special with the processing on these images and kept it pushed to the same degree on each to see if it could go further on one over the other. They both showed the same negative effects from seeing and pushing convolution. I held configuration for both on most aspects but had to draw back for the Quark only and lighten to produce any edge of limb detail.
I also tried my other PST etalon in the Doublestack configuration with the Quark. (The lenses intact) It was as stated by others before, too dark. The scientist in me had to have a look. (approximately 20-30% on the histogram)
On the same note. The double stack configuration will drop the capture rate to 10-20 frames per second depending on the size of capture. If you are not already doing so then get yourself a ringbuffer set up or you will have multiple stalls with firecapture.
I also tried my other PST etalon in the Doublestack configuration with the Quark. (The lenses intact) It was as stated by others before, too dark. The scientist in me had to have a look. (approximately 20-30% on the histogram)
On the same note. The double stack configuration will drop the capture rate to 10-20 frames per second depending on the size of capture. If you are not already doing so then get yourself a ringbuffer set up or you will have multiple stalls with firecapture.
Stage 2 mod completed @ 100, 127.
Istar 228 arrived, building the frame slowly while learning cnc.
Istar 228 arrived, building the frame slowly while learning cnc.
-
- Ohhhhhh My!
- Posts: 153
- Joined: Fri Jun 20, 2014 5:36 pm
- Location: LIVERPOOL
- Has thanked: 178 times
- Been thanked: 96 times
Re: Fraz - Quark Double-Stacked with a PST etalon
Another decent shot from this mod yesterday.
The frame rate on capture is pretty low at 10-15 fps and increases only slightly with a reduction in size. This is with a gain in the region of 80 and exposure of 65 or so in firecapture.
I found there to be a lot of banding and newton rings and the need for a lot of twisting of etalons to catch the best I could get example. The flat is absolutely essential.
This was the double stack quark 1000 frames stacking 10% in very variable seeing. ASI 174m on an ES127 with a full frame D-ERF.
The frame rate on capture is pretty low at 10-15 fps and increases only slightly with a reduction in size. This is with a gain in the region of 80 and exposure of 65 or so in firecapture.
I found there to be a lot of banding and newton rings and the need for a lot of twisting of etalons to catch the best I could get example. The flat is absolutely essential.
This was the double stack quark 1000 frames stacking 10% in very variable seeing. ASI 174m on an ES127 with a full frame D-ERF.
Stage 2 mod completed @ 100, 127.
Istar 228 arrived, building the frame slowly while learning cnc.
Istar 228 arrived, building the frame slowly while learning cnc.
- marktownley
- Librarian
- Posts: 42272
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20435 times
- Been thanked: 10245 times
- Contact:
Re: Fraz - Quark Double-Stacked with a PST etalon
Nice results!
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!
Re: Fraz - Quark Double-Stacked with a PST etalon
Impressive difference, nice job Thank you for posting.
Could I ask how much tuning of the PST etalon was needed?
Any idea if the effect due to narrowing the band or tightening transmission curvature slope?
I know I’m a little late for this post.
Best regards from Denmark
Could I ask how much tuning of the PST etalon was needed?
Any idea if the effect due to narrowing the band or tightening transmission curvature slope?
I know I’m a little late for this post.
Best regards from Denmark
-
- Ohhhhhh My!
- Posts: 153
- Joined: Fri Jun 20, 2014 5:36 pm
- Location: LIVERPOOL
- Has thanked: 178 times
- Been thanked: 96 times
Re: Fraz - Quark Double-Stacked with a PST etalon
Hi Gera,
No more tuning than usual. You will get some polarising effect until you match the best quark to pst. Once setup, it is repeatable.
Stage 2 mod completed @ 100, 127.
Istar 228 arrived, building the frame slowly while learning cnc.
Istar 228 arrived, building the frame slowly while learning cnc.
Re: Fraz - Quark Double-Stacked with a PST etalon
[/quote]
Hi Gera,
No more tuning than usual. You will get some polarising effect until you match the best quark to pst. Once setup, it is repeatable.
[/quote]
That does not sound too bad.
Thanks for some very inspiring inputs. Might have to try it for visual observation.
Best regards
Thomas
Hi Gera,
No more tuning than usual. You will get some polarising effect until you match the best quark to pst. Once setup, it is repeatable.
[/quote]
That does not sound too bad.
Thanks for some very inspiring inputs. Might have to try it for visual observation.
Best regards
Thomas