Probably a silly question but could you possibly stack a PST by
removing ERF & BF and then place a quark in its EP holder ?
Brian
Stacking PST with a quark
- Valery
- Way More Fun to Share It!!
- Posts: 4059
- Joined: Sun Nov 18, 2012 3:13 pm
- Has thanked: 156 times
- Been thanked: 893 times
Re: Stacking PST with a quark
The image will be way too dim.
Even for imaging with a lot of gain it is not worth to use.
Valery
Even for imaging with a lot of gain it is not worth to use.
Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- marktownley
- Librarian
- Posts: 42545
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20813 times
- Been thanked: 10485 times
- Contact:
Re: Stacking PST with a quark
try it and see
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!
- Valery
- Way More Fun to Share It!!
- Posts: 4059
- Joined: Sun Nov 18, 2012 3:13 pm
- Has thanked: 156 times
- Been thanked: 893 times
Re: Stacking PST with a quark
marktownley wrote:try it and see
I tried this twice with two Quarks. Last winter and recently, in last August. With a first Quark Chromosphere which is moderately narrow, I can get about 50% histogram filled with 30-40ms exposure and with a gain of about 2/5 of full gain scale. So, the picture is noisy enough and not worth to process. Pictures with a single PST etalon are better, as well as pictures with single Quark (a bit less contrasty than with PST Etalon, but larger FOV).
With even narrower Quark (significantly more contrast and dimmer visually than the first sample) I can't obtain even minimally acceptable picture. Way too dim image.
I think that before Quark's blocking filter modification, it is not worth to use. Quark's blocking filter, as you have found, rejects at least 4/5 of the energy at 656nm. Too much. One can try - no problem with this, but not worth to spend efforts.
I also tried to double stack my Quarks with LS50F H-a etalons. The results are just a tad darker than with the PST etalon.
Valery.
Last edited by Valery on Tue Sep 08, 2015 12:23 pm, edited 1 time in total.
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- marktownley
- Librarian
- Posts: 42545
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20813 times
- Been thanked: 10485 times
- Contact:
Re: Stacking PST with a quark
My experience of the dozen or so quarks i've looked through us that they're all different. As with anything, suck em' and see, and if it works it does, and if it don't it don't!
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!
- oreoluna
- Almost There...
- Posts: 963
- Joined: Tue Dec 09, 2014 3:34 am
- Location: Switzerland
- Has thanked: 1 time
- Been thanked: 661 times
Re: Stacking PST with a quark
Hello everybody.
I am now working for a long time with Quark PST double stacked, on SkyWatcher 150 f5 with internal D-ERF at 5m focal length!
The exposure times will be 10-13ms at Gamma 950 Gain 250
It is a very good system. I love it.
Jozef
I am now working for a long time with Quark PST double stacked, on SkyWatcher 150 f5 with internal D-ERF at 5m focal length!
The exposure times will be 10-13ms at Gamma 950 Gain 250
It is a very good system. I love it.
Jozef
- nickatnight
- Almost There...
- Posts: 638
- Joined: Sat May 30, 2015 5:30 am
- Location: Santa Clarita, California
Re: Stacking PST with a quark
Oreoluna....that looks so insanely simple. After the quark and PST etalon, is that just an adapter and spacer between the camera? Anything else modded that's not obvious in the photo?