Hi Folks
Wondering if theres any other means of reducing the bandwidth slightly on a PST
without DS ... ie are there any sub-angstrom ha filters that I can stick on its nose at
all.
Thanks ... Brian
Stacking a PST
- Merlin66
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Re: Stacking a PST
Brian,
I only know of double stacking.
I have a DS PST/SM60 combo which works very well..........
I only know of double stacking.
I have a DS PST/SM60 combo which works very well..........
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Re: Stacking a PST
Thanks ... oh well DS again it is ... from previous ... I recall the image
being quite dark at 40 ... perhaps the newer SM40s are a bit brighter ?
Would it be possible to see a pic of your DS PST / 60 please.
Brian
being quite dark at 40 ... perhaps the newer SM40s are a bit brighter ?
Would it be possible to see a pic of your DS PST / 60 please.
Brian
" Gentlemen only ever use Refractors "
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Re: Stacking a PST
Brian,
I use a TS102 f11 scope for the PST mod (and with the Baader Herschel wedge).
I have a special adaptor ring to fit the older SM60/ T-max to the front (replacing the normal ERF I use)
Any DS configuration will give fainter views (bandwidth reduced by x0.5) - some users have removed the built-in ERF from the SM60 (Mark?) to improve transmission. IMHO it's not really a necessary improvement - maybe 5% more light......
I've used a double SM60 stack in the past and the PST/SM60 is almost just as good.
I'll try to post a couple of images later.
I use a TS102 f11 scope for the PST mod (and with the Baader Herschel wedge).
I have a special adaptor ring to fit the older SM60/ T-max to the front (replacing the normal ERF I use)
Any DS configuration will give fainter views (bandwidth reduced by x0.5) - some users have removed the built-in ERF from the SM60 (Mark?) to improve transmission. IMHO it's not really a necessary improvement - maybe 5% more light......
I've used a double SM60 stack in the past and the PST/SM60 is almost just as good.
I'll try to post a couple of images later.
"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
- Merlin66
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Re: Stacking a PST
A couple of photos of the early SM60 DS, the SM60/PST and the current TS102 with the Baader wedge and the PST Mod.
- Attachments
-
- Early SM60/PST DS
- PST SM60 double stack.jpg (198.67 KiB) Viewed 2264 times
-
- PST Mod
- TS102_PST 006.JPG (83.68 KiB) Viewed 2264 times
-
- TS102 PST Mod
- TS102_PST 007.JPG (63.81 KiB) Viewed 2264 times
-
- TS102 Baader
- TS102_Baader 001.JPG (72.67 KiB) Viewed 2264 times
"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
-
- Ohhhhhh My!
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Re: Stacking a PST
MANY THANKS ... it's going to take a while to get my head round your pics /
configuration but that I shall
Brian
configuration but that I shall
Brian
" Gentlemen only ever use Refractors "