Stacking a PST

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Solar B
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Stacking a PST

Post by Solar B » Sat Aug 08, 2015 11:29 am

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
" Gentlemen only ever use Refractors "

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Merlin66
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Re: Stacking a PST

Post by Merlin66 » Sat Aug 08, 2015 11:33 am

Brian,
I only know of double stacking.
I have a DS PST/SM60 combo which works very well..........
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Solar B
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Re: Stacking a PST

Post by Solar B » Sat Aug 08, 2015 11:53 am

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
" Gentlemen only ever use Refractors "

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Merlin66
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Re: Stacking a PST

Post by Merlin66 » Sat Aug 08, 2015 11:01 pm

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.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

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Merlin66
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Re: Stacking a PST

Post by Merlin66 » Sat Aug 08, 2015 11:50 pm

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
PST SM60 double stack.jpg
Early SM60/PST DS
PST SM60 double stack.jpg (198.67 KiB) Viewed 1013 times
IMG_1544.jpg
SM60 double stack
TS102_PST 006.JPG
PST Mod
TS102_PST 006.JPG (83.68 KiB) Viewed 1013 times
TS102_PST 007.JPG
TS102 PST Mod
TS102_PST 007.JPG (63.81 KiB) Viewed 1013 times
TS102_Baader 001.JPG
TS102 Baader
TS102_Baader 001.JPG (72.67 KiB) Viewed 1013 times
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

Solar B
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Posts: 139
Joined: Mon Jul 27, 2015 9:29 am
Location: Dunfermline , Scotland

Re: Stacking a PST

Post by Solar B » Sun Aug 09, 2015 12:06 am

MANY THANKS ... it's going to take a while to get my head round your pics /
configuration but that I shall :)

Brian
" Gentlemen only ever use Refractors "

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