PST Mods - getting sufficient in-focus

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Re: PST Mods - getting sufficient in-focus

Post by astroshot » Wed Sep 25, 2013 4:16 pm

The end of the adapter on the table screws into the PST.
The side nearest the camera fits into the telescope focuser.
This is where the 48mm female threads are located.

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Re: PST Mods - getting sufficient in-focus

Post by swisswalter » Wed Sep 25, 2013 8:10 pm

Hi Michael

as soon as we have daylight again here I can check a possible solution
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

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Re: PST Mods - getting sufficient in-focus

Post by peter drew » Thu Sep 26, 2013 8:55 am

Michael. Are you sure that the 48mm female threads are "active" or just an antireflection detail? :)

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Re: PST Mods - getting sufficient in-focus

Post by swisswalter » Thu Sep 26, 2013 2:05 pm

Hi Michael

here are the pics

assembled





disassembled





Note the front lens of the PST is now up front the 2" Extension


but it works even easier the other way round

the overview






the GPC fits very nicely in ;-)





As soon as we get some sunshine here again (may take some months or so ) I'll shot AR's with that configuration and different scopes
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

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Re: PST Mods - getting sufficient in-focus

Post by astroshot » Fri Sep 27, 2013 5:09 am

Thanks for taking the time to post the pics Walter.
So, the GPC fits just in front of the etalon.
I see it comes with a white (nylon?) retainer. My understanding is that this retainer is designed for t-2.
The PST adapter which fits over the GPC, is this the AOK Swiss version?
What stops the glasspath falling through?
As I understand the GPC doesn't gave any threads of itself.
Many thanks,
Michael
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Re: PST Mods - getting sufficient in-focus

Post by swisswalter » Sat Sep 28, 2013 7:54 am

Thanks for taking the time to post the pics Walter.
So, the GPC fits just in front of the etalon.
I see it comes with a white (nylon?) retainer. My understanding is that this retainer is designed for t-2.
The PST adapter which fits over the GPC, is this the AOK Swiss version?
What stops the glasspath falling through?
As I understand the GPC doesn't gave any threads of itself.
Many thanks,
Michael

Hi Michael

yes that is the aok swiss pst Adapter

The GPC is bigger in diameter and therefore holds just by squeesing inbetween the PST and the Adapter

Yes the GPC has no threads at all
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

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Re: PST Mods - getting sufficient in-focus

Post by astroshot » Sat Sep 28, 2013 1:16 pm

Thanks Walter.
Ill order it so.
Once I have that, I just need to find good PST.
Michael OConnell
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Re: PST Mods - getting sufficient in-focus

Post by swisswalter » Sat Sep 28, 2013 1:23 pm

Hi Michael

A PST is for sale at astromart
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

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Re: PST Mods - getting sufficient in-focus

Post by astroshot » Sat Sep 28, 2013 2:34 pm

Two problems:
1. Shipping costs from the US to Europe
2. Taxes
Might be better getting a s/h one locally which I can test??
Michael OConnell
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Re: PST Mods - getting sufficient in-focus

Post by peter drew » Sat Sep 28, 2013 3:31 pm

A better plan Michael. The PST's vary from OK to excellent, you need a good one if it is to be modified for the best results. :)

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Re: PST Mods - getting sufficient in-focus

Post by swisswalter » Sat Sep 28, 2013 3:34 pm

Hi Michael


you are so right. Locally is much better, but availability :?
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

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Re: PST Mods - getting sufficient in-focus

Post by astroshot » Sat Sep 28, 2013 8:18 pm

Availability and the weather to test it are the problems I have to deal with alright.
Michael OConnell
I87 Astroshot Observatory

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