PST modification questions

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aboy
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PST modification questions

Post by aboy » Thu May 14, 2015 5:16 pm

Hello everyone.

I'm here today to ask for your help.

I do want to do a PST mod and I have a few questions and I hope anyone here can help me with it.

Question number one:

I do have 2 telescopes and I do really want to know which one is the is the best scope for this modification.

The first one is an Explorer Scientific 102 ed
Focal Length 714mm
Focal Ratio f/7

The second one is a Astrotelescope 102 achromatic
Focal Length 1100mm
Focal Ratio f/11

Question number two:

Do you guys have any preference on the PST USA made or Meade one?


Thanks for the time to read this post and many thanks for all the answer I'll get here.
:bow2
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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Re: PST modification questions

Post by Moriniboy » Thu May 14, 2015 5:43 pm

Astrotelescope, as its closer to F10 and as you use the etalon only there should be no difference (famous last words)
Hoping for clear skies.....lol

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Re: PST modification questions

Post by swisswalter » Thu May 14, 2015 6:00 pm

Hi Herberth

welcome back to the forum. I would also always go with the f/11

I have no answer to your second question
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 modification questions

Post by marktownley » Thu May 14, 2015 6:17 pm

the latter scope, without a shadow of doubt...

Regards the PST, they're all different levels of performance, regardless of country of origin. This is what you get with what are effectively base end etalons.
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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!

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Re: PST modification questions

Post by aboy » Thu May 14, 2015 7:15 pm

Thanks guys.

I'll order my ERF today or tomorrow.. Two weeks ago I try to get it but, some family problems pop up and I didn't order it.

By the way I found this in my lunch break:

http://www.photosbykev.com/wordpress/20 ... fications/

I saw a few familiar names. :D
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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aboy
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Re: PST modification questions

Post by aboy » Sat Jun 13, 2015 1:06 am

Finally I got a ERF Filter for my Mod.

I got it from a guy on CN and looks nice and clean. The only problem was that I touch the filter and leave a grease mark of my fingers.... :(

I do have alcohol and some another cleaner but, I don't want to mess up the coating any idea how to cleaning?

Image Image
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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swisswalter
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Re: PST modification questions

Post by swisswalter » Sat Jun 13, 2015 5:19 am

Hi Herberth

The ERF is certainly hardcoatet, so using water with some detergent works perfect. Rinse with distilled water. Clean with gentle force, do not rub
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 modification questions

Post by aboy » Sat Jun 13, 2015 5:59 am

swisswalter wrote:Hi Herberth

The ERF is certainly hardcoatet, so using water with some detergent works perfect. Rinse with distilled water. Clean with gentle force, do not rub

Thanks I will do that :bow
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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aboy
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Re: PST modification questions

Post by aboy » Sat Jun 13, 2015 6:12 pm

By the way. For the PST mod I just need the etalon filter right?
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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Re: PST modification questions

Post by swisswalter » Sun Jun 14, 2015 4:39 am

Hi Herberth


the Etalon, a blocking filter and some sort of ITF (PST, LUNT, Coronado)
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 modification questions

Post by marktownley » Sun Jun 14, 2015 7:58 pm

Hi Herberth, personally I would just rub the grease mark off with my t-shirt. These filters are a lot more durable than you think...
Image
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!

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Re: PST modification questions

Post by aboy » Tue Jun 16, 2015 2:06 am

swisswalter wrote: ITF

Sorry but I don't know what is a ITF :?
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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aboy
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Re: PST modification questions

Post by aboy » Tue Jun 16, 2015 2:30 am

Now a new Problem..... the Aluminum Filter Cell is too small to fit my astrotelescope.... the diameter of the inside of the filter cell is: 113 mm around 4.44 inches and the diameter of the front of my telescope is: 116 mm around 4.56 inches :mad:

Image Image


any Ideas please!!! :bow :bow
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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Re: PST modification questions

Post by swisswalter » Tue Jun 16, 2015 3:51 am

Hi Herberth

I see two solutions. A step up tube from the lens to the filterhausing or a new filter cell
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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aboy
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Re: PST modification questions

Post by aboy » Tue Jun 16, 2015 1:41 pm

swisswalter wrote:Hi Herberth

I see two solutions. A step up tube from the lens to the filterhausing or a new filter cell

What do you think about scrape a little more the filter cell? Do you think the filter cell will be too weak!?

Or any idea where I can order another filter cell?
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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Re: PST modification questions

Post by marktownley » Tue Jun 16, 2015 8:35 pm

Is this for the DS60 to fit on?
Image
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!

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Re: PST modification questions

Post by aboy » Tue Jun 16, 2015 10:11 pm

marktownley wrote:Is this for the DS60 to fit on?
No. Is to put my ERF filter cell on my telescope.
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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Re: PST modification questions

Post by swisswalter » Wed Jun 17, 2015 4:01 am

Hi Herberth

you would have to drill off 2 mm isnßt that too much ? You can order the cell over TS germany
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 modification questions

Post by marktownley » Wed Jun 17, 2015 6:31 am

what aperture is the ERF?
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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!

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Re: PST modification questions

Post by aboy » Wed Jun 17, 2015 11:25 am

marktownley wrote:what aperture is the ERF?
105 mm.
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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aboy
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Re: PST modification questions

Post by aboy » Wed Jun 17, 2015 1:21 pm

Guys also I want to ask this:

I know that I need a etalon from a PST. But, it is possible to use the 40 mm etalon?

Image

Image

Image

Let me know guys!
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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swisswalter
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Re: PST modification questions

Post by swisswalter » Thu Jun 18, 2015 2:51 am

Hi Herberth

just placing an etalon in the light train of a donor scope like yours will end up in a desaster. I highly recommend first reading the documents available in the mod section. may be you contact Kevin and ask him about of a copie of his famous paper
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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aboy
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Re: PST modification questions

Post by aboy » Thu Jun 18, 2015 4:17 am

swisswalter wrote:Hi Herberth

just placing an etalon in the light train of a donor scope like yours will end up in a desaster. I highly recommend first reading the documents available in the mod section. may be you contact Kevin and ask him about of a copie of his famous paper
Well was an idea.

Kevin??
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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marktownley
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Re: PST modification questions

Post by marktownley » Thu Jun 18, 2015 5:46 am

Ken, not Kevin ;)
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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!

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Re: PST modification questions

Post by aboy » Thu Jun 18, 2015 7:21 am

marktownley wrote:Ken, not Kevin ;)

Lol ok.

So... I'm doing all wrong or what? lol I'm lost now..

Also Where I can find the Ken famous paper!?
"I'm enough of an artist to draw freely on my imagination. Imagination is more important than knowledge. Knowledge is limited; imagination encircles the world."

--Albert Einstein, October 26, 1929
------------------------------------------------------------

EQ:

Double stack 60mm Coronado ( pre-meade ) H-alpha filters with a 15 blocking filter.

DMK 51AU02 the imaging source Mono CCD camera.

Orion Short 2x Barlow.

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope.

Astrotelescope ( Planet Killer ) 102mm f/11 hand corrected doublet. Refractor Telescope.

Losmandy - G11 ( Gemini 1 )

FireCapture, AutoStakkert 2, PixInsight, Registack 6 and Photoshop CS 6.

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