H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by marktownley » Sun Apr 05, 2020 10:48 am

Love it! I enjoy a bit of modding and building like that myself.


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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Solar-Cologne » Mon Apr 06, 2020 12:02 pm

Hi Mark,

Me too ... because man / woman knows what you have. :D

The last adapter comes on Wednesday ..... waiting. :movie
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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Solar-Cologne » Thu Apr 09, 2020 10:12 pm

Still waiting ..... My metalworker only managed to make the adapters after Easter ..... a very lucrative order came in between.

:movie



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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Rusted » Fri Apr 10, 2020 8:08 am

Is there any difference between these specialist, bino diagonals and nested pairs of "normal" star diagonals?


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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Solar-Cologne » Fri Apr 10, 2020 8:59 am

What do You mean with "normal star diagonals" ?

The Mirror-System ?

http://ems-bino.com/ems-product-line-english/

Yes, a big difference.
The image is like a pair of binoculars, upright and sideways ..... very important for our brain.



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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Rusted » Fri Apr 10, 2020 5:41 pm

Solar-Cologne wrote:
Fri Apr 10, 2020 8:59 am
What do You mean with "normal star diagonals" ?

The Mirror-System ?

http://ems-bino.com/ems-product-line-english/

Yes, a big difference.
The image is like a pair of binoculars, upright and sideways ..... very important for our brain.
Thanks. I saw these mentioned years ago on CN and by Dave Trott.
I believe they were described as "lazy diagonals."
A high degree of precision seems to be required.
If you have to ask the price you can't afford them. ;)


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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Solar-Cologne » Tue Apr 14, 2020 7:20 am

Tatsuro Matsumoto in Japan builds very high precision.

It is not for nothing that Markus Ludes / APM and Matthias Wirth use often this EMS 60 ° two-mirror system.

https://www.cloudynights.com/topic/6654 ... 1200-bino/
https://www.apm-telescopes.de/de/ferngl ... o-152.html
http://www.astro-messe.de/AME2018/neuhe ... eiten.html

sunny Greetings
Achim



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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Solar B » Mon Apr 20, 2020 1:18 pm

Now your talking this looks like a great quality rig Achim :bow to

The PST BFs are actually 6mm it was only the very first ones from 04 that were 5mm.

I case you don't already know you may well have to apply some heat to your PSTs threadlock

with a good hairdryer to loosen it.

Brian


" Gentlemen only ever use Refractors "

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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Solar-Cologne » Sun May 03, 2020 6:57 pm

Hello Brian,

Nothing works with my hair dryer.
I'm looking for a hot air gun and big water pump pliers.

sunny Greetings
Achim



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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by marktownley » Sun May 03, 2020 7:00 pm

Solar-Cologne wrote:
Sun May 03, 2020 6:57 pm
I'm looking for a hot air gun and big water pump pliers.
I like your style ;)


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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Solar B » Sun May 03, 2020 8:47 pm

Best of luck Achim ... I had a PST EP holder and spacer loosen in my hands this evening ,

the threadlock just fell to the floor .... and it is my original PST from 2005 😃

Brian


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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Solar-Cologne » Sun Jun 28, 2020 5:32 am

Hello friends of the sun.

I went on vacation for several weeks in the German Eifel, near Laacher See.

After several attempts to solve the second PST etalon, I finally found a locksmith that has all the tools necessary to solve Locktite bonds.

The locksmith told me that we need at least 300 degrees Celsius for Locktite.
I got a little scared.
So we clamped the PST box in a large vice and I heated the etalon all around with a digitally adjustable hot air dryer.
We then took a pair of rough pliers and tried to loosen the etalon ..... no, no chance.
2nd attempt, warmed up again and tried with an approx. 80cm pipe wrench ..... finally the bond came off ....

Coronado....did a very good job.

My joy was very great, however, some mechanical traces were visible on the etalon, but it remained intact. :bow

Now we have a cloud period here ..... laugh.
It is always the same before a "first light".

Now I have to attach the second C-ERF (160mm) in front of the second refractor and wait for our sun .....

Sunny Greetings
Achim
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