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

Post by Solar-Cologne » Thu Jul 09, 2020 4:03 pm

Well, finally, adapt the 160 C-ERF to the 6 "lens.

It is an aluminum lightweight construction by Matthias Wirth.

I attached two small plastic washers to one of the retaining screws so that the ERF does not sit flat on the lens to avoid internal reflections.
Since the frame is a bit larger, I cut four spacers and fixed them in the frame by 90 °.
Then package tape had to be used again ...... laugh.
It works very well.

Now the Bino is complete and we are waiting .......for our lovely SUN. :D
160er C-ERF-01.jpg
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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by marktownley » Thu Jul 09, 2020 5:38 pm

Nice to hear things are developing with the project!


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

Post by Solar-Cologne » Mon Jul 13, 2020 11:20 am

Hello Sun Friends.

The H-Alpha Bino is finally done.

The Bino won no beauty award ..... :)

It works ......

but the look insight into all tested eyepieces is much too restless with the PST Blockingfilter and the Zeiss-Abbe Barlow.
It is not possible to observe with two eyes ..... too bad.

I am a little frustrated.
Bino fertig-01.jpg
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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by Solar-Cologne » Mon Jul 13, 2020 11:33 am

I tested another variant on Sunday.

I temporarily installed my Lunt BF 1200 Blockingfilter on the left side.

Wouw .... the view is much calmer and you can directly see through the eyepiece without Barlow.

Now I have to save to buy a second Lunt BF 1200 Blockingfilter.


Or does someone of you have another Idea or a Tip for me ?


Sunny Greetings :movie
Achim
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Re: H-Alpha Double-Refractor 120 / 135 / 150mm Aperture ?

Post by marktownley » Tue Jul 14, 2020 4:22 pm

Looks good. Why won't it work with 2 eyes?


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

Post by DeepSolar64 » Wed Jul 15, 2020 2:41 am

It looks really nice, Achim. I hope you can get it to work well. This should beat any binoviewer.


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

Post by Rusted » Wed Jul 15, 2020 8:11 am

A fascinating project! Good luck in finishing it to your complete satisfaction. :bow

I always use the B1200 for surface detail and the original PST BF5 for proms.
The difference is quite dramatic if I use the "wrong" BF for the wrong job.

The B1200 passes much less light than the PST BF.
Which demands lots of gain when minimum gain is desirable to avoid noise around proms.

On surface detail the contrast with the B1200 is far better than the PT BF.
There is quite a difference in power between my examples.
Which requires considerable refocusing.


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