Viually Observing the Sun......

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Solar-Cologne
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Viually Observing the Sun......

Post by Solar-Cologne » Thu Mar 26, 2020 10:21 pm

I am amazed at the international H-Alpha scene.

All users that I know in Germany and probably many users in solar-chat take pictures of the sun.

Who visually observes the H-Alpha sun ?

Please come out.

So I see here many H-Alpha Mods, especially for takeing Pictures of the Sun.

A visual H-Alpha telescope works differently than a photo scope.


sunny Greetings
Achim

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Re: Viually Observing the Sun......

Post by DeepSolar64 » Fri Mar 27, 2020 6:50 am

Achim,
I am one who for now only observes the sun visually. I post my visual observations with a GONG guide image that I use to direct my observations. I do plan in time to get into solar imaging but even then when I do I will still post my visual observations here in addition to what I image. I think many imagers here are also visual observers, even if they do not give detailed reports of what they see.

Most imagers here use the same scopes that visual observers use. They just equip them differently.

James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado AZS Alt/Az Mount
Lunt, Coronado, TeleVue, Orion and Celestron Eyepieces

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Re: Viually Observing the Sun......

Post by marktownley » Fri Mar 27, 2020 7:49 am

Hi Achim, I always enjoy a look visually but then I default to imaging, Mark
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: Viually Observing the Sun......

Post by MAURITS » Fri Mar 27, 2020 6:56 pm

I obseve always visual first, before imaging.
Regards,
Maurits

Vista del Cielo Observatory

www.vistadelcielo.be

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Re: Viually Observing the Sun......

Post by DeepSolar64 » Sat Mar 28, 2020 4:59 am

There is a place here for both visual and imaging observers. What I love about imaging is how well it documents what is there. The sun changes sometimes by the minute. Visually that can be seen but nothing shows it better than time-lapse video!

James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
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Re: Viually Observing the Sun......

Post by Montana » Sat Mar 28, 2020 2:31 pm

I usually visually observe first, then like Mark go in with the camera :) The old solar coronograph is great for prominence sketching. I just wish I had more time (may be this year ;) )

Alexandra

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Re: Viually Observing the Sun......

Post by DeepSolar64 » Sat Mar 28, 2020 5:37 pm

Good luck with that Alexandra. Post your sketches here when you do em'!

James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado AZS Alt/Az Mount
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Re: Viually Observing the Sun......

Post by Solar-Cologne » Sun Mar 29, 2020 3:38 pm

Why am I asking for visual telescopes / observers here ?

Because I have found in the 10 years of H-Alpha observation that a video camera sees much more than the human eye ... as you know yourself.

But now the spirits are divided.

A H-Alphascope with which you can record video is by no means a good H-Alphascope for visual observation !



Why ?

As you saw in my posts about my H-Alpha conversions / mods, I've already tried and tested a lot.

I am always in consultation with Oliver Smie and Wolfgang Lille.

I know ALL commercial H-Alpha telescopes, Coronado Solarmax, Lunt 35mm - 230mm and Solarscope Scopes.
If I forget something, please tell me.

I don't know AiryLab High Resolution Solar Telescope HaT - 8 "SC for H-alpha and I haven't looked through a Daystar Quark,

What has the best H-alpha image on my eyes shown me in 10 years ?

A PST mod.

But a PST mod with little glass in the system.

My PST Mod use:
a Skywarcher 6" f8 ( Mod f=10, 120mm eff, Diameter )
a C-ERF....NOT a D-ERF ....its terrible......Tested in the Year 2015 !!!
a PST-Etalon with its afocal lens system, or without and a real Telezentric.
a 5mm PST-BF....without PST - ERF !!!...and not a BF 15 or greater !
a Zeiss-Abbe Barlow....or
a Reducer 0,5 x
and at least an Okular, specifically a Microskopokular, WF..Widefield ..Suitable for pair of glasses....not an Astro-Ocular !

As an alternative, of course, I also use binocular approaches.
Zeiss Large field binoculars, ATM-Televue Large field binocular and Siebert Black Night BinoViewer only with microscope eyepieces, Type WF.

With a WF 20x Ocular ( 12,5 mm ) monoculkar and the Zeiss-Abbe with Click-Lock i became 216 x Magnification and i dont need any Doublestack in this small H-Alpha Field !.

But I still have some errors in my system that I have to correct. Over the time, new ideas come up by talking often with Oliver and Wolfgang.

It is sad that there are no more C-ERFs produced !!!

If You have any Questions about this so I will answer:

sunny Greetings
Achim
Last edited by Solar-Cologne on Sun Mar 29, 2020 11:39 pm, edited 2 times in total.

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Re: Viually Observing the Sun......

Post by eroel » Sun Mar 29, 2020 4:47 pm

Achim:
As an old timer in the hobby, I usually do a visual observation and then image the object.
Can not do it CaK because my eyes don´t help in that region.
Best regards,
Eric.

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Re: Viually Observing the Sun......

Post by DeepSolar64 » Sun Mar 29, 2020 4:59 pm

What is the difference between a C-ERF and a D-ERF?
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado AZS Alt/Az Mount
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Re: Viually Observing the Sun......

Post by Solar-Cologne » Sun Mar 29, 2020 10:56 pm

Hello Eric,

I am 62 Years old..and an Oldtimer too..... :D


Hello James,

The C-ERF energy protection filters reflect bluish and dark red.
When looking through it, a deep dark red sun disc appears.
They were the first energy protection filters for H-Alpha ..... but probably too expensive to manufacture.

The D-ERFs that I tested in 2015 reflect milky light green and when I looked through, I saw a glowing green sun disc.

Not suitable for Fabry-Perot-Etalons !!!
ONLY for Daystar and Solar Spectrum.

That still applies today.
Check out the Baader Planetarium website, ....D-ERF.
Baader Warning Post.jpg
Baader Warning Post.jpg (23.33 KiB) Viewed 188 times
That is why all D-ERF users still use pre-filters that can never improve the image compared to a real C-ERF.
And the sundisk in the Ocular at the Eyes is getting darker !!!

Have a look, two Posts before......My PST-Mod Components.



sunny Greetings
Achim

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Re: Viually Observing the Sun......

Post by DeepSolar64 » Mon Mar 30, 2020 12:29 am

Achim,

Thanks for explaining the differences between the two ERF types. I am new to Ha Solar astronomy and am still learning. My Coronado SM 60 has a red filter ahead of the etalon on the front of the scope. Is this a D-ERF? The red color would indicate that it would pass red light and block others. It could however simply just be a red piece of figured optical glass.

James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado AZS Alt/Az Mount
Lunt, Coronado, TeleVue, Orion and Celestron Eyepieces

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Re: Viually Observing the Sun......

Post by Solar-Cologne » Mon Mar 30, 2020 5:40 am

James,

Yes, this in a C-ERF, also the internal ERFs in the Lunts.

I will sent you a PN, because I cannot write a public comment here in the forum.

Achim
Last edited by Solar-Cologne on Mon Mar 30, 2020 5:58 am, edited 1 time in total.

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Re: Viually Observing the Sun......

Post by DeepSolar64 » Mon Mar 30, 2020 5:55 am

Solar-Cologne wrote:
Mon Mar 30, 2020 5:40 am
James,

Yes, this in a C-ERF, also the internal ERFs in the Lunts.

Achim
I suspected a C-ERF by the red coloration. Stay well and stay safe, Achim.

James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
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Re: Viually Observing the Sun......

Post by Solar-Cologne » Mon Mar 30, 2020 6:32 am

Dear James,

Thank you for the good wishes. :D

I am and stay healthy.

The nice Lord wants me to watch H-Alpha with my 120mm Bino in the future with two eyes.

You and all SolarChat users also stay healthy and alert. :movie

There is only one corona ..... the solar corona.

This Picture is taken at 29.03.2006 from Sebastian Voltmer, please note the copyright
www.weltraun.com


sunny Greetings
Achim
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Re: Viually Observing the Sun......

Post by DeepSolar64 » Mon Mar 30, 2020 6:20 pm

Achim,

I just wish we had something to view or image the corona outside of a solar eclipse. We can do the photosphere and chromosphere but not the corona.

Stay well my friend.

James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado AZS Alt/Az Mount
Lunt, Coronado, TeleVue, Orion and Celestron Eyepieces

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Re: Viually Observing the Sun......

Post by Valery » Mon Mar 30, 2020 6:26 pm

DeepSolar64 wrote:
Sun Mar 29, 2020 4:59 pm
What is the difference between a C-ERF and a D-ERF?
DERF = Dielectric Energy Rejection Filter

CERF = Cold Energy Rejection Filter

Cold means that the red glass remains relatively colder than simple red glass (due to IR/UV reflection coating on it).

CERF of large size are problematic - good quality red glass of such size is VERY expensive.

DERF are different. They can transmit mostly red light (like Baader one) or two bands H-a and CaK (like ARIES).


Valery
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Re: Viually Observing the Sun......

Post by Solar-Cologne » Tue Mar 31, 2020 3:33 am

Hello Valery,

Thank you for your detailed explanation.
I still don't know exactly how the new D-ERF series from Baader behaves.
As I said, my test took place in 2015

I know the NEW Baader and ARIES D-ERFs, but I have never used one or observed it.
I hope that in the near future I will have the opportunity to form my own opinion.

sunny Greetings
Achim

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Re: Viually Observing the Sun......

Post by Solar-Cologne » Thu Apr 02, 2020 8:51 pm

What I forgot, very important for a visually Scope:

All H-Alpha components except an internal etalon are installed slightly tilted.

The ERF filter and the block filter to banish the reflections from the optical axis,


Today i tested one Refraktor for my Binoscope 120mm Aperture 6"f8 (H-Alpha f=10 ) with 135er C-ERF, PST-Etalon, Matsumoto EMS U-L, erecting Mirror System, PST BF 5mm a little bit tilted without the original ITF-Filter, Zeiss-Abbe Barlow with ClickLock 2,25 x and a Microskopocular WF 20x ( 12,5mm ).

It was a little cloudy in front of the sun, but still 216 x magnification ... wouw. :D

in the Bino 302 x !!! :D

You have to consider that when you look at real bino, our brain produces a 1.4 x larger image than monocular.

With Two Scopes....?.....400 x......500 x....we will see.

Do the test yourself with binoculars.
Alternately cover one of the lenses ....

sunny Greetings
Achim

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