Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

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Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

This my first post here showing my new home made solar scope. I have to thank my friend and mentor Jozef Csukas (oreoluna) who's perfect solar images and animations inspired me to get into hi-res solar imaging. I've used also his very nice open truss tube idea. I've modified it by 3D printing the mounting rings. The scope is shown here https://www.flickr.com/photos/photon_ch ... 644159956/

ImageHome made H-Alpha telescope by Frank T, on Flickr

The seeing was quite bad but somehow managed to capture the AR2670

ImageAR2670 in H-Alpha on 2017-08-04_T_13-38-51-0956_L_pipp_lapl3_ap892_1 IP90 by Frank T, on Flickr

ImageAR2670 in H-Alpha on 2017-08-04_T_13-38-51-0956_L_pipp_lapl3_ap892_1 IP90 by Frank T, on Flickr[/img]

https://www.flickr.com/photos/photon_ch ... 1493224702

Frank
Last edited by FeroT on Wed Aug 09, 2017 7:46 am, edited 2 times in total.


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by Valery »

Welcome here, Frank!

Nice to meet one more solar H-a imager!

Can you please, explain us what the advantages of such a triple stack inspired you to use such a complicated filtration rig? From all photos I saw on your flickr page the best (IMHO) are single stack Quark and DS of Quark + PST.

Also why did you destroy the Quark's native barlow? Does TV 4x Powermate works better with Andover 25mm filter?


Thanks,

Valery


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

Hello Valery,
I am not using the triple stack anymore. It was just a one off experiment. I use double stack mostly. It produces to my eye a little bit more contrast and a slight 3d effect. Single stack images look to me a little flatter. Quark is modified with the 25mm Andover blocking filter with Televue 4x Powermate. The Daystar Quark had, what I think, the small negative lens in their telecentric tied down too strongly with the retaining ring and it chipped when the temperatures changed during and after using it. I've asked Daystar to replace it, but they refused. When I took apart the lens assembly of the telecentric, I found out that it is made by Andover. So I bought the same filter with a larger diameter to combine it with the PowerMate, Edmund Optics sell a very nice 25mm lens holder which can be directly screwed into the nose-piece of the PowerMate. This gives a bit brighter image for the Quark and all combinations of double stacks.
Frank


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by MapleRidge »

Welcome Frank.

Interesting pics of the setup you have on Flicker, and the Ha images are great too. I look forward to seeing more from this setup.

Brian


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

Thanks Brian. I appreciate your comment.

Frank


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by Derek Klepp »

Welcome Frank and thanks for the setup pics.


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by Carbon60 »

Nice images, Frank. A heck of an entrance..... welcome.

Stu.


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by christian viladrich »

Welcome Frank. You've made a beautifull telescope.


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by marktownley »

Yes. A nice scope indeed!


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

Derek, Stu, Christian, Mark thank you all!

Frank


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by bart1805 »

Wow, what a sexy scope!
Is less weight the biggest advantage of the open truss concept or are there others? And what do you see as disadvantages?
Bart.


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by ffellah »

Frank: welcome ! Jozef does a fantastic job with his images and I understand how you got inspired...

Greta images to start and congratulations on your self made telescope.

I look forward to seeing more of your images.

Franco


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

bart1805 wrote: Sun Aug 06, 2017 6:51 pm Wow, what a sexy scope!
Is less weight the biggest advantage of the open truss concept or are there others? And what do you see as disadvantages?
Bart.
Hi Bart,
Thanks for the compliment. This scope is entirely for solar and H-Alpha, so the tube doesn't need to keep out any unwanted light of the light path. No baffles needed. The sun is the brightest source on the Sky and the whole spectrum is filtered down to a extremely narrow band. The open tube won't produce any "tube currents. I like the look of it. Easy to mount any accessory to the MakerBeam extrusions. As you can see the sub-aperture (110mm) D-ERF can be easily mounted to one of the inner hexagonal rings and take out if I want to use it with some of my other scopes. Easy to hold it, manipulate when I am mounting it on the mount or carry. I was able to use my 3D printer to make it. Will print more lens and D-ERF caps. So far I don't see any disadvantages with this setup.
Frank


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

Hey Franco,
Thanks. When I started with the H-Alpha imaging a year ago, I was watching all of you guys (and girls:-) on the web thinking that I will never come even close to the level of the work presented here. I know I am still far from getting to the level of Jozef and others, but the progress and mainly the JOY of getting further and further is the driving force.
I am lucky to live right next door from my work and in Hollywood the number of clear sunny days are very high. Most of the time I can grab a nice capture during my lunch break :-)
Frank


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by Valery »

I bet you will end up with a larger SCT. Or something like this. :)

150mm aperture is enough for about 1-2 years. Then aperture fever starts to grow rapidly.

Even a small compact 8" SCT can easily beat any 6" refractor. 10" is an optimal aperture for those who like high resolution sun imaging.

Valery


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

You are totally right Valery :-)
Put me on your list of potential buyers for the large diameter D-ERF !

Frank


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by Montana »

Wow! fantastic telescope and amazing images :hamster: :bow
Alexandra


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by eroel »

Frank:
Beautiful instrument and results.
Regards,
Eric.


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

Thank you Alexandra and Eric for your kind words.


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by bart1805 »

Hi Frank,
Thanks for your answers! I agree with you: it looks amazing! What is the weight of the scope?
Clear skies! Bart.


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

bart1805 wrote: Mon Aug 07, 2017 10:12 pm Hi Frank,
Thanks for your answers! I agree with you: it looks amazing! What is the weight of the scope?
Clear skies! Bart.
Hi Bart,
The weight of the scope is 9.3kg, this is without the etalon-telecentric-camera. I have finished another scope using a Wollensak 127mm diameter 1200mm focal length achromat , which have a 6" PVC tube from Home Depot and 3D printed parts and it is 8kg heavy. So the truss tube is not necessarily lighter, but I think more versatile for accepting any accessories and it looks cool :-)

https://www.flickr.com/photos/photon_ch ... 644159956/

ImageHome made Wollensak D127mm FL1200mm ES focuser by Frank T, on Flickr


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by bart1805 »

Hi Frank,
I think the weight advantage is bigger.
My scope is a Bresser 127/1200. It weighs 7.9 kg. The 150/1200 version weighs 11.1 kg.
The difference between your two Wollensaks is 1.3 kg. So a truss Bresser 150 would be approximately 9.2 kg. That is 1.9 kg less than the standaard version. So about 17%. That is more than just a little! Bart.


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

bart1805 wrote: Wed Aug 09, 2017 2:10 pm Hi Frank,
I think the weight advantage is bigger.
My scope is a Bresser 127/1200. It weighs 7.9 kg. The 150/1200 version weighs 11.1 kg.
The difference between your two Wollensaks is 1.3 kg. So a truss Bresser 150 would be approximately 9.2 kg. That is 1.9 kg less than the standaard version. So about 17%. That is more than just a little! Bart.
Thanks Bart for the info. I didn't expect the weight difference to be that big.
Frank


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by marktownley »

What material are you 3D printing in? I find i need full fill else everything is just brittle (which your equipment is quite clearly not!)


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by FeroT »

marktownley wrote: Wed Aug 09, 2017 6:03 pm What material are you 3D printing in? I find i need full fill else everything is just brittle (which your equipment is quite clearly not!)
I am using mostly PETG. I've tried first PLA, but it was brittle, some parts under stress cracked along the layers. For structural parts (mounting rings, saddle plate and so, I use full fill, but for the focuser mounting hexagon, lens holder, I use 20% infill. Printer is Original PRUSA i3 MK2S.


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Re: Home made Wollensak D153mm F1200 H-Alpha pictures of AR2670

Post by marktownley »

Thanks for the details. I'm using PLA, hence my brittle problem. I must look at the alternatives.


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