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Laszlo Francsics

Thanks to everyone.

Christian, yes, these pictures were taken exactly where I took my 1st successful solar image series almost exactly 2 years ago. It was you who wrote the first post about them here on solarchat.

Laszlo Francsics

Thanks to everyone.

Christian, yes, these pictures were taken exactly where I took my 1st successful solar image series almost exactly 2 years ago. It was you who wrote the first post about them here on solarchat.

Laszlo Francsics

AR 3614 and 15 with Soleye "Reverse Granule" Ca-K filter and "Violet" mirror. Soleye300 with Violet mirror ASI 174 MM 3 ms/80 gain - 4000/600 frames - narrowband 0,13 ms/0 gain 4000/600 frames - broadband Soleye "Reverse Granule" 3,7A Ca-K filter broadband image: EO 393...

Laszlo Francsics

AR 3614 and 15 with Soleye "Reverse Granule" Ca-K filter and "Violet" mirror. Soleye300 with Violet mirror ASI 174 MM 3 ms/80 gain - 4000/600 frames - narrowband 0,13 ms/0 gain 4000/600 frames - broadband Soleye "Reverse Granule" 3,7A Ca-K filter broadband image: EO 393...

Laszlo Francsics

Hi, thank you all, Remember, we are super close to the limb. A 110-140 mm refractor would hardly be able to resolve this much detail here. Closer to the central meridian would indeed show a similar image. It's a tricky image because the field of view is very small and the magnification is huge, abou...

Laszlo Francsics

Hi Christian, The peak transmission of the filters is between 50-60%. This particular one is 56%. Have you been told what the peak transmission of the Solarspectrum Ca-K is? That would be a really exciting possibility. Laszlo Hi Laszlo, This is quite good considering the low altitude of the Sun. Wha...

Laszlo Francsics

AR 3595 sunspot group with Soleye "Reverse Granule" Ca-K filter and "Violet" mirror. Soleye300 with Violet mirror ASI 174 MM 1,5 ms/120 gain - 4000/600 frames Soleye "Reverse Granule" 3,7A Ca-K filter (not Alluxa) average seeing - 10 km/h steady wind/windchill First tes...

Laszlo Francsics

As a member of the APY jury, I would like to express my disappointment with this image. During the judging (this is not a public vote) I was against the selection and awarding of this image for several reasons (non-homogeneous background, unnatural appearance - not the inversion, but the dark disc),...

Laszlo Francsics

Hi Alashahin Thank you also on behalf of the team. Indeed, Lunt offers both day and night photography. I thought this was unnecessary so far, since, if one buys a Lunt, one wants to photograph the Sun. However, what you suggest is that a 30 cm mirror already has potential for the Moon and planets, s...

Laszlo Francsics

Hi, fortunately, mirror replacement is not complicated. Since the tube is open, the mirror can be removed from the front by releasing the locking connections, in about 3 minutes, without having to disturb the primary cell. Roughly, the mirror change takes 10 minutes, and then the collimation, the le...

Laszlo Francsics

Almost. The Soleye300 is planned to be available with 3 types of mirrors. "Soleye white" - uncoated for continuum, which requires a minimum ND 3.8 filter or more for visual observation "Soleye Violet" - for Ca-K, G-band and UV, which is not good for visual viewing, but can work w...

Laszlo Francsics

The Soleye uncoated mirror +ND 3,8 filter on the eyepiece side is equivalent to the standard Newton with ND5.0 solar film pre-filter.

Laszlo Francsics

Hi, Basically Soleye 300 is designed for photography purposes not for visual. However, adding a dedicated H-alpha etalon (p.e. Quark) to the H-alpha 'Soleye Red' setup, it is possible to observe the Sun visually. As for continuum, if you add at least an ND3.8 filter on the eyepiece side, you will ha...

Laszlo Francsics

Hi Guys, we've got some exciting news. First, I'd like to say a heartfelt THANK YOU! to everyone who gave us feedback and filled out the short questionnaire we shared with you earlier. https://forms.gle/whmFy6HwejDR6XAA6 Any new entries are much appreciated, even though we obviously settled for a pr...

Laszlo Francsics

Dear Thierry, Thank you for your post. The animation is very impressive, definitely unique of its kind. When designing the soleye 300 solarnewton, collimation stability was a priority. The adapted construction and design principles were aimed at maintaining collimation even after a bumpy off-road cl...

Laszlo Francsics

Hi Dennis, As you already mentioned, the C14 needs some kind of filtering/ERF to do solar safely and without significant thermal-related problems. If I am reading correctly, the Soleye 300 is promising unfiltered white light imaging (the primary mirror works as a kind of solar wedge prism, letting ...

Laszlo Francsics

A beautiful instrument....though quite out of reach for me. However, I am curious about the spider / secondary mounting. Is the right angle mirror coated or otherwise designed for solar, and how is it attached to the spider? Isolating mirror optics from the metal components to deal with difference ...

Laszlo Francsics

Hi and happy new year to all : ) I read now several times that a sct has thermal problems. As a sct user (day and night time) i want to adress this from my own experience: These issues are only relevant for night time (big temperature differentials) and can be solved with insulation + dew shielding...

Laszlo Francsics

I can't stress enough that resolution is a joint function of optics diameter and wavelength. The C14's optical design allows it to reach its maximum performance around 500 nm. In contrast, a solar newton reaches its maximum performance near 400 nm. This gives a greater advantage in solar surface res...

Laszlo Francsics

It is important to highlight that if you want to compare the image quality of telescopes, you do so at the same image processing level. In this pair of images there is no post-processing noise filtering (in either image), so you can see how much advantage solar newtons have over a non-solar telescop...

Laszlo Francsics

I am curious about thermal absorption of the "naked" primary reflective surfaces. Should these solar Newtonians be shielded from direct solar infall between exposures? How would this square with capturing data over extended periods for long period animations? Laminar scrubbing of the prim...

Laszlo Francsics

Valery, A comparison between the two scopes (C14 - solar newton) was made by Christian Viladrich himself formely in 2018, when they captured the Sun from the same place at the same time with Thierry Leagult. It is really interesting and useful to read this thread: https://solarchatforum.com/viewtopi...

Laszlo Francsics

I think it's a great opportunity to discuss a hidden difficulty and potential of solar photography. However, I must add, I did not want to speak against a certain type of telescope. What I wanted, is to give a realistic comparison of how solar newtons like the soleye300 and 3 other pieces of such te...

Laszlo Francsics

"The Soleye 300 is fully capable of hi-res Ca-K photography which means it also achieves higher resolutions than the C14. "(С) What about the laws of physics? Are they no longer valid? Or maybe this is a typo and you meant the C11 scope? If not a typo, solid poofs required. Valery Hi Vale...

Laszlo Francsics

Hi Guys, Thank you very much for all your valuable responses. Your suggestions are totally worth considering. We are definitely coming up with a smaller scope in 2024. As for H-alpha, we are developing a special mirror, that gains enough light in the band. Happy holidays and happy new year for all o...

Laszlo Francsics

Hi, thank you all very much for answering the questions. What a great community! All your comments are really helpful. Thanks for sharing your thoughts on this topic, I really appreciate that. If some of you haven't filled the questionaire, and have a few minutes for that, please don't hesitate to c...

Laszlo Francsics

Hi Guys, I'm László Francsics, some of you might have heard about me or seen the solar photos I posted here a few months ago. They tend to get some attention. I was inactive for a while but for some very specific reasons. In the last year or so I've been busy with something, and I want to tell you a...

Laszlo Francsics

Thank you for your kind comments, I am honored to read them, they are very encouraging to me.
Laszlo

Laszlo Francsics

I hesitate to bring this up in this context but does anyone have an explanation for the linear artefact? Solar_120423_anim_cr_12 linear artifact.jpg I think this is a real phenomenon. I found a picture showing the beginning of filament development an hour earlier. Solar_110820_pipp_lapl2_ap2794_Res...

Laszlo Francsics

Solar granule and intergranular filigree in motion around AR 13112 sunspot. Monochrome processing 300/1200 uncoated Newtonian ASI 174 MM 0,5 ms - 4000/400 frames 5 pics in 5 minutes Edmund Optics 394/10 nm 25 mm/ZWO Blue (ERF) stable seeing - gentle east wind 300SOLAR.jpg The AR13112 sunspotgroup it...

Laszlo Francsics

Thank you for all the kind comments, especially for the SPOD!

Laszlo

Laszlo Francsics

Laszlo, This is with a wide band CaK filter, right? It looks like a small flare to me. The reason I asked about the filter is that flares should be considerably easier to see in CaK than in continuum. A flare has to be unusually intense to be seen in white light. Great catch! James Is a penumbral g...

Laszlo Francsics

That's absolutely terrific :bow :bow :bow I have caught one of these before and asked the Kanzelhohe team, they reckoned it was a bright penumbral grain https://solarchatforum.com/viewtopic.php?t=35468 Like a mini flare. It is very exciting to see and quite rare but much more common than a true WL ...

Laszlo Francsics

Hi, thank you for your kind comments!

This flash must be a common phenomenon, however, it was unusall for me.

Laszlo

Laszlo Francsics

Hi, thank you for your kind comments!

This flash must be a common phenomenon, however, it was unusall for me.

Laszlo

Laszlo Francsics

AR13089 sunspot with a small and sudden flash. Can it be a small fler in Ca-K? Monochrome and color processing. 300/1200 uncoated Newtonian ASI 174 MM 0,5 ms - 4000/400 frames Edmund Optics 394/10 nm 25 mm/ZWO Blue (ERF) poor seeing - zero wind - through 40% density cirrus clouds 300SOLAR.jpg Solar_...

Laszlo Francsics

AR13089 sunspot with a small and sudden flash. Can it be a small fler in Ca-K? Monochrome and color processing. 300/1200 uncoated Newtonian ASI 174 MM 0,5 ms - 4000/400 frames Edmund Optics 394/10 nm 25 mm/ZWO Blue (ERF) poor seeing - zero wind - through 40% density cirrus clouds 300SOLAR.jpg Solar_...

Laszlo Francsics

Congratulations for your unique vision, your perseverance and your brilliant implementation. As a member of the Astronomy Photographer of the Year jury, I can say that there wasn't much debate that yours should be the winning photo of the Sun category. The result is also interesting to me because ma...

Laszlo Francsics

Congratulations! I was just waiting for these pictures. Alluxa 0.37 images are stunning. It combines the advantages of ultra narrowband filters and large aperture telescopes. It has a real Ca-K appearance and the resolution is huge. Can it be expected that a similar filter will be distributed in ast...

Laszlo Francsics

Hi Christian, Beautiful shots! Despite the lack of good seeing, these images can be very close to the maximum resolution of the 30 cm telescope. Did you capture on other wavelengths like G-band or Ca-K? I also see a post on facebook from Thierry Legault from ST Véran. Is he also a member of your tea...

Laszlo Francsics

christian viladrich wrote: ↑Sat Aug 20, 2022 3:57 pm Splendid image, processing, and telescope !
Well done !

Thank you Christian!

László

Laszlo Francsics

It's a great picture. I'm curious about your equipment specification. Mirror, second mirror brand name, etc. Hi, It is a custom made newtonian telescope, design by me, after consultations with couple of astrophotographers like Christian Viladrich. It is manufactured by friend of mine (amateur astro...

Laszlo Francsics

Hi László, Super work here ! Did you use a Solar wedge to do this, as I did not know Reflectors were suitable for solar work. Many thanks. Magnus Hi Magnus, Yes they are. I have an uncoated 12" mirror, that acts like a Herschell Prism, reflects 4% percent of the sunlight. I don't need any addi...

Laszlo Francsics

Thank you for your kind comments,

László

Laszlo Francsics

Montana wrote: ↑Thu Aug 18, 2022 9:26 am That is sooo beautiful it reminds me of a comet

Alexandra

yes, it really does look like a comet. Or Helios on his fiery chariot as pulled by the quadriga

Laszlo Francsics

AR3004 sunspot shaped like a "fireball" on May 4.
Monochrome and color processing.

300/1200 uncoated Newtonian

ASI 174 MM

0,5 ms - 4000/400 frames

Baader Solar Continuum 2"

average seeing - 10-20 km/h steady wind

: 300SOLAR.jpg (34.32 KiB) Viewed 977 times

: 2164_d416_ff.jpg (917.81 KiB) Viewed 977 times

: 2164_d416.jpg (1.5 MiB) Viewed 977 times

Laszlo Francsics

Hi Alex, It looks very promising. I think it is still not the full resolution of a 300mm mirror, but you have a better resolution now, than most of the H-alpha solar photos. May I ask which instrument is it? Did you use an energy rejection mirror, or a sub aperture ERF filter? Bests, Lászlo Francsi...

Laszlo Francsics

Hi Alex, It looks very promising. I think it is still not the full resolution of a 300mm mirror, but you have a better resolution now, than most of the H-alpha solar photos. May I ask which instrument is it? Did you use an energy rejection mirror, or a sub aperture ERF filter? Bests, Lászlo Francsics

Laszlo Francsics

Spendid Laszlo !! Could you post a BW version ? Thank you Christian! I am attaching the BW version below. I am curious what your opinion is: do you prefer the BW? I see that many uploaded continuum images are BW, while the big observatories color the solar images. Solar_092454_pipp_lapl2_ap4174_Res...

Laszlo Francsics

Thanks for your kind comments!

Best regards,
Laszlo

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