Search found 1041 matches

by krakatoa1883
Sat Jun 05, 2021 2:11 pm
Forum: This is SolarChat !!
Topic: AR 12827-12829 - Halpha
Replies: 13
Views: 445

Re: AR 12827-12829 - Halpha

Thanks Alex, thanks Franco How are you succeeding such a magnification with your Modified Celestron XLT 100ED. Barlow/Powermate of what magnification? And how is it modified with a Lunt etalon? the train is composed by Baader D-ERF 100 mm free aperture --> Celestron 100ED with Baader focuser --> Lun...
by krakatoa1883
Fri Jun 04, 2021 11:44 am
Forum: This is SolarChat !!
Topic: The rapid evolution of AR12824-AR12826
Replies: 19
Views: 544

Re: The rapid evolution of AR12824-AR12826

Very interesting panels, the Sun is really like a living creature.
by krakatoa1883
Fri Jun 04, 2021 8:56 am
Forum: This is SolarChat !!
Topic: Heads Up 4th June
Replies: 19
Views: 615

Re: Heads Up 4th June

All great images, with lot of contrast.
by krakatoa1883
Fri Jun 04, 2021 8:54 am
Forum: This is SolarChat !!
Topic: Quick Session Tal/PST mod 2/6/21
Replies: 17
Views: 610

Re: Quick Session Tal/PST mod 2/6/21

It seems working fine, good images!
by krakatoa1883
Fri Jun 04, 2021 8:48 am
Forum: This is SolarChat !!
Topic: AR 12827-12829 - Halpha
Replies: 13
Views: 445

Re: AR 12827-12829 - Halpha

Thanks to all for your kind comments!
by krakatoa1883
Thu Jun 03, 2021 4:34 pm
Forum: This is SolarChat !!
Topic: AR 12827-12829 - Halpha
Replies: 13
Views: 445

AR 12827-12829 - Halpha

An inviting day for solar imaging with quite still air. AR12827 still looks interesting but seems now decayed compared to few days ago. In white light is disappointing but in H-alpha is a different object. Same for AR12829.

Modified Celestron XLT 100ED, ASI 178MM. Thanks for looking.
by krakatoa1883
Thu Jun 03, 2021 4:23 pm
Forum: This is SolarChat !!
Topic: 2021-06-02 - AR2827 in CaK
Replies: 15
Views: 452

Re: 2021-06-02 - AR2827 in CaK

Fine images, the structure of the penumbra has been well resolved.
by krakatoa1883
Thu Jun 03, 2021 4:18 pm
Forum: This is SolarChat !!
Topic: AR12827 Closeup in CaK 2nd June
Replies: 16
Views: 485

Re: AR12827 Closeup in CaK 2nd June

Great CaK images, among the best I've seen so far. Grain borders are very crisp.
by krakatoa1883
Thu Jun 03, 2021 4:16 pm
Forum: This is SolarChat !!
Topic: AR2827 and FDs 1st June 2021
Replies: 20
Views: 545

Re: AR2827 and FDs 1st June 2021

Fantastic work, Stu, the AR looks impressive!
by krakatoa1883
Sun May 30, 2021 9:57 am
Forum: This is SolarChat !!
Topic: AR2824 and AR2826 my contribution May 27, 2021
Replies: 16
Views: 425

Re: AR2824 and AR2826 my contribution May 27, 2021

Great image, Franco, very detailed. :bow
by krakatoa1883
Sun May 23, 2021 6:15 pm
Forum: This is SolarChat !!
Topic: Belated May 16th Ha Images
Replies: 13
Views: 365

Re: Belated May 16th Ha Images

Fine set of images, Brian.
by krakatoa1883
Sun May 23, 2021 6:13 pm
Forum: This is SolarChat !!
Topic: Brief Ar12824 Ha - 22nd May
Replies: 13
Views: 371

Re: Brief Ar12824 Ha - 22nd May

Excellent captures, Mark, very sharp!
by krakatoa1883
Mon May 17, 2021 3:14 pm
Forum: Solar Scope Modifications
Topic: The ubiquitous Celestron C6-R
Replies: 36
Views: 10803

Re: The ubiquitous Celestron C6-R

he let me know he had heard that re-spacing the C6-R objective to approximately 2.3 mm made an excellent CaK line telescope. very interesting info, thank you. Having re-spaced several refractors I would just like to add that those under f/10 require spacers to be of equal thickness within 0.05 mm o...
by krakatoa1883
Sun May 16, 2021 6:24 pm
Forum: This is SolarChat !!
Topic: Flare in Calcium II K 12th May
Replies: 22
Views: 616

Re: Flare in Calcium II K 12th May

Fine images, Nigella, congratulations. I always prefer the non-colorized CaK, but it's a matter of personal taste, of course.
by krakatoa1883
Sun May 16, 2021 6:20 pm
Forum: This is SolarChat !!
Topic: AR2822 May 15, 2021
Replies: 16
Views: 454

Re: AR2822 May 15, 2021

ffellah wrote: Sun May 16, 2021 2:26 pmI have been working on this three image mosaic of a AR2822 close up. This was done with the HaT and a Quark Combo at f/27.5: the seeing was good but borderline for high res.
great images, Franco, very crisp.
by krakatoa1883
Sat May 15, 2021 1:25 pm
Forum: This is SolarChat !!
Topic: Sol from the 12th of May 2021.
Replies: 7
Views: 199

Re: Sol from the 12th of May 2021.

A fine set of images, Eric, great work.
by krakatoa1883
Sat May 15, 2021 1:23 pm
Forum: This is SolarChat !!
Topic: Sol 26-4-21 Ha
Replies: 7
Views: 227

Re: Sol 26-4-21 Ha

Beautiful images, very detailed.
by krakatoa1883
Sat May 15, 2021 1:21 pm
Forum: This is SolarChat !!
Topic: Quark-Ha with 6" f8
Replies: 16
Views: 558

Re: Quark-Ha with 6" f8

A fine Quark, however, mine is not so good. Great images.
by krakatoa1883
Sat May 15, 2021 8:25 am
Forum: This is SolarChat !!
Topic: Lunt Ca-K 1800 diagonal, ZWO160mm, SW ED100 focus issue
Replies: 9
Views: 420

Re: Lunt Ca-K 1800 diagonal, ZWO160mm, SW ED100 focus issue

The focuser is this one steeltrack.jpg In the USA Baader products are sold by AlpineAstro, so you can order from this page https://alpineastro.com/collections/focusers/products/2-bds-rt-baader-diamond-steeltrack-focuser together with the adapter for SW tubes https://alpineastro.com/collections/focus...
by krakatoa1883
Fri May 14, 2021 8:40 pm
Forum: This is SolarChat !!
Topic: Lunt Ca-K 1800 diagonal, ZWO160mm, SW ED100 focus issue
Replies: 9
Views: 420

Re: Lunt Ca-K 1800 diagonal, ZWO160mm, SW ED100 focus issue

This is a well known problem of some (not all) SW ED refractors, a step inside the mobile tube that prevents inserting long 2" accessories. There is no solution other than replacing the focuser as I made with my own 100ED. I suggest a Baader Steeltrack focuser, this will solve the problem with ...
by krakatoa1883
Mon May 10, 2021 8:25 am
Forum: This is SolarChat !!
Topic: May 9th - Short Ha Session
Replies: 12
Views: 369

Re: May 9th - Short Ha Session

Fine images, Brian, very sharp indeed.
by krakatoa1883
Mon May 10, 2021 8:24 am
Forum: This is SolarChat !!
Topic: May 9 2021 Observations. C class flare!
Replies: 11
Views: 352

Re: May 9 2021 Observations. C class flare!

Thanks for your report, James, this morning I have seen another group developing in the south.
by krakatoa1883
Mon May 10, 2021 8:11 am
Forum: This is SolarChat !!
Topic: Sun images of May 9
Replies: 11
Views: 347

Re: Sun images of May 9

Thanks for your comments, much appreciated :) I should find the time to get my Lunt50 working again... so far I have adapted the Lunt PT to four refractors, Skywatcher 150/750, Tecnosky 115/800, Takahashi 90/500 and Celestron 100/900, all with 104 mm front D-ERF. The least satisfactory was the small...
by krakatoa1883
Sun May 09, 2021 1:15 pm
Forum: This is SolarChat !!
Topic: Ha-Sun May 7, 2021
Replies: 10
Views: 297

Re: Ha-Sun May 7, 2021

A dramatic view, Jozef, like a maelstrom in the chromosphere.
by krakatoa1883
Sun May 09, 2021 1:11 pm
Forum: This is SolarChat !!
Topic: 7th May FD CaK, HA and WL
Replies: 21
Views: 467

Re: 7th May FD CaK, HA and WL

Really great images, Nigella, CaK prominences came out particularly well, a very beautiful sight!
by krakatoa1883
Sun May 09, 2021 1:10 pm
Forum: SPoD Archive
Topic: Sun images of May 9
Replies: 5
Views: 356

Sun images of May 9

Seeing continues to be all but good, we are still waiting for an anticyclone (any would be good) that seems having no intention to arrive. Heavy storms are expected for the next three days so I have used at least this morning for taking few images in WL, CaK and H. AR12822 evolved to class C with 15...
by krakatoa1883
Sun May 09, 2021 1:10 pm
Forum: This is SolarChat !!
Topic: Sun images of May 9
Replies: 11
Views: 347

Sun images of May 9

Seeing continues to be all but good, we are still waiting for an anticyclone (any would be good) that seems having no intention to arrive. Heavy storms are expected for the next three days so I have used at least this morning for taking few images in WL, CaK and H. AR12822 evolved to class C with 15...
by krakatoa1883
Fri May 07, 2021 3:14 pm
Forum: This is SolarChat !!
Topic: Quick Screenshots 7th May
Replies: 16
Views: 436

Re: Quick Screenshots 7th May

Good captures, Nigella. I too love my 178MM.
by krakatoa1883
Fri May 07, 2021 3:09 pm
Forum: This is SolarChat !!
Topic: Sol from the 6th of May 2021.
Replies: 4
Views: 199

Re: Sol from the 6th of May 2021.

Great images, Eric. Not bad your seeing...
by krakatoa1883
Fri May 07, 2021 2:41 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Problem with Lunt 50
Replies: 46
Views: 4752

Re: Problem with Lunt 50

I want to understand this problem is common and what is the matter here. It's perfectly normal, all Lunt 50 scopes show a sweet spot, larger or smaller but is there. What matters are the extension and the position, it shall be large enough to tune the full disc and shall also be on or very close to...
by krakatoa1883
Fri Apr 23, 2021 4:39 pm
Forum: This is SolarChat !!
Topic: Animation - AR12816 Flare- new/improved...
Replies: 23
Views: 691

Re: Animation - AR12816 Flare

Fine animation, Stu, very sharp.
by krakatoa1883
Fri Apr 23, 2021 4:36 pm
Forum: This is SolarChat !!
Topic: halpha solar animation on 22 April
Replies: 3
Views: 180

Re: halpha solar animation on 22 April

Great animation, very interesting that solar material projecting out from the spicule layer just at the left of the main prom.
by krakatoa1883
Fri Apr 23, 2021 4:22 pm
Forum: This is SolarChat !!
Topic: The spectacular AR2817 today and AR2816 Ani
Replies: 15
Views: 592

Re: The spectacular AR2817 today and AR2816 Ani

Fantastic images, great work!
by krakatoa1883
Sun Apr 18, 2021 3:05 pm
Forum: This is SolarChat !!
Topic: AR12814 and AR12815 - April 17, 2021
Replies: 20
Views: 550

Re: AR12814 and AR12815 - April 17, 2021

Fine images, Franco, the setup seems working fine, just wait for a better seeing.

Lot of wires above your head, almost disturbing as the clouds :lol:
by krakatoa1883
Sat Apr 17, 2021 4:13 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20210417) | FD images (3 lights)
Replies: 9
Views: 362

Re: Today's SUN (20210417) | FD images (3 lights)

Excellent work, Pedro, very sharp discs.
by krakatoa1883
Sat Apr 17, 2021 4:08 pm
Forum: This is SolarChat !!
Topic: HA and Cak from yesterday 15th April.
Replies: 14
Views: 411

Re: HA and Cak from yesterday 15th April.

Fine images, Nigella, CaK proms have been captured really well!
by krakatoa1883
Fri Apr 16, 2021 4:52 pm
Forum: This is SolarChat !!
Topic: A tall flame and AR12814
Replies: 15
Views: 477

Re: A tall flame and AR12814

Simply go on ebay.com or Amazon and type "eyepiece focal reducer" in the search bar, otherwise you can find them from the usual dealers of eyepieces.
by krakatoa1883
Fri Apr 16, 2021 2:28 pm
Forum: This is SolarChat !!
Topic: A tall flame and AR12814
Replies: 15
Views: 477

Re: A tall flame and AR12814

Thanks for comments, much appreciated :) I wish I could figure out how to get full discs with my Coronado SMII 90. Doesn't anyone make an optical element to half the focal length hence the magnification? James, you can make use of a reducer like these below 05x.jpg screwed on the standard nose of my...
by krakatoa1883
Fri Apr 16, 2021 2:16 pm
Forum: This is SolarChat !!
Topic: Fridays Hi-Res Smorgasbord -16th April
Replies: 14
Views: 436

Re: Fridays Hi-Res Smorgasbord -16th April

I am really impressed by your Ca-K images, Mark, a very good result :bow It have the impression, however, that those taken through your TAL are more sharp than these.
by krakatoa1883
Thu Apr 15, 2021 9:48 am
Forum: This is SolarChat !!
Topic: A tall flame and AR12814
Replies: 15
Views: 477

Re: A tall flame and AR12814

Thanks for your comments. ) Did you upgrade the focuser on your Evoguide 50mm, as I understand it is a helical focuser. 2) Also the ASI178mm, I have not seen that used so much. It has small 2.4 um pixels. Did you focal reduce this to get to critical sampling as of : Hi Magnus, you can see the setup ...
by krakatoa1883
Wed Apr 14, 2021 3:00 pm
Forum: Solar Reference Library
Topic: April 14 Evolution ... Earth-Sun Scaling tutorial & Images
Replies: 21
Views: 2873

Re: April 14 Evolution ...

Very good images with much details in the spicule carpet, my Quark Chromo is not so good. Is the interference eliminator needed with the 174 ?
by krakatoa1883
Wed Apr 14, 2021 3:00 pm
Forum: Solar Reference Library
Topic: Earth-Sun Scaling tutorial & Images” written by “krakatoa1883
Replies: 22
Views: 3721

Re: April 14 Evolution ...

Very good images with much details in the spicule carpet, my Quark Chromo is not so good. Is the interference eliminator needed with the 174 ?
by krakatoa1883
Wed Apr 14, 2021 2:57 pm
Forum: This is SolarChat !!
Topic: a few minutes of happiness April 13
Replies: 12
Views: 391

Re: a few minutes of happiness April 13

Fantastic, Paul, great work!
by krakatoa1883
Wed Apr 14, 2021 2:55 pm
Forum: This is SolarChat !!
Topic: A tall flame and AR12814
Replies: 15
Views: 477

A tall flame and AR12814

Today a tall flame prominence is visible on the E limb, those who can shouldn't miss the view 2021-04-14-1026-Halpha-fulldisc proms.jpg AR12814 in the southern hemisphere is growing although it is still of class B, it's more interesting in H-alpha than in visible light. Another small region is devel...
by krakatoa1883
Sun Apr 11, 2021 1:18 pm
Forum: This is SolarChat !!
Topic: AR12814 in CaK - 11th April
Replies: 28
Views: 770

Re: AR12814 in CaK - 11th April

Fantastic CaK, Mark, the spicule layer and the proms are really impressive, do you process them separately from the disc ?
by krakatoa1883
Sun Apr 11, 2021 1:15 pm
Forum: This is SolarChat !!
Topic: Ca II K and Ha FDs 9th April 2021
Replies: 8
Views: 317

Re: Ca II K and Ha FDs 9th April 2021

Great discs, Stu, well captured filament.
by krakatoa1883
Sun Apr 11, 2021 11:53 am
Forum: Solar Scope Modifications
Topic: Red glass inside Lunt LS50THa
Replies: 8
Views: 2596

Re: Red glass inside Lunt LS50THa

Agree, want to remove it because is mounted in a barrel slightly larger than 2" that can't be inserted in the 2" focuser of the receiving scope and therefore requires an extension, this put the etalon in the wrong position. If I remove the barrel I can solve the problem.
by krakatoa1883
Sat Apr 10, 2021 5:06 pm
Forum: Solar Scope Modifications
Topic: Red glass inside Lunt LS50THa
Replies: 8
Views: 2596

Re: Red glass inside Lunt LS50THa

Thank you very much for your answers, my concern was about not to damage the etalon.
by krakatoa1883
Fri Apr 09, 2021 3:44 pm
Forum: Solar Scope Modifications
Topic: Red glass inside Lunt LS50THa
Replies: 8
Views: 2596

Red glass inside Lunt LS50THa

I am looking for the transmission characteristics of the red glass which is in front of the etalon assembly of my Lunt 50 pressure tuning module but I couldn't find anything, I suppose it is an internal ERF or something like that. I wonder if I can use the PT module without this red glass when there...