Search found 433 matches

by LTHB
Sun Sep 24, 2023 9:20 am
Forum: This is SolarChat !!
Topic: h-alpha, September 22nd, 2023
Replies: 6
Views: 760

Re: h-alpha, September 22nd, 2023

Thanks for the feedback, Chris! You may have a point, the images come across a bit dark when I am revisiting them one day later! My intention was to keep exposure and gain low enough not to saturate too much of the flaring AR. Feel free to post your versions here, if you like! I always find it inter...
by LTHB
Sat Sep 23, 2023 9:07 pm
Forum: This is SolarChat !!
Topic: h-alpha, September 22nd, 2023
Replies: 6
Views: 760

h-alpha, September 22nd, 2023

After long weeks without a chance for solar imaging yesterday a break in the cloud cover in late afternoon. The sun was much too low on the horizon already for high res, but GONG showed AR13443 flaring, so I gave it a try. l managed one acceptable disk, plus some by-catch from the local airport. htt...
by LTHB
Mon Jul 10, 2023 7:58 pm
Forum: This is SolarChat !!
Topic: 10 Juli Sunspots and AR's.
Replies: 23
Views: 1834

Re: 10 Juli Sunspots and AR's.

Very nice captures! I cannot spot any Newton rings either.

Best regards,

Frank
by LTHB
Mon Jul 10, 2023 7:56 pm
Forum: This is SolarChat !!
Topic: h-alpha, July 8th, 2023
Replies: 6
Views: 455

Re: h-alpha, July 8th, 2023

Thanks for the kind words!

Best regards,

Frank
by LTHB
Sun Jul 09, 2023 11:10 am
Forum: This is SolarChat !!
Topic: h-alpha, July 8th, 2023
Replies: 6
Views: 455

h-alpha, July 8th, 2023

I had some sun yesterday, but unfortunately transparency wasn't good. Still I wanted to take a look at AR13363 in its glory. I hope the weather will cooperate in the next days! https://live.staticflickr.com/65535/53033345461_b393698dcf_o.jpg https://live.staticflickr.com/65535/53033739550_f2fd6207fc...
by LTHB
Fri Jun 30, 2023 8:12 pm
Forum: This is SolarChat !!
Topic: AR13354 across the spectrum 29th June 2023
Replies: 30
Views: 1451

Re: AR13354 across the spectrum 29th June 2023

A terrific set of images! I was clouded out the last days, so I had no chance to see the big sunspot, but looking at these images makes up for that.

Thanks for showing!

Frank
by LTHB
Fri Jun 30, 2023 8:06 pm
Forum: This is SolarChat !!
Topic: AR3355 in very good seeing condition - Ha and OIII - Mewlon 250 - June 29th
Replies: 23
Views: 1252

Re: AR3355 in very good seeing condition - Ha and OIII - Mewlon 250 - June 29th

Fantastic images! The distorted granulation indeed fits the white plages on Stu's fine CaK image viewtopic.php?t=41514 quite nicely. Thanks for showing!

Frank
by LTHB
Wed Jun 28, 2023 4:33 pm
Forum: This is SolarChat !!
Topic: h-alpha, June 25th, 2023
Replies: 6
Views: 344

Re: h-alpha, June 25th, 2023

Thanks, Alexandra, Mark and Arne!

Best regards,

Frank
by LTHB
Sun Jun 25, 2023 9:09 pm
Forum: This is SolarChat !!
Topic: h-alpha, June 25th, 2023
Replies: 6
Views: 344

h-alpha, June 25th, 2023

Two quick shots from this afternoon. Seeing was o.k., but lots of clouds passing through and transparency not really good. Still nice when the weather cooperates at least a bit when I have some time to spend in the sun at the weekend. https://live.staticflickr.com/65535/53000460687_fcf640e214_o.jpg ...
by LTHB
Thu Jun 22, 2023 7:05 pm
Forum: This is SolarChat !!
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 25
Views: 1238

Re: h-alpha, June 18th, 2023, M class flare

Thanks for the SPoD!

And by the way: I've added four more images to the sequence.

Frank
by LTHB
Thu Jun 22, 2023 7:03 pm
Forum: This is SolarChat !!
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 25
Views: 1238

Re: h-alpha, June 18th, 2023, M class flare

I'm hoping for the best for you, Valery!

Best regards,

Frank
by LTHB
Tue Jun 20, 2023 7:18 pm
Forum: SPoD Archive
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 21
Views: 1585

Re: h-alpha, June 18th, 2023, M class flare

I edited my original post, adding four more images (plus UT time stamps), so that now the development of the flare over a little more than two hours can be followed.

Best regards,

Frank
by LTHB
Tue Jun 20, 2023 7:18 pm
Forum: This is SolarChat !!
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 25
Views: 1238

Re: h-alpha, June 18th, 2023, M class flare

I edited my original post, adding four more images (plus UT time stamps), so that now the development of the flare over a little more than two hours can be followed.

Best regards,

Frank
by LTHB
Tue Jun 20, 2023 6:13 pm
Forum: SPoD Archive
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 21
Views: 1585

Re: h-alpha, June 18th, 2023, M class flare

:) Thanks Arne, Franco, Warren, James, Maurits, Mark, Valery and Aaron! Valery, longtime users of SolarChat may well know that my high resolution solar scope is a Mewlon 210, equipped with a trusty ARIES DERF, but it can't hurt to mention it once in a while... :) (Hoping for those who started solar ...
by LTHB
Tue Jun 20, 2023 6:13 pm
Forum: This is SolarChat !!
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 25
Views: 1238

Re: h-alpha, June 18th, 2023, M class flare

:) Thanks Arne, Franco, Warren, James, Maurits, Mark, Valery and Aaron! Valery, longtime users of SolarChat may well know that my high resolution solar scope is a Mewlon 210, equipped with a trusty ARIES DERF, but it can't hurt to mention it once in a while... :) (Hoping for those who started solar ...
by LTHB
Tue Jun 20, 2023 5:43 pm
Forum: SPoD Archive
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 21
Views: 1585

Re: h-alpha, June 18th, 2023, M class flare

GreatAttractor wrote: Mon Jun 19, 2023 11:20 am Great shots!
What was the telescope & filter used?
Thanks, Filip! The setup is a Mewlon 210, ARIES DERF, Daystar Quantum filter, double-stacked with Lunt LS35.

Best regards,

Frank
by LTHB
Tue Jun 20, 2023 5:43 pm
Forum: This is SolarChat !!
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 25
Views: 1238

Re: h-alpha, June 18th, 2023, M class flare

GreatAttractor wrote: Mon Jun 19, 2023 11:20 am Great shots!
What was the telescope & filter used?
Thanks, Filip! The setup is a Mewlon 210, ARIES DERF, Daystar Quantum filter, double-stacked with Lunt LS35.

Best regards,

Frank
by LTHB
Mon Jun 19, 2023 8:41 am
Forum: SPoD Archive
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 21
Views: 1585

Re: h-alpha, June 18th, 2023, M class flare

Thanks for the friendly feedback everyone!

I've added a coloured version of the flare images.

@James: The time stamps of the three flare images are 13-51-15, 14-20-20 and 14-53-55 UTC.

Best regards,

Frank
by LTHB
Mon Jun 19, 2023 8:41 am
Forum: This is SolarChat !!
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 25
Views: 1238

Re: h-alpha, June 18th, 2023, M class flare

Thanks for the friendly feedback everyone!

I've added a coloured version of the flare images.

@James: The time stamps of the three flare images are 13-51-15, 14-20-20 and 14-53-55 UTC.

Best regards,

Frank
by LTHB
Sun Jun 18, 2023 11:36 pm
Forum: SPoD Archive
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 21
Views: 1585

h-alpha, June 18th, 2023, M class flare

The sky was a bit hazy this afternoon, but the seeing looked good to excellent, good enough certainly to bring out the high resolution gear. I captured AR13333 and AR13338 first. https://live.staticflickr.com/65535/52984788560_78e4d4cc57_o.jpg https://live.staticflickr.com/65535/52984870693_c1bbe6d3...
by LTHB
Sun Jun 18, 2023 11:36 pm
Forum: This is SolarChat !!
Topic: h-alpha, June 18th, 2023, M class flare
Replies: 25
Views: 1238

h-alpha, June 18th, 2023, M class flare

The sky was a bit hazy this afternoon, but the seeing looked good to excellent, good enough certainly to bring out the high resolution gear. I captured AR13333 and AR13338 first. https://live.staticflickr.com/65535/52984788560_78e4d4cc57_o.jpg https://live.staticflickr.com/65535/52984870693_c1bbe6d3...
by LTHB
Mon Jun 12, 2023 12:46 pm
Forum: This is SolarChat !!
Topic: Closeups from 06-10-2023
Replies: 20
Views: 797

Re: Closeups from 06-10-2023

MAURITS wrote: Sun Jun 11, 2023 11:05 am
LTHB wrote: Sun Jun 11, 2023 10:52 am Fabulous images, Maurits! We have been imaging almost the same regions at about the same time!

Best regards,

Frank
Hey Frank, do you have your images here?
Yep! Here: viewtopic.php?t=41196
by LTHB
Mon Jun 12, 2023 12:44 pm
Forum: This is SolarChat !!
Topic: h-alpha, June 10th, 2023
Replies: 8
Views: 339

Re: h-alpha, June 10th, 2023

rigel123 wrote: Sun Jun 11, 2023 2:01 pm Wonderful shots Frank! Can you describe your setup?

Mewlon 210, ARIES DERF, Daystar Quantum filter, double-stacked with Lunt LS35, Apollo-M camera.

Best regards,

Frank
by LTHB
Mon Jun 12, 2023 12:41 pm
Forum: This is SolarChat !!
Topic: h-alpha, June 10th, 2023
Replies: 8
Views: 339

Re: h-alpha, June 10th, 2023

Thanks everybody for the kind words!

Frank
by LTHB
Sun Jun 11, 2023 10:59 am
Forum: This is SolarChat !!
Topic: Double-stack Ha images with the Mewlon 250 on May 26 and 27
Replies: 16
Views: 731

Re: Double-stack Ha images with the Mewlon 250 on May 26 and 27

Fantastic images, as usual, Christian! The Mewlon is terrific!

I didn't know that Baader has 290mm DERFs. I asked them for a DERF for my Mewlon 210 a couple of years ago with no success. Fortunately I could then get one from Valery.

Best regards,

Frank
by LTHB
Sun Jun 11, 2023 10:52 am
Forum: This is SolarChat !!
Topic: Closeups from 06-10-2023
Replies: 20
Views: 797

Re: Closeups from 06-10-2023

Fabulous images, Maurits! We have been imaging almost the same regions at about the same time!

Best regards,

Frank
by LTHB
Sun Jun 11, 2023 10:46 am
Forum: This is SolarChat !!
Topic: h-alpha, June 10th, 2023
Replies: 8
Views: 339

h-alpha, June 10th, 2023

Weather has been fine last week and fortunately I had time for a few short imaging sessions, but not for processing. So I am sitting on a TB or so of data waiting to be processed. I managed to do yesterday's best three images at least, and also couldn't resist to play a little with color. https://li...
by LTHB
Fri Mar 10, 2023 10:14 pm
Forum: This is SolarChat !!
Topic: h-alpha, March 7th, 2023
Replies: 8
Views: 224

Re: h-alpha, March 7th, 2023

Thanks for the friendly words!

Best regards,

Frank
by LTHB
Wed Mar 08, 2023 8:40 pm
Forum: This is SolarChat !!
Topic: h-alpha, March 7th, 2023
Replies: 8
Views: 224

h-alpha, March 7th, 2023

Some gaps between fast moving clouds yesterday, so after three weeks of clouds a welcome opportunity to spend an hour imaging. Transparency wasn't good, so no great contrast in the close-up views, but seeing was ok. https://live.staticflickr.com/65535/52734808444_29f9138700_o.jpg https://live.static...
by LTHB
Sat Feb 18, 2023 10:37 am
Forum: This is SolarChat !!
Topic: Dr Peter Zetner
Replies: 32
Views: 1601

Re: Dr Peter Zetner

This is very sad news.

When Peter showed up on SC from time to time, generously sharing his extremely fascinating projects and his vast knowledge or giving friendly advice, he always had very interesting things to say. He will be greatly missed.

Frank
by LTHB
Fri Feb 17, 2023 10:13 am
Forum: This is SolarChat !!
Topic: h-alpha, February 15th, 2023
Replies: 11
Views: 333

Re: h-alpha, February 15th, 2023

Thanks for the friendly feedback, everyone! Valery, my setup is the same as last year that has been sitting on my shelf unused for months: Mewlon 210, my trusty ARIES DERF, Daystar Quantum filter, double-stacked with a Lunt LS35, Apollo-M camera. (The Daystar's wavelength setting unit still needs an...
by LTHB
Wed Feb 15, 2023 10:00 pm
Forum: This is SolarChat !!
Topic: h-alpha, February 15th, 2023
Replies: 11
Views: 333

h-alpha, February 15th, 2023

Second day in a row with an hour of sunny sky! Some thin clouds, so not too good contrast, but quite good seeing, so time to check if the high resolution gear is still working after the long winter. https://live.staticflickr.com/65535/52691720410_8437446df5_o.jpg https://live.staticflickr.com/65535/...
by LTHB
Wed Feb 15, 2023 9:51 pm
Forum: This is SolarChat !!
Topic: h-alpha, February 14th, 2023
Replies: 8
Views: 239

Re: h-alpha, February 14th, 2023

Thanks, guys!
by LTHB
Wed Feb 15, 2023 10:41 am
Forum: This is SolarChat !!
Topic: h-alpha, February 14th, 2023
Replies: 8
Views: 239

h-alpha, February 14th, 2023

Yesterday afternoon I had the first few hours of blue sky after months and months of dense cloud cover. So I dusted off the h-alpha scope, tried to recall how my imaging gear works, and although the sun is still low on the horizon, I finally got at least a disk and a few close-up shots. Quite a lot ...
by LTHB
Sun Nov 27, 2022 1:11 pm
Forum: This is SolarChat !!
Topic: From Valery. Kherson liberation.
Replies: 24
Views: 893

Re: From Valery. Kherson liberation.

That's great news, Valery! I hope you can return to a life in security and freedom in the not too distant future!

Best regards,

Frank
by LTHB
Sun Aug 21, 2022 11:24 am
Forum: This is SolarChat !!
Topic: Solar images with the 300 mm Newtonian / OIII filter
Replies: 23
Views: 904

Re: Solar images with the 300 mm Newtonian / OIII filter

Superb images, as usual!

Frank
by LTHB
Sun Aug 21, 2022 11:20 am
Forum: This is SolarChat !!
Topic: Belated h-alpha images, July 19th, 2022
Replies: 7
Views: 345

Re: Belated h-alpha images, July 19th, 2022

Thanks everybody for the friendly words and comments (and sorry for the late reply - I've been very busy workwise)! No weather for imaging around here today, so I processed some more from July 19th: https://live.staticflickr.com/65535/52300515043_1914e3a47a_o.jpg https://live.staticflickr.com/65535/...
by LTHB
Mon Aug 15, 2022 9:49 pm
Forum: This is SolarChat !!
Topic: Belated h-alpha images, July 19th, 2022
Replies: 7
Views: 345

Belated h-alpha images, July 19th, 2022

On the last day before my holidays I had an afternoon of fine weather with long stretches of splendid seeing. The videos have been sitting on my hard drive since then, and as the weather has not allowed for imaging in the last days, I started to process the videos from July 19th. The first two, AR13...
by LTHB
Mon Jul 18, 2022 10:22 am
Forum: This is SolarChat !!
Topic: h-alpha, July 13th, 2022
Replies: 6
Views: 281

Re: h-alpha, July 13th, 2022

Thanks, Maurits, Mark and Peter!

Best regards,

Frank
by LTHB
Mon Jul 18, 2022 10:20 am
Forum: SPoD Archive
Topic: 13 July: An assortment of H alpha images.
Replies: 18
Views: 1044

Re: 13 July: An assortment of H alpha images.

Thanks, Peter, for the detailed explanation and the helpful three-pane image! Your term „worminess“ is spot-on! My attempts to sharpen high resolution h-alpha images so far come out either too wormy, like this one: https://live.staticflickr.com/65535/52224412534_cb6a2c88f9_o.jpg or too soft, like th...
by LTHB
Mon Jul 18, 2022 10:20 am
Forum: This is SolarChat !!
Topic: 13 July: An assortment of H alpha images.
Replies: 18
Views: 552

Re: 13 July: An assortment of H alpha images.

Thanks, Peter, for the detailed explanation and the helpful three-pane image! Your term „worminess“ is spot-on! My attempts to sharpen high resolution h-alpha images so far come out either too wormy, like this one: https://live.staticflickr.com/65535/52224412534_cb6a2c88f9_o.jpg or too soft, like th...
by LTHB
Sun Jul 17, 2022 6:54 pm
Forum: This is SolarChat !!
Topic: h-alpha, July 11th, 2022
Replies: 20
Views: 626

Re: h-alpha, July 11th, 2022

Unexpectedly I could take a few videos this afternoon before the haze thickened too much. Not enough time and conditions not stable enough for systematic tests, but I decided to just try shifting the tuning of the Quantum and the LS35 a bit to the red based on my estimation described above and see w...
by LTHB
Sun Jul 17, 2022 11:47 am
Forum: SPoD Archive
Topic: 13 July: An assortment of H alpha images.
Replies: 18
Views: 1044

Re: 13 July: An assortment of H alpha images.

Wonderful images, Peter, thanks for showing! I find the side-by-side comparison of on-band and -1A images extremely instructive and helpful! I am still struggling with the exact tuning of my own h-alpha setup (as you may have noticed from my images from July 11th). On Wednesday I have imaged the ver...
by LTHB
Sun Jul 17, 2022 11:47 am
Forum: This is SolarChat !!
Topic: 13 July: An assortment of H alpha images.
Replies: 18
Views: 552

Re: 13 July: An assortment of H alpha images.

Wonderful images, Peter, thanks for showing! I find the side-by-side comparison of on-band and -1A images extremely instructive and helpful! I am still struggling with the exact tuning of my own h-alpha setup (as you may have noticed from my images from July 11th). On Wednesday I have imaged the ver...
by LTHB
Sun Jul 17, 2022 11:03 am
Forum: This is SolarChat !!
Topic: h-alpha, July 13th, 2022
Replies: 6
Views: 281

h-alpha, July 13th, 2022

Some belated images of three of the active regions from Wednesday, a bit in the blue wing of the h-alpha line, as I have learned from Valery and Mark and Peter in the meantime. (I'll work on that...) https://live.staticflickr.com/65535/52219672756_cb8ab0e8db_o.jpg AR13055 https://live.staticflickr.c...
by LTHB
Sun Jul 17, 2022 10:45 am
Forum: This is SolarChat !!
Topic: Saturdays Ha Selection 16th july
Replies: 19
Views: 584

Re: Saturdays Ha Selection 16th july

Wonderful selection, Mark, really the best of what was on display! (I have also been imaging for a while yesterday. Afterwards I looked at GONG a saw that I had missed the big prom...)

Best regards,

Frank
by LTHB
Sun Jul 17, 2022 10:24 am
Forum: This is SolarChat !!
Topic: h-alpha, July 11th, 2022
Replies: 20
Views: 626

Re: h-alpha, July 11th, 2022

I have just perused Christian‘s useful website to check if I can estimate how far off band my images probably are. According to one plot there the CẂL shift of a mica-spaced etalon at focal ratio 35 (11.5 for the Mewlon, a factor 3 for the telecentric) should be roughly -0.15A. The central obstructi...
by LTHB
Sun Jul 17, 2022 8:24 am
Forum: This is SolarChat !!
Topic: h-alpha, July 11th, 2022
Replies: 20
Views: 626

Re: h-alpha, July 11th, 2022

Thanks for the detailed instructions, Valery! I‘ll try that at the next opportunity. Unfortunately I‘ll need a long stretch of clear blue sky for this, as every change of the Quantum‘s temperature setting takes quite a long time - around 15min until the status LED shows green light again. But hopefu...
by LTHB
Thu Jul 14, 2022 10:03 am
Forum: This is SolarChat !!
Topic: h-alpha, July 11th, 2022
Replies: 20
Views: 626

Re: h-alpha, July 11th, 2022

Thanks, Stu! Valery, thanks a lot for your hints and suggestions for improvement, very much appreciated! I still cannot tell just by looking at the images if they are a bit off-band or not, like you can, but you are surely right. Three months ago I‘ve spent quite a bit of time trying to tune the Qua...
by LTHB
Wed Jul 13, 2022 7:27 pm
Forum: This is SolarChat !!
Topic: h-alpha, July 11th, 2022
Replies: 20
Views: 626

Re: h-alpha, July 11th, 2022

Thanks Peter, Valery and Arne! Valery, the setup for the high resolution is a Mewlon 210 with ARIES D-ERF, 3xTelecentric, Daystar Quantum 0.5A, LS35 etalon, PlayerOne Apollo-M. For the other images I use a Sky-90 with two old double-stacked Coronado SM90 filters, ASI290 respectively ASI178 (for the ...