Search found 306 matches

by LTHB
Mon Mar 01, 2021 12:46 pm
Forum: This is SolarChat !!
Topic: h-alpha and CaK, February 26th, 2021
Replies: 4
Views: 52

Re: h-alpha and CaK, February 26th, 2021

Thanks, Mark!
by LTHB
Mon Mar 01, 2021 12:44 pm
Forum: Sunlit Earth
Topic: Moon, February 27th, 2021
Replies: 5
Views: 38

Moon, February 27th, 2021

Having seen all these pretty moon pictures here I decided I had to give it a try myself. Capturing the full moon was pretty easy, and stitching together a mosaic quickly with ImageCompositeEditor worked for the first time for me (it never did with solar mosaics). I found sharpening quite a challenge...
by LTHB
Sun Feb 28, 2021 3:16 pm
Forum: This is SolarChat !!
Topic: h-alpha and CaK, February 24th, 2021
Replies: 11
Views: 99

Re: h-alpha and CaK, February 24th, 2021

Thanks everybody! I had one more spring day on Friday, but now it's mostly clouds again.

But then one of the fun things about SC is that there is always somebody somewhere in the world with clear skies who posts solar images to look at!
by LTHB
Sun Feb 28, 2021 3:09 pm
Forum: This is SolarChat !!
Topic: Saturday Sunshine and Another New Scope - 27th February
Replies: 12
Views: 141

Re: Saturday Sunshine and Another New Scope - 27th February

Nice images! The recent additions to your scope and etalon collection seem to work brilliantly, the DS90 has a very even field. The CaK looks great at full resolution. Looks like you are well prepared for the solar activity to get going!
by LTHB
Sun Feb 28, 2021 2:54 pm
Forum: This is SolarChat !!
Topic: h-alpha and CaK, February 26th, 2021
Replies: 4
Views: 52

h-alpha and CaK, February 26th, 2021

Quite nice spring weather on Friday, so I could follow how the active groups develop. I started with CaK, and by the time I had the h-alpha scope out, the seeing had deteriorated a bit. First a disk in h-alpha for overview (I forgot to shoot a disk in CaK...) and then a closer look at the active reg...
by LTHB
Thu Feb 25, 2021 11:15 pm
Forum: This is SolarChat !!
Topic: h-alpha and CaK, February 24th, 2021
Replies: 11
Views: 99

h-alpha and CaK, February 24th, 2021

Spring has begun suddenly and unusually early in the year for northern Germany, with mild temperatures and quite a bit of sun in the afternoons, so I could capture videos in h-alpha and CaK for an hour. The seeing wasn't good enough for high resolution images, but I got full disks and close-ups of t...
by LTHB
Thu Feb 25, 2021 10:40 pm
Forum: This is SolarChat !!
Topic: Granulation and AR12804 in WL
Replies: 7
Views: 76

Re: Granulation and AR12804 in WL

Beautifully captured sunspot group and amazing resolution in the granulation for 150mm aperture!
by LTHB
Thu Feb 25, 2021 10:34 pm
Forum: This is SolarChat !!
Topic: Sun 25th February 2021
Replies: 14
Views: 156

Re: Sun 25th February 2021

Some nice disks and proms! I also like the soft, almost feathery look of the orange h-alpha sun.
by LTHB
Tue Feb 23, 2021 8:10 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Testing a Lunt LS50FHa etalon with a H spectrum tube.
Replies: 14
Views: 400

Re: Testing a Lunt LS50FHa etalon with a H spectrum tube.

Very interesting, thanks, Peter!

I probably want to try testing with a hydrogen tube when I find some time in the next months. A question, if I may: Which software are you using for evaluating the images? (The plots look like it might be ImageJ?)

Regards,

Frank
by LTHB
Tue Feb 23, 2021 7:58 am
Forum: This is SolarChat !!
Topic: h-alpha, February 22nd, 2021
Replies: 6
Views: 87

h-alpha, February 22nd, 2021

Hazy sky in the afternoon over here, but somehow h-alpha still works, even if contrast is reduced considerably (while CaK doesn't work at all). https://live.staticflickr.com/65535/50970723787_fb40e08846_o.jpg https://live.staticflickr.com/65535/50969918003_de0f3a877b_o.jpg Kind regards, Frank
by LTHB
Tue Feb 23, 2021 7:52 am
Forum: This is SolarChat !!
Topic: CaK, Sunday 22nd, 2021
Replies: 7
Views: 82

Re: CaK, Sunday 22nd, 2021

P.S.: I just noted that I probably shouldn't post when I'm overworked: The date should be February, 21st, which was Sunday...
by LTHB
Tue Feb 23, 2021 7:48 am
Forum: This is SolarChat !!
Topic: CaK, Sunday 22nd, 2021
Replies: 7
Views: 82

Re: CaK, Sunday 22nd, 2021

Thank you, everybody! And thanks for the SPoD!

Frank
by LTHB
Sun Feb 21, 2021 11:29 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Daystar Quantum tuning question
Replies: 15
Views: 287

Re: Daystar Quantum tuning question

Thanks for the information, Bob! After reading on Christians website and taking some clues from the Zoom meeting I think I'll get a hydrogen discharge tube. This should give me a reliable basis for evaluating the etalon instead of (more or less) educated guesses.
by LTHB
Sun Feb 21, 2021 11:20 pm
Forum: This is SolarChat !!
Topic: CaK, Sunday 22nd, 2021
Replies: 7
Views: 82

CaK, Sunday 22nd, 2021

The best of a bunch of CaK videos this afternoon resulted in this:

Image

Kind regards,

Frank
by LTHB
Sun Feb 21, 2021 11:20 pm
Forum: SPoD Archive
Topic: CaK, Sunday 22nd, 2021
Replies: 5
Views: 51

CaK, Sunday 22nd, 2021

The best of a bunch of CaK videos this afternoon resulted in this:

Image

Kind regards,

Frank
by LTHB
Sun Feb 21, 2021 11:13 pm
Forum: This is SolarChat !!
Topic: h-alpha, February 19th, 2021
Replies: 7
Views: 67

Re: h-alpha, February 19th, 2021

Thanks, folks!
by LTHB
Sun Feb 21, 2021 8:12 pm
Forum: This is SolarChat !!
Topic: Zoom Meeting - 21 February @ 18:00 UT
Replies: 74
Views: 1399

Re: Zoom Meeting - 21 February @ 18:00 UT

I can only agree! I enjoyed the meeting very much - very inspiring, a panel of experts to learn from. Thanks to Alexandra and Brian for setting this up!
by LTHB
Sat Feb 20, 2021 3:31 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: A New Spectroheliograph
Replies: 10
Views: 240

Re: A New Spectroheliograph

Extremely cool project! Thanks for showing!

Frank
by LTHB
Sat Feb 20, 2021 3:24 pm
Forum: This is SolarChat !!
Topic: h-alpha, February 19th, 2021
Replies: 7
Views: 67

h-alpha, February 19th, 2021

Some h-alpha from yesterday. The close-up shots are probably a bit overprocessed - I was trying to bring out the structure of the filaments. https://live.staticflickr.com/65535/50962623486_6eda15b14a_o.jpg https://live.staticflickr.com/65535/50961912483_4131984510_o.jpg https://live.staticflickr.com...
by LTHB
Sat Feb 20, 2021 8:51 am
Forum: This is SolarChat !!
Topic: Zoom Meeting - 21 February @ 18:00 UT
Replies: 74
Views: 1399

Re: Zoom Meeting - 21 February @ 18:00 UT

I'd like to join in tomorrow, so please count me in!

Frank
by LTHB
Thu Feb 18, 2021 10:05 pm
Forum: This is SolarChat !!
Topic: The Furry Calcium Chromosphere and Playing With New Toys - 18th February
Replies: 18
Views: 235

Re: The Furry Calcium Chromosphere and Playing With New Toys - 18th February

Terrific CaK shot, Mark! And it sounds like you'll be having lots of fun with the new SM90 filter!
by LTHB
Sun Feb 14, 2021 8:18 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Daystar Quantum tuning question
Replies: 15
Views: 287

Re: Daystar Quantum tuning question

Thanks for this terrific information, Bob! Actually, I had missed the thread on hydrogen spectum tubes, great idea! It sounds like a project for the next holidays! (Although there is already the SolEx project that Christian posted...) David, I like the idea of a piece of gear travelling literally al...
by LTHB
Sun Feb 14, 2021 1:10 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Daystar Quantum tuning question
Replies: 15
Views: 287

Re: Daystar Quantum tuning question

Thanks, Rainer! I read the depressing story of your Daystar filter - makes it somewhat hard to recommend Daystar products. I had in fact not planned to buy a Daystar Quantum, but after some reading here on SC and other forums had decided that SolarSpectrum was clearly the better option. However, my ...
by LTHB
Sat Feb 13, 2021 12:29 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Daystar Quantum tuning question
Replies: 15
Views: 287

Re: Daystar Quantum tuning question

Thanks, Christian and Mark! Christian, that sounds plausible! The air temperature was a little below 0°C yesterday, which probably makes it not easier to reach the reference temperature. So I'll ignore the green light of the LED for the tests and wait at least 20min after each change of the settings...
by LTHB
Sat Feb 13, 2021 10:35 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Daystar Quantum tuning question
Replies: 15
Views: 287

Daystar Quantum tuning question

Yesterday I had an afternoon of clear sky, so I experimented with the settings of my new toy, a used Daystar Quantum 0.5A. (It's been sitting on my shelf for more than half a year, so the bad weather period coming with new gear is over...) It takes quite a long time to reach working temperature afte...