Search found 156 matches

by LTHB
Thu May 21, 2020 11:55 pm
Forum: This is SolarChat !!
Topic: May 21 AR and Proms in H alpha
Replies: 11
Views: 125

Re: May 21 AR and Proms in H alpha

Terrific details when viewed in full resolution! This looks like you had really good seeing! What was the exposure time?
by LTHB
Thu May 21, 2020 11:47 pm
Forum: This is SolarChat !!
Topic: h-alpha, May 21st, 2020
Replies: 7
Views: 68

h-alpha, May 21st, 2020

Probably the last day of a stretch of good weather for a while today, if the forecast is correct, so I shot the decaying active regions while I can. A one-shot disk: https://live.staticflickr.com/65535/49920594593_39523cccf8_o.jpg A two-pane mosaic (the seam still showing - I have to improve my flat...
by LTHB
Thu May 21, 2020 5:35 pm
Forum: This is SolarChat !!
Topic: 21May - C11 HA/CAK Close-ups - Images added 23 May 20
Replies: 33
Views: 481

Re: 21May - C11 HA/CAK Close-ups

Nice h-alpha shot with good resolution! As for CaK: Another way to solve the barlow problem (although a bit more expensive than buying a Powermate) would be to change the camera to an ASI290, which has a pixel size almost exactly half of that of the ASI174 (and is less noisy) and drop the barlow/pow...
by LTHB
Thu May 21, 2020 5:17 pm
Forum: This is SolarChat !!
Topic: May 20 CaK disc and H-alpha proms
Replies: 23
Views: 277

Re: May 20 CaK disc and H-alpha proms

dmund Optics has a 393nm/10nmFWHM filter with very good transmission in CaK that I am using in combination with a blue CCD filter and a KG-3 IR blocker. thanks for your suggestion. I have found a 394 nm, suppose is the same ? https://www.edmundoptics.eu/f/hard-coated-od-4-10nm-bandpass-filters/1383...
by LTHB
Thu May 21, 2020 12:07 pm
Forum: This is SolarChat !!
Topic: May 20 CaK disc and H-alpha proms
Replies: 23
Views: 277

Re: May 20 CaK disc and H-alpha proms

Nice images, CaK as well as the AR in h-alpha! I've never succeeded to capture proms in CaK so far - yours are really bright and clear! If you are still looking for CaK-filter options: My experience with the Baader blue CCD-filter is not that good, my copy has about 35% transmission in CaK. Much bet...
by LTHB
Thu May 21, 2020 11:34 am
Forum: This is SolarChat !!
Topic: Ha Full Disk 20th May
Replies: 9
Views: 104

Re: Ha Full Disk 20th May

Nice disk, Mark! I find it amazing again and again what you are doing with 50mm, teasing out the level of resolution that this disk shows!
by LTHB
Thu May 21, 2020 11:16 am
Forum: This is SolarChat !!
Topic: h-alpha, May 19th, 2020
Replies: 9
Views: 93

Re: h-alpha, May 19th, 2020

Thanks everybody! Alexandra, thanks for the link! I'm using Gimp to stitch the panes together by hand. When I tried to do a mosaic half a year or so ago I spent an afternoon or two to try out several softwares, but nothing really worked, so I ended up with Gimp. The mosaic above, however, puts toget...
by LTHB
Thu May 21, 2020 10:48 am
Forum: This is SolarChat !!
Topic: h-alpha, May 20th, 2020
Replies: 4
Views: 49

h-alpha, May 20th, 2020

Seeing conditions not great, but okay, same weather as in the last days, so enough gaps in the clouds for a few captures to see how the active regions are doing. A full disk: https://live.staticflickr.com/65535/49919071511_2e225eeffd_o.jpg Zooming in a little: https://live.staticflickr.com/65535/499...
by LTHB
Wed May 20, 2020 10:18 am
Forum: This is SolarChat !!
Topic: h-alpha, May 19th, 2020
Replies: 9
Views: 93

h-alpha, May 19th, 2020

Okay seeing (fluctuating around 2-3 arcseconds) and some clouds here yesterday, but with enough gaps in between, so I tried to zoom in on the active regions as far as I could get with 90mm. First a one-shot disk (full resolution here: https://live.staticflickr.com/65535/49915863017_7797439f51_o.jpg ...
by LTHB
Tue May 12, 2020 8:21 am
Forum: This is SolarChat !!
Topic: Full disk 11-05-2020
Replies: 5
Views: 82

Re: Full disk 11-05-2020

A nice disk! And I'm also hoping for more exciting things to see in the coming months!
by LTHB
Tue May 12, 2020 8:18 am
Forum: This is SolarChat !!
Topic: h-alpha, May 10th, 2020
Replies: 11
Views: 150

Re: h-alpha, May 10th, 2020

Thanks everybody!

Frank
by LTHB
Tue May 12, 2020 8:17 am
Forum: This is SolarChat !!
Topic: h-alpha, May 11th, 2020
Replies: 5
Views: 97

h-alpha, May 11th, 2020

Once more only a quick shot through the gaps between clouds, again almost nothing going on on the solar surface.

Image

Kind regards,

Frank
by LTHB
Sun May 10, 2020 7:40 pm
Forum: This is SolarChat !!
Topic: h-alpha, May 10th, 2020
Replies: 11
Views: 150

h-alpha, May 10th, 2020

Just a quick shot through thin clouds, no better resolution possible today.

Image

Kind regards,

Frank
by LTHB
Sun May 10, 2020 6:18 pm
Forum: This is SolarChat !!
Topic: 9th May 2020
Replies: 24
Views: 259

Re: 9th May 2020

Terrific animation! Looks like it took lots of time processing, but, as Jochen said, definitely worth it!
by LTHB
Sun May 10, 2020 10:22 am
Forum: This is SolarChat !!
Topic: Experiments With the Airylab 2.7x Telecentric 9th May
Replies: 28
Views: 488

Re: Experiments With the Airylab 2.7x Telecentric 9th May

Interesting observation, thanks! I don't have the AiryLab telecentric, but I'll try the Baader 3x telecentric if my CaK gear is up an running again.
by LTHB
Sun May 10, 2020 9:33 am
Forum: This is SolarChat !!
Topic: First DS image
Replies: 18
Views: 265

Re: First DS image

This looks like a great first light! Did you apply a flat? If not, that it a really good unit!
by LTHB
Sun May 10, 2020 9:29 am
Forum: This is SolarChat !!
Topic: h-alpha, May 9th, 2020
Replies: 9
Views: 134

Re: h-alpha, May 9th, 2020

Thanks, guys!

Dan, it's an old Coronado SM90, double stacked.
by LTHB
Sat May 09, 2020 10:44 pm
Forum: This is SolarChat !!
Topic: h-alpha, May 9th, 2020
Replies: 9
Views: 134

h-alpha, May 9th, 2020

Nice weather here today, some stretches of decent seeing, but lots of clouds by the time I had my solar gear out. The few gaps didn't allow an extended session, but at least a disk and one close-up of the chain of filaments: https://live.staticflickr.com/65535/49875875226_8f3b2f1bf1_o.jpg https://li...
by LTHB
Sat May 09, 2020 9:59 pm
Forum: This is SolarChat !!
Topic: Proms and 'surface' in Ha May 9th '20
Replies: 12
Views: 199

Re: Proms and 'surface' in Ha May 9th '20

The structure of the disturbed region comes out very nice! Beautiful set of images!
by LTHB
Sat May 09, 2020 9:44 am
Forum: This is SolarChat !!
Topic: Which is the right High-Resolution CAK image
Replies: 18
Views: 289

Re: Which is the right High-Resolution CAK image

Hi Alfred, I've been struggeling with the same question - see the thread linked by Raf and also https://solarchatforum.com/viewtopic.php?f=4&t=24905 -, with no clear answer so far. At the moment I am adding fans to my scope to make sure my videos are not spoiled by thermal air currents. When that is...
by LTHB
Tue May 05, 2020 8:52 am
Forum: This is SolarChat !!
Topic: Monday Sunshine 4th May
Replies: 11
Views: 254

Re: Monday Sunshine 4th May

Nice session! The prom shot is great, good resolution and beautiful colouring!

Frank
by LTHB
Tue May 05, 2020 8:44 am
Forum: This is SolarChat !!
Topic: GREAT SHOW today (04.05.2020) with Solar Refractor 228mm
Replies: 14
Views: 298

Re: GREAT SHOW today with Solar Refractor 228mm

Breathtaking! And not just the big prom, but also the spicule layer below!

Frank
by LTHB
Sun May 03, 2020 12:08 pm
Forum: This is SolarChat !!
Topic: h-alpha, May 2nd, 2020
Replies: 6
Views: 230

Re: h-alpha, May 2nd, 2020

Thanks for your comments, Jochen and Mark! The second etalon is also an old pre-Meade unit I bought second hand. The two etalons are, however, very different: One very even, requiring almost no tilt, but not very narrow. The other one needs quite a bit of tilt (and shows uneven brightness - images d...
by LTHB
Sun May 03, 2020 10:50 am
Forum: Sunlit Earth
Topic: Arvo Sunset
Replies: 6
Views: 497

Re: Arvo Sunset

Marvelous pictures - thanks for sharing!

Frank
by LTHB
Sun May 03, 2020 10:47 am
Forum: This is SolarChat !!
Topic: Full disk 02-05-2020
Replies: 11
Views: 308

Re: Full disk 02-05-2020

Very nice disks, bringing out every surface detail very clearly!

Frank