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Transit of Mercury in the Spicule Layer. Phil took this great image with his Quantum 6 Scope, Solar Spectrum etalon and PGR Camera.

Welcome to Solar Chat! The best forum for Solar Astronomy
Moving forward from solar cycle 24 to 25

Search found 612 matches

by GreatAttractor
Wed Dec 11, 2019 7:10 am
Forum: This is SolarChat !!
Topic: Introduction and small question
Replies: 10
Views: 97

Re: Introduction and small question

JochenM wrote:
Wed Dec 11, 2019 4:32 am
I have the Moonlite CM-Mini fitted instead. I'm guessing that pretty much covers that?
Yup. This just leaves pointing the telescope possibly a bit sideways and finding the best camera position/orientation.
by GreatAttractor
Tue Dec 10, 2019 9:58 pm
Forum: This is SolarChat !!
Topic: Introduction and small question
Replies: 10
Views: 97

Re: Introduction and small question

Hello Jochem, welcome to Solarchat! I can see two (not very serious) issues in your image: - drooping focuser (most likely); the on-band FOV area ("sweet spot") should be more or less central, but you have it shifted downwards; you can read about it here: https://solarchatforum.com/viewtopic.php?t=1...
by GreatAttractor
Mon Dec 09, 2019 9:55 pm
Forum: This is SolarChat !!
Topic: Introducing myself
Replies: 20
Views: 200

Re: Introducing myself

Hello Salvo, enjoy the forum!
by GreatAttractor
Sun Nov 24, 2019 9:22 am
Forum: Solar Scope Modifications
Topic: "Magic" distance of Lunt LS50PT etalon from focal plane?
Replies: 15
Views: 287

Re: "Magic" distance of Lunt LS50PT etalon from focal plane?

Roel80 wrote:
Sat Nov 23, 2019 12:02 pm
That 140mm is measured from the focal plane to which part of the etalon unit?
I suggest you measure it precisely yourself. Here's a simple method I used: viewtopic.php?f=9&t=19238
by GreatAttractor
Sat Nov 02, 2019 10:34 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 3D printing and SHG
Replies: 15
Views: 481

Re: 3D printing and SHG

And here's a successful build of the LOWSPEC spectroscope (in Polish): https://astropolis.pl/topic/68522-wydru ... ektroskop/
First light: https://astropolis.pl/topic/69238-widmo ... o%C5%9Bci/
by GreatAttractor
Sun Oct 20, 2019 5:27 pm
Forum: Solar Software
Topic: Stackistry: algorithms summary
Replies: 0
Views: 288

Stackistry: algorithms summary

With a small (2-year) delay, I've finally added a description of algorithms used by Stackistry/libskry (an open-source cross-platform stacker):

link to PDF
toc.png
toc.png (104.55 KiB) Viewed 288 times
by GreatAttractor
Wed Sep 11, 2019 5:53 am
Forum: This is SolarChat !!
Topic: First animation with the Intes
Replies: 13
Views: 481

Re: First animation with the Intes

Thanks, Bart, glad you like it.

As for your setup - this is with a PST etalon, correct? So the Intes can manage the required 200 mm backfocus, or is it some other approach?
by GreatAttractor
Tue Sep 10, 2019 4:31 pm
Forum: This is SolarChat !!
Topic: First animation with the Intes
Replies: 13
Views: 481

Re: First animation with the Intes

Great result, the high resolution is immediately noticeable.
by GreatAttractor
Wed Aug 28, 2019 5:01 pm
Forum: This is SolarChat !!
Topic: Weekend Sunshine and OaCapture testing for Apple
Replies: 13
Views: 579

Re: Weekend Sunshine and OaCapture testing for Apple

I wrote the FlyCapture (i.e. "native" PGR) and IIDC drivers for PlanetaryImager (IIDC a.k.a. DC1394 is a universal protocol supported by all PGR's USB cameras). Marco (PlanetaryImager's author) does publish macOS builds (.dmg files) in the Downloads section, but likely they do not have FlyCapture su...
by GreatAttractor
Wed Aug 28, 2019 4:48 pm
Forum: This is SolarChat !!
Topic: Prom Animation 25th August '19_Colour Added
Replies: 27
Views: 964

Re: Prom Animation 25th August '19_Colour Added

What a catch, Stu. Super-thick curtain blowing in the (solar) wind.
by GreatAttractor
Wed Aug 28, 2019 4:48 pm
Forum: SPoD Archive
Topic: Prom Animation 25th August '19_Colour Added
Replies: 22
Views: 800

Re: Prom Animation 25th August '19_Colour Added

What a catch, Stu. Super-thick curtain blowing in the (solar) wind.
by GreatAttractor
Fri Jun 28, 2019 6:06 am
Forum: Solar Software
Topic: IMPGG tutorial
Replies: 3
Views: 743

Re: IMPGG tutorial

Have a look at Jason's video covering his ImPPG process:

https://www.youtube.com/watch?v=0LpiVFcabbo

There are also a few tutorial links (non-video though) on the home page: https://greatattractor.github.io/imppg/
by GreatAttractor
Sun Jun 23, 2019 7:28 am
Forum: This is SolarChat !!
Topic: Anybody want to share their unprocessed source AVIs
Replies: 32
Views: 1452

Re: Anybody want to share their unprocessed source AVIs

Starry Jack wrote:
Sat Jun 22, 2019 1:54 pm
Because I am greedy (not really) if you have a post processed version of those files and steps well take those as well,
Done - uploaded raw stacks, processed images and ImPPG settings files for each.

My approach:
example1.png
example1.png (143.51 KiB) Viewed 336 times
example3.png
example3.png (83.03 KiB) Viewed 336 times
example2.png
example2.png (198.23 KiB) Viewed 336 times
by GreatAttractor
Sat Jun 22, 2019 11:45 am
Forum: This is SolarChat !!
Topic: Prom Animation Wed 19th
Replies: 12
Views: 594

Re: Prom Animation Wed 19th

Great animation, Stu. Too bad there wasn't a larger prom to capture, but the detailed spicule action is great.
by GreatAttractor
Sat Jun 22, 2019 11:42 am
Forum: This is SolarChat !!
Topic: Anybody want to share their unprocessed source AVIs
Replies: 32
Views: 1452

Re: Anybody want to share their unprocessed source AVIs

Hi Jack,

I'll upload some AVIs overnight. Of course I don't store full material from each time lapse session (100-200 GB), but I keep 1-2 best videos for future experiments.

UPDATE: already uploaded, have fun.
by GreatAttractor
Tue Jun 18, 2019 5:31 pm
Forum: This is SolarChat !!
Topic: small animations of June 17
Replies: 14
Views: 705

Re: small animations of June 17

Wonderful animations. Plasma rain blowing in the wind.
by GreatAttractor
Fri Apr 26, 2019 4:22 pm
Forum: This is SolarChat !!
Topic: Lunt 50mm question
Replies: 18
Views: 844

Re: Lunt 50mm question

I have a Borg helical focuser and a custom T2/C-mount low-profile adapter, see the second picture in this thread: viewtopic.php?t=18394
by GreatAttractor
Mon Mar 25, 2019 6:02 pm
Forum: This is SolarChat !!
Topic: ladies and gentleman the ultimate animation of March 24
Replies: 16
Views: 798

Re: ladies and gentleman the ultimate animation of March 24

Perfect! Those boiling ARs at the limb are the best.
by GreatAttractor
Mon Mar 25, 2019 6:02 pm
Forum: SPoD Archive
Topic: ladies and gentleman the ultimate animation of March 24
Replies: 11
Views: 826

Re: ladies and gentleman the ultimate animation of March 24

Perfect! Those boiling ARs at the limb are the best.
by GreatAttractor
Mon Mar 25, 2019 7:13 am
Forum: Solar Software
Topic: New version of ImPPG
Replies: 6
Views: 678

Re: New version of ImPPG

Alexandra, which Windows version do you use?
Did you perhaps unpack ImPPG to a folder containing the previous version? If so, try unpacking to a fresh folder and running from there.
by GreatAttractor
Tue Mar 12, 2019 6:48 pm
Forum: This is SolarChat !!
Topic: A Grand Post-Processing Thread!
Replies: 9
Views: 597

Re: A Grand Post-Processing Thread!

I think I learned about the L-R deconvolution from Michael Wilkinson on SGL forum. It seemed like a straightforward enough (and fun) to implement method, and at that time I needed something more convenient than R6 for batch processing. The tutorial links on ImPPG's homepage should be useful. In the ...
by GreatAttractor
Mon Mar 11, 2019 9:03 pm
Forum: This is SolarChat !!
Topic: A Grand Post-Processing Thread!
Replies: 9
Views: 597

Re: A Grand Post-Processing Thread!

Bruce, it is my understanding that for (our) solar imaging, when sharpening a stack, we need to remove the blurriness caused by 1) atmospheric turbulence (even though the stacker tries to choose the sharpest image fragments, it has to use some blurrier ones too), and 2) shift-and-add procedure (whic...
by GreatAttractor
Fri Mar 08, 2019 8:56 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Periodic table of sensors
Replies: 2
Views: 488

Periodic table of sensors

FLIR (formerly Point Grey) have made a “periodic table” of camera sensors with data on 120 models “from classic CCDs to the latest CMOS technology”: https://2.bp.blogspot.com/-H7FKWkZdizQ/XBp6DZM9dtI/AAAAAAAAXyw/euZLBSLxkJ4IiaQbNPrcEMTbbZIMLE8jgCLcBGAs/s640/Periodic%2BTable%2Bof%2BSensors.png Direct...
by GreatAttractor
Fri Mar 01, 2019 5:58 pm
Forum: Solar Scope Modifications
Topic: lunt 50 mod
Replies: 35
Views: 7452

Re: lunt 50 mod

even the Lunt 50, like the Lunt 60., seems to have a objective with single lens Hmm, interesting. Where does the image come from? I just double-checked my specimen (purchased in 2015) and it seems to have a doublet. I mean I didn't disassemble it, but it shows two upright minified reflections of my...
by GreatAttractor
Thu Feb 07, 2019 9:24 pm
Forum: Solar Software
Topic: ImPPG version 0.5.4
Replies: 15
Views: 1517

Re: ImPPG version 0.5.4

Have fun, everyone!

And don't forget to check out the new improved "About ImPPG..." dialog ;)