Search found 592 matches

by GreatAttractor
Tue Mar 12, 2019 6:48 pm
Forum: This is SolarChat !!
Topic: A Grand Post-Processing Thread!
Replies: 9
Views: 226

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: 226

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: 129

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: 4718

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: 672

Re: ImPPG version 0.5.4

Have fun, everyone!

And don't forget to check out the new improved "About ImPPG..." dialog ;)
by GreatAttractor
Tue Feb 05, 2019 7:11 pm
Forum: Solar Software
Topic: ImPPG version 0.5.4
Replies: 15
Views: 672

ImPPG version 0.5.4

Main page: http://greatattractor.github.io/imppg/ Download from: https://github.com/GreatAttractor/imppg/releases/tag/v0.5.4 As requested by one of the users, ImPPG now has: New features Configurable look of the tone curve editor Enhancements Last loaded settings file name shown in toolbar All color...
by GreatAttractor
Thu Jan 24, 2019 7:54 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: What camera?
Replies: 23
Views: 1087

Re: What camera?

Good luck with the setup, Alexandra.
PS here is a piccie of the Celestron with the Aries ERF finally fitted
This is shaping up to be a very interesting season!
by GreatAttractor
Thu Nov 22, 2018 8:05 pm
Forum: This is SolarChat !!
Topic: Citizen Science
Replies: 24
Views: 1495

Re: Citizen Science

Hi Stu, I love the idea. Here are some of mine, technical details are in the Astrobin descriptions. Sunspot animations in white light: https://astrob.in/23205/D/rawthumb/gallery/get.jpg?insecure https://astrob.in/41790/0/rawthumb/gallery/get.jpg?insecure Flare in The Monster (spectacular loops, but ...
by GreatAttractor
Sun Sep 23, 2018 11:20 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Grasshopper3 how to ??
Replies: 8
Views: 622

Re: Grasshopper3 how to ??

You need something like this: Baader C-Mount/1.25" adapter, then you can plop the camera into any telescope. FireCapture should work fine for video acquisition.
by GreatAttractor
Sat Sep 08, 2018 7:36 am
Forum: Solar Scope Modifications
Topic: Lunt LS50THa modification to 200 mm aperture
Replies: 7
Views: 747

Re: Lunt LS50THa modification to 200 mm aperture

Back focus = distance from the rear of the OTA to the OTA's focal plane. Etalons, telecentrics etc. need to be inside this distance. RC has quite a lot, SCT somewhat less, and adding a focal reducer moves the focal plane in, so reduces back focus.
by GreatAttractor
Fri Sep 07, 2018 3:11 pm
Forum: Solar Scope Modifications
Topic: Lunt LS50THa modification to 200 mm aperture
Replies: 7
Views: 747

Re: Lunt LS50THa modification to 200 mm aperture

I would fear the back focus would be insufficient (Lunt 50 needs some ~180 mm). With an SCT it would be easier to simply attach a PST (which works at f/10).
by GreatAttractor
Thu Sep 06, 2018 8:17 pm
Forum: Solar Scope Modifications
Topic: Lunt LS50THa modification to 200 mm aperture
Replies: 7
Views: 747

Lunt LS50THa modification to 200 mm aperture

I present my latest Hα mod, consisting of a GSO Ritchey-Chretien 8" + Aries 214 mm ERF + Lunt 50 etalon assembly. I completed it back in June, but unfortunately haven't had conditions and time for an imaging session yet (beside basic testing). I'm planning on putting it to good use next year. The mo...
by GreatAttractor
Fri Jul 27, 2018 12:25 pm
Forum: This is SolarChat !!
Topic: CBSAP shutting down September 1st
Replies: 27
Views: 2173

Re: CBSAP shutting down September 1st

Stephen, thank you for the priceless popularization and outreach work you've done.
I'm sure the Solarchatters can keep this wonderful forum running.
by GreatAttractor
Thu Jul 12, 2018 8:32 pm
Forum: This is SolarChat !!
Topic: Imppg file type question
Replies: 2
Views: 336

Re: Imppg file type question

Hi Don, ImPPG is for post-processing still images (stacks made with e.g. AutoStakkert!3) and alignment of images for a time lapse. For stabilizing a video like this you'd have to convert it to a series of frames. It'll be easier to use PIPP . But if you meant to stack this video, just feed it direct...
by GreatAttractor
Thu Jul 05, 2018 2:55 pm
Forum: This is SolarChat !!
Topic: SUN 20180703 animated gif
Replies: 17
Views: 837

Re: SUN 20180703 animated gif

Excellent result and great details.
Question: I have problems finding a program to align the single frames. I have tried Registax5 and 6 but none of them will align my images.
Try ImPPG, menu Tools/Align image sequence....
by GreatAttractor
Mon Jun 04, 2018 7:58 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: New polarized light sensor
Replies: 0
Views: 731

New polarized light sensor

I got an e-mail from FLIR about the new polarized light sensor from Sony (implying upcoming new cameras, I guess), IMX250MZR. Found some infographics: https://thinklucid.com/tech-briefs/polarization-explained-sony-polarized-sensor/ In short, every pixel has an individual polarizer; pixels are divide...
by GreatAttractor
Sun Jun 03, 2018 2:37 pm
Forum: This is SolarChat !!
Topic: AR12709 remnants close up in the Ca II K line.
Replies: 15
Views: 1157

Re: AR12709 remnants close up in the Ca II K line.

That's a great "diamond dust", Valery!

TheSkyBurner, that's an interesting comparison indeed.
by GreatAttractor
Sun Jun 03, 2018 10:04 am
Forum: This is SolarChat !!
Topic: Sunday Sun 3rd June_RCT_Ha
Replies: 12
Views: 863

Re: Sunday Sun 3rd June_RCT_Ha

Great resolution, Stu. I love the looks of the setup too.
by GreatAttractor
Mon May 28, 2018 9:20 am
Forum: This is SolarChat !!
Topic: Advice on Firecapture/FLIR Spinnaker SDK ?
Replies: 12
Views: 944

Re: Advice on Firecapture/FLIR Spinnaker SDK ?

Thanks for verifying this, Lou. I'll check the Spinnaker out and see about adding the support to PlanetaryImager (my Chameleon3 should work with Spinnaker according to the PGR website).
by GreatAttractor
Sun May 27, 2018 9:46 am
Forum: This is SolarChat !!
Topic: Advice on Firecapture/FLIR Spinnaker SDK ?
Replies: 12
Views: 944

Re: Advice on Firecapture/FLIR Spinnaker SDK ?

That's strange, I'd think all cameras should still be supported by FlyCapture SDK. Did you try accessing the camera via the FlyCapture's application FlyCap?
by GreatAttractor
Thu May 17, 2018 11:48 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Newton Rings and CCD Fringing
Replies: 4
Views: 1053

Re: Newton Rings and CCD Fringing

Mark, could you specify you Chameleon3's model number? My CM3-U3-13S2M-CS (sensor: ICX445) doesn't show rings in any of my Hα setups (Omega Optical, Lunt 35, Lunt 50 and their mods, Barlowed or not).
by GreatAttractor
Mon May 14, 2018 5:20 pm
Forum: This is SolarChat !!
Topic: Moat flow
Replies: 4
Views: 506

Moat flow

I was checking arxiv.org today and if I'm not mistaken, the outflow around a sunspot's penumbra (granules spreading outward over a limited range from the penumbra), something I noticed back in 2012 in my WL animations, e.g. here: https://astrob.in/23205/D/rawthumb/gallery/get.jpg?insecure is probabl...
by GreatAttractor
Mon May 14, 2018 4:46 pm
Forum: This is SolarChat !!
Topic: AR12708 in H-a and at 655nm 280mm
Replies: 6
Views: 543

Re: AR12708 in H-a and at 655nm 280mm

Cracking shots, Valery! The seeing was unfortunately unusable for me.
by GreatAttractor
Mon May 14, 2018 4:45 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Omega Optical CaH filter
Replies: 6
Views: 1441

Re: Omega Optical CaH filter

Thank you everyone for input. CaK imaging is a plan for the future anyway, it's Hα for me right now.
by GreatAttractor
Sat May 12, 2018 8:00 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Omega Optical CaH filter
Replies: 6
Views: 1441

Omega Optical CaH filter

I was browsing through Omega Optical filters on Ebay and noticed this:

Optical Filter Astronomy 396.9SC0.2 Ca H filter 1.25"

(full description: link)

CaH with 2 Å bandwidth and 90% transmission for $300. Seems promising, what do you think?