Search found 666 matches

by GreatAttractor
Sat Nov 28, 2020 8:00 pm
Forum: SPoD Archive
Topic: First Light 180 Maksutov AR2786 28/11/2020
Replies: 10
Views: 13

Re: First Light 180 Maksutov AR2786 28/11/2020

Wonderful images!

My former Mak 180 gave me the best photos (non-Hα) overall so far (inluding WL: img1, img2), I haven't yet been able to find out if the current RC8 stands up to it in white light.
by GreatAttractor
Sun Oct 25, 2020 7:51 pm
Forum: This is SolarChat !!
Topic: Zoom Meeting - Any Interest
Replies: 63
Views: 1677

Re: Zoom Meeting - Any Interest

Very nice meeting indeed, see you all next time!
by GreatAttractor
Sun Oct 25, 2020 9:16 am
Forum: This is SolarChat !!
Topic: First CaK results
Replies: 4
Views: 148

First CaK results

I'm learning how to use my newly acquired Lunt CaK module (straight-through, B600). So far tried with my 90/660 mm Celestron achromat and with the GSO RC8 (with Aries ERF). Unfortunately there was literally nothing on the Sun at the time of capture, but the image quality seems promising (all from th...
by GreatAttractor
Fri Sep 11, 2020 8:42 am
Forum: This is SolarChat !!
Topic: Competition Winner- Alexandra
Replies: 37
Views: 817

Re: Competition Winner- Alexandra

Congratulations! That's a great image.
by GreatAttractor
Wed Sep 09, 2020 11:00 pm
Forum: Sunlit Earth
Topic: Mars rotation
Replies: 3
Views: 167

Mars rotation

My GSO RC8 does OK also in planetary imaging:
mars8.gif
mars8.gif (279.45 KiB) Viewed 167 times
23 minutes, 3-minute intervals, PGR Chameleon 3 mono (ICX445) + Baader Red 610 nm long-pass filter, @f/16.

The small bulge in the upper right is the Olympus Mons.
by GreatAttractor
Thu Sep 03, 2020 3:41 pm
Forum: Solar Scope Modifications
Topic: PST Mod and TEC140
Replies: 9
Views: 469

Re: PST Mod and TEC140

As I understand, Merlin meant the configuration without any Barlows; in that case, the f/7 beam from your 140 mm, f = 980 mm 'scope would be only used by the PST as an f/10 beam (because of clipping), having f = 980 mm and D eff. = 98 mm.
by GreatAttractor
Sat Aug 22, 2020 6:07 am
Forum: Solar Scope Modifications
Topic: Lunt LS50THa modification to 200 mm aperture
Replies: 10
Views: 3722

Re: Lunt LS50THa modification to 200 mm aperture

I managed to stack something! Due to mediocre seeing it's still rather a teaser than a proper first light, but I got fine structures never seen with my setups before:
out_B16.png
out_B16.png (372.3 KiB) Viewed 453 times
by GreatAttractor
Wed Aug 19, 2020 5:11 pm
Forum: This is SolarChat !!
Topic: Solar granulation with C14HD full aperture 2020.08.19
Replies: 14
Views: 402

Re: Solar granulation with C14HD full aperture

Excellent images! Out of interest, where did you get the solar film? I needed some ND 3.8 recently, but the biggest I saw were A4 sheets. WoW! I think that is the biggest scope I have ever seen an amateur put to solar use. I think Dr. Hänssgen wins with his 42" Dobsonian ;) http://www.cruxis.com/sco...
by GreatAttractor
Wed Aug 19, 2020 5:11 pm
Forum: SPoD Archive
Topic: Solar granulation with C14HD full aperture
Replies: 11
Views: 170

Re: Solar granulation with C14HD full aperture

Excellent images! Out of interest, where did you get the solar film? I needed some ND 3.8 recently, but the biggest I saw were A4 sheets. WoW! I think that is the biggest scope I have ever seen an amateur put to solar use. I think Dr. Hänssgen wins with his 42" Dobsonian ;) http://www.cruxis.com/sco...
by GreatAttractor
Wed Aug 19, 2020 7:10 am
Forum: This is SolarChat !!
Topic: H-alpha session 9 August, 130 f/7
Replies: 13
Views: 379

Re: H-alpha session 9 August, 130 f/7

That's a great animation.

Imgalt is a bit of a blast from the past ;) Try ImPPG, it has the same function (Tools/Align image sequence...), and more besides.
by GreatAttractor
Thu Aug 13, 2020 7:59 pm
Forum: Solar Scope Modifications
Topic: Lunt LS50THa modification to 200 mm aperture
Replies: 10
Views: 3722

Re: Lunt LS50THa modification to 200 mm aperture

After a short (ahem) break I'm continuing with the mod. I had nice sunny weather this weekend and did some further tests. I was afraid I may experience thermal issues like Marty with his Newtonian — since I also don't have a corrector plate nor a front meniscus (if that's what makes the difference);...
by GreatAttractor
Sat Aug 01, 2020 4:30 pm
Forum: This is SolarChat !!
Topic: What is the definition of, "Hi Resolution"
Replies: 15
Views: 522

Re: What is the definition of, "Hi Resolution"

In my post by "resolution" I meant: smallest resolvable features assuming optimal sampling rate (i.e., Barlow + pixel size combination) and very good seeing.
by GreatAttractor
Fri Jul 31, 2020 9:03 pm
Forum: This is SolarChat !!
Topic: What is the definition of, "Hi Resolution"
Replies: 15
Views: 522

Re: What is the definition of, "Hi Resolution"

high res to one person is higher than what they have ever imaged before :) Right, something along these lines. A few years ago I considered all those PST and Lunt 35-60 images "low-res", and anything from 80 mm up "hi-res". Since having advanced to a 90 mm Hα setup myself I now consider it "mid-res...
by GreatAttractor
Fri Jul 24, 2020 6:18 am
Forum: Solar Software
Topic: ImPPG 0.6.2 - Russian and Ukrainian translations
Replies: 8
Views: 744

Re: ImPPG 0.6.2 - Russian and Ukrainian translations

In case there are any error messages/pop-ups after you unzip the downloaded file and then try to run imppg.exe, please post them here.
by GreatAttractor
Thu Jul 23, 2020 5:20 pm
Forum: Solar Software
Topic: ImPPG 0.6.2 - Russian and Ukrainian translations
Replies: 8
Views: 744

Re: ImPPG 0.6.2 - Russian and Ukrainian translations

Hi Terry, Here's the Releases page: https://github.com/GreatAttractor/imppg/releases You want the latest (v. 0.6.2) imppg-win64.zip file: https://github.com/GreatAttractor/imppg/releases/download/v0.6.2/imppg-win64.zip On first start, the language is set to English (or to Polish/Russian/Ukrainian, i...
by GreatAttractor
Thu Jul 16, 2020 6:44 am
Forum: Sunlit Earth
Topic: Jupiter, Rotation Animation.
Replies: 7
Views: 436

Re: Jupiter, Rotation Animation.

Looks great - and with nice consistent seeing. Was it a color camera with an atmospheric dispersion corrector?
by GreatAttractor
Mon Jul 13, 2020 6:04 pm
Forum: This is SolarChat !!
Topic: Sun in Ha and Ca II K plus beautiful eruptive prom 12th July 2020
Replies: 19
Views: 757

Re: Sun in Ha and Ca II K plus beautiful eruptive prom 12th July 2020

The animation is wonderful. It's a dive with a splash!
by GreatAttractor
Sun Jul 12, 2020 6:44 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Lunt CaK module vs. refractor baffles
Replies: 0
Views: 443

Lunt CaK module vs. refractor baffles

I'm thinking of dipping my toes into CaK imaging using a Lunt CaK diagonal. One of the telescopes used would be my Celestron 90/660 mm achromat, without an additional ERF. It has a few internal baffles (blackened) - should I be concerned? - when pointing the 'frac at the solar limb, the light cone c...
by GreatAttractor
Mon Jul 06, 2020 4:17 pm
Forum: This is SolarChat !!
Topic: C11 HA + CAK Imaging - Got rid of reflected light!!
Replies: 21
Views: 1061

Re: C11 HA + CAK Imaging - Got rid of reflected light!!

Got it, thank you. Makes sense — the reflection was off-center, so if you move the camera further back, it finally moves outside the FOV. (And the magnification stays the same, because PM is telecentric.) Good to know, I was also considering PM 2.5x for a configuration I have a mind.
by GreatAttractor
Mon Jul 06, 2020 7:00 am
Forum: This is SolarChat !!
Topic: C11 HA + CAK Imaging - Got rid of reflected light!!
Replies: 21
Views: 1061

Re: C11 HA + CAK Imaging - Got rid of reflected light!!

So what's changed in the setup? The PowerMate is now after the diagonal instead of before?
by GreatAttractor
Sun Jul 05, 2020 9:14 am
Forum: Solar Software
Topic: ImPPG 0.6.2 - Russian and Ukrainian translations
Replies: 8
Views: 744

ImPPG 0.6.2 - Russian and Ukrainian translations

Thanks to Rusłan there are now Russian and Ukrainian translations:
imppg_ru.png
imppg_ru.png (144.49 KiB) Viewed 744 times
Version 0.6.2 can be downloaded from: https://github.com/G.../imppg/releases
by GreatAttractor
Sat Jun 27, 2020 7:58 am
Forum: This is SolarChat !!
Topic: Lunt 40mm Dedicated Hydrogen-Alpha Solar Telescope
Replies: 38
Views: 1575

Re: Lunt 40mm Dedicated Hydrogen-Alpha Solar Telescope

Amazing. I absolutely loved my Lunt 35 — and 6 years ago it was ~$700!
by GreatAttractor
Sun Jun 21, 2020 8:11 pm
Forum: Solar Reference Library
Topic: Solar Animation Tutorial (June 2020)
Replies: 10
Views: 896

Re: Solar Animation Tutorial (June 2020)

I haven't seen this one before, but yes, it looks like the cubic interpolation shader isn't executing exactly how it should on your setup. I'm guessing the saved processed images look the same though for both back ends? Could you send me the stack and ImPPG settings file so I can check on my system?
by GreatAttractor
Sun Jun 21, 2020 9:30 am
Forum: Solar Reference Library
Topic: Solar Animation Tutorial (June 2020)
Replies: 10
Views: 896

Re: Solar Animation Tutorial (June 2020)

Great tutorial, Stu! As for coloring the whole animation in GIMP, I've read there are scripts to automate it (i.e apply Curves/other operations to all layers), but haven't got around to trying it. I noticed you have "CPU + bitmaps" mode enabled in your ImPPG screenshot. Do you get an error message o...
by GreatAttractor
Tue Jun 09, 2020 7:45 pm
Forum: This is SolarChat !!
Topic: Max recommended duration of video capture to freeze small scale details?
Replies: 9
Views: 400

Re: Max recommended duration of video capture to freeze small scale details?

For my captures using the 90 mm telescope (effective f = 1056 mm, image scale 0.73"/pix) I settled on 15-second videos (depending on the ROI size, 450-680 frames). For time lapses, I take 15-second videos with 30-second breaks. On the disc my setup requires 0.7-1.3 ms shutter, for fainter prominence...