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.

Very nice meeting indeed, see you all next time!

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...

Congratulations! That's a great image.

My GSO RC8 does OK also in planetary imaging:
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.

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.

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:

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...

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...

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.

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);...

In my post by "resolution" I meant: smallest resolvable features assuming optimal sampling rate (i.e., Barlow + pixel size combination) and very good seeing.

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...

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.

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...

Looks great - and with nice consistent seeing. Was it a color camera with an atmospheric dispersion corrector?

The animation is wonderful. It's a dive with a splash!

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...

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.

So what's changed in the setup? The PowerMate is now after the diagonal instead of before?

Thanks to Rusłan there are now Russian and Ukrainian translations:
Version 0.6.2 can be downloaded from: https://github.com/G.../imppg/releases

Amazing. I absolutely loved my Lunt 35 — and 6 years ago it was ~$700!

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?

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...

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...