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...

Well done!
I suggest shorter time intervals next time (30 s - 1 minute) for smoother motion.

Excellent details. I read somewhere that the life span of a convection cell is around 20 minutes. Would it be interesting to make a time lapse ? Of course! Strongly recommended. Things start to get interesting from ~127 mm of aperture. https://astrob.in/23205/0/rawthumb/gallery/get.jpg?insecure htt...

Hello, Alan, and welcome. I was doing something similar to your first approach (different camera though). Could you double check you can't reach focus even with the diagonal moved all the way out (or even a bit further, held in hand)?

I love the images, but especially the animation is wonderful! As for the orientation, you can open everything in GIMP using File/Open as Layers..., and then use Image/Transform (will rotate every layer). You can also crop, scale, preview animation using Filters/Animation/Playback..., and finally exp...

That's a great result and an interesting setup! I loved my former SW Mak 180 for white light work, but didn't see an easy way to use it for Hα. I may revisit it in the future (perhaps a Quark Combo?).

Do you perhaps have some images made with only the Mak + TV2x + LS50F?

Welcome to the forum. Be warned, you'll probably stay here for years to come!

Alfred,
I may be doing something wrong, but when trying to download, I'm getting 8-bit JPG images.

yltansg wrote: ↑

Thu May 14, 2020 10:13 am

Unfortunately you did not attached the XML file used in your processing.

(Already resolved, that was Alfred's local problem with opening the file.)

Great image, Valery, thank you.

My approach (ImPPG settings file is attached):

This sounds like a file permissions problem. If I had to guess, for some reason ImPPG is now launched in a compatibility (with an older Windows version) mode, runs with administrator permissions, and whatever files it saves are changeable by administrators - but not regular users. Can you delete tho...

Since the surface brightness of the sun disk is 106 times greater than that of the corona Ha, I've just noticed this. Better to clarify, lest some reader thinks "so what's the big deal with imaging it" ;) Looks like the forum currently doesn't support "superscript" BBcode tag, but one can use the U...

A small bugfix update – version 0.6.1 – is available at https://github.com/GreatAttractor/imppg/releases Bug fixes: Invalid batch processing results in OpenGL mode Enhancements: Tone curve window position reset command For the rare situations where window positioning does not work correctly, you can...

One could think that perhaps SCT reflects/absorbs much more IR than the Newtonian, but the only difference would be the thin glass corrector... seems strange. This, however: The heat coming out of the focuser is also significantly higher than my SCT, even with a 2nd DERF there, it's hotter on my han...

I observe quite rarely, but here's my advice: once you max out with the 'scope (& double-stacking options), I strongly recommend getting a binoviewer. I have a Baader Maxbright with 2x 15 mm Plössls (just regular ones) and the views with the 50 mm and 90 mm H-alpha setups are wonderful. I also had j...

I use helioviewer.org, which shows the current SDO images among others.

To those who downloaded the Ubuntu package: I've uploaded a corrected one, which also installs an ImPPG application shortcut (so it can be selected in "application launcher" of your desktop environment). The same goes for building under any Linux (or alike) system. Pull the latest source code, and t...

I'd miss out the wavelets and go straight to ImPPG for sharpening Indeed! It will work best with raw, unprocessed stacks. Though one could do the primary sharpening elsewhere (e.g. wavelets in Registax) and then just touch up in ImPPG (probably with L-R disabled, just apply unsharp mask and modify ...

Hi Rainer,

That's right, ImPPG is for post-processing of stacks. So you must stack your AVI first (e.g. in AutoStakkert), and then you can open the resulting TIFF in ImPPG. On the home page you'll find links to a few tutorials:

http://greatattractor.github.io/imppg/

GPU mode will be activated by default when you first start ImPPG 0.6.0. The current mode is indicated in the status bar in the lower right:
You can switch between CPU/GPU modes in the menu:

Wow, great to hear this! Thanks for checking. I must get me one of those high-end babies one day...

Hmm, by the looks of it, it's not "too strong", rather the processing went completely bonkers :) Standard OpenGL has no provisions to choose the active GPU (though there are AMD- and NVidia-specific extensions, as I've now googled), it's up to the operating system/driver configuration. I wouldn't th...