Hello everyone,
I processed my images taken from April 29 to 30 with my new ToupTek 585 camera, my 8 x 1.25" filter wheel.
I targeted LDN 1251, not necessarily an easy choice for starting out in LRGB, but I figured that with my 4 or 5 years' experience in OSC with Pixinsight it would be manageable...
So I took 250 images of 120 sec, unity gain 120 and default offset, at -10°C.
100 x R, G and B images.
I made darks, flats and dark flats with NINA's PLU assistant, and used WBPP v2.8.2 in Pixinsight v1.9.2.
Having no benchmark, for my first LRGB processing, I followed two approaches, Cuiv The Lazy Geek's in this video:
- https://www.youtube....h?v=XCotRiUIWtg (starting at around 2h31mn for LRGB process)
And another recent one by Peter Zelinka here:
- https://www.youtube....h?v=_MpfyJnGTPQ
Once I'd retrieved my images, I started by processing my LRGB masters as follows:
- GraXpert to remove gradient
- BlurXterminator
- NoiseXterminator (30%) to remove noise
- Spectrophotometriccolorcalibration
I then used ChannelCombination to combine the 3 colors and got this:
But as you can see, there's a sort of more or less rectangular purple shape, but not perfectly geometric, superimposed on the background image.
I looked at all my images with Blink, but I wasn't struck by any flaws, on the luminance master we can also notice a very slight veil with a shape that could look a little bit like the one on the RGB combined image but it's hard to tell...
The image below is the luminance master also processed with GraXpert BlurXterminator and NoiseXterminator :
With my final image, I managed to remove most of this purplish rectangular shape but we can guess it in some parts...
I tried to use SCNR as advised somehwere in this forum, inverting first the image, and without inverting, but to no avail...
I've uploaded samples as well as the final image (Tiff file) if someone could take the time to look at the images and give me their opinion...
- https://drive.google...VI9?usp=sharing
Again, this is my very first LRGB processing and therefore I haven't got much experience to know if this purple shape is to be expected under some circumstances, or if it could be the bug with the firmware of my filter wheel that I would need to apply in order to get rid of the banding due to the IR light of the filter wheel to move the plate!
Kind regards
Philippe
Edited by Phil49, 12 May 2025 - 06:42 AM.