14/01/2026
Reusing leftovers - Around three years ago (01/2023) I started shooting this object, but it never came to life. Since then, I was repeatedly using this object to test my filters for halos - and I tested quite a lot. Six different duo-narrowband filters and one SHO set for mono cameras were tested on this object to see if the two bright stars (Tejat and Propus) can cause any halos.
Now, I tried to combine all my test images and "leftovers" to an usable image. For the SII channel I had to combine a 2 panel mosaic, since I was using another telescope with a smaller field of view. So quite an extensive work to combine all those (quite different) frames.
What you see here is a supernova remnant (SNR) called the Jellyfish Nebula as a narrowband false-color display.
As you swipe along, you will see different channel combinations. Which one is your favorite?!
1. SHO | 2. HOO+SII | 3. OHS
Most of the data was collected with my Apo setup:
TS CF Apo90 | x0.8 red | 432mm | f/4.8 | QHY268c
Filters I tested were:
Optolong L-eXtreme
Altair Ultra 4nm Ha-OIII (two versions)
Altair Ultra 6nm SII-OIII
Antlia Alp-T Ha-OIII
Player One Anti Halo Pro Ha-OIII
To add more signal to the SII channel, I added data from my Newtonian rig with the Baader Highspeed SII filter:
Lacerta Fotonewton 8" | Nexus | 600 mm | f/3 | TT2600m
