M31 shot only in Ha and OIII.
Equipment:
- Samyang 135mm f2.0
- Fuji X-T5 unmodified
- Star Adventurer 2i
- STC dual narrowband filter
Images:
- 650x 60s
- ISO 3200
Processing:
- remove green noise
- background extraction
- photometric colour calibration
- BluXTerminator
- NoiseXTerminator (0.4)
- star removal
- GHST
- saturation, blending and final adjustments in Photoshop
Is the [OIII] filter really doing anything for you? I think it’s really only showing continuum, in which case you’d be better served with a wider bandpass.
No not for this target. As I use a dual narrowband filter I‘ll always get OIII as well, but as you said in this case it just shows the normal continuum. I shot this data to combine it with RGB in the future, but I liked how M31 looks with just narrowband so I wanted to share anyway.
Oh, a dual narrowband filter in front of an RGB sensor. Oh, that makes sense.