M57 Ring nebula and its faint outer shell (HaRGB)
Posted: Thu Nov 23, 2023 4:54 pm
Since there seems to be an everlasting period of clouds here (going 8 weeks now ), I decided to to some re-processing of older data.
In the is case M57 Ring Nebula.
In 2021 I made captures of it, including Ha with my then new Optolong L-eXtreme filter. The results back then were okay, the outer shell was visible.
But the mixing of Ha and RGB and getting an overall result with core and outer shell visible was not that good.
Forward 2 years in which I learned a lot of more about processing and the result of re-processing are way better
It took a lot of effort and experimenting though (especially in Photoshop) to get a balanced result where the core and outer shell were visible.
But after 3 days of "fooling around", I decided this to be the end result (for now ). No reduction, crop only.
Bortle 6/7
Meade LX200 8" f/10 ACF OTA
Ioptron CEM25EC mount (no guiding)
Baader IR/UV Cut filter
Optolong L-eXtreme filter
Zwo ASI071MC Pro camera
Captured with SharpCap Pro @ -10 Celsius / White balance R50 B50
RGB: 35 x 300 sec / Gain 0 / Offset 4
Ha/OIII: 11 x 600 sec / Gain 200/ Offset 10
In the is case M57 Ring Nebula.
In 2021 I made captures of it, including Ha with my then new Optolong L-eXtreme filter. The results back then were okay, the outer shell was visible.
But the mixing of Ha and RGB and getting an overall result with core and outer shell visible was not that good.
Forward 2 years in which I learned a lot of more about processing and the result of re-processing are way better
It took a lot of effort and experimenting though (especially in Photoshop) to get a balanced result where the core and outer shell were visible.
But after 3 days of "fooling around", I decided this to be the end result (for now ). No reduction, crop only.
Bortle 6/7
Meade LX200 8" f/10 ACF OTA
Ioptron CEM25EC mount (no guiding)
Baader IR/UV Cut filter
Optolong L-eXtreme filter
Zwo ASI071MC Pro camera
Captured with SharpCap Pro @ -10 Celsius / White balance R50 B50
RGB: 35 x 300 sec / Gain 0 / Offset 4
Ha/OIII: 11 x 600 sec / Gain 200/ Offset 10