Compare Test Blue Signal

I tested the comparison of Oiii and Hb+Oiii in the nebula where blue is difficult to appear in the Narrow Band Combine with the Cocoon Nebula.
Ha is extracted from 3nm L-Ultimate
Oiii is also extracted from 3nm L-Ultimate
Hb-Oiii is extracted from 36nm L-eNhance
The first one is Ha-Oiii-Oiii
The second one is Ha-HbOiii-HbOiii
Dr. Kijja from AstroPal in Chiang Mai told me that B=L-(L*R)-(L*G) with PixMath can be used for LRGB photography.

Narrow Band Combineでの青が出にくい星雲でのOiiiとHb+Oiiiの比較をCocoon星雲でTestしてみた。
Haは3nmのL-UltimateからExtract
Oiiiも3nmのL-UltimateからExtract
Hb-Oiiiは36nmのL-eNhanceからExtract
1枚目がHa-Oiii-Oiii
2枚目がHa-HbOiii-HbOiii
Narrow Bandとは別にLRGB撮影であれば、PixMathでB=L-(L*R)-(L*G)で綺麗な青を取り出せることをチェンマイのAstroPalのDr.Kijjaさんより教えていただいた。

Celestrron C11 Prime Focus (F/10 f/2800) ,
QHY294C-Pro,Optolong L-Ultimate,L-eNhance,
Optron CEM70G

Cocoon_RGB_crop_BGE-Edit01-finish

Cocoon_HOO_1_crop_BGE_ABE-Edit01-finish



Oiii-HbMono