28 Aug 2023
Because the L signal was relatively weak, i combined it with (pseudo-)L extracted from the RGB image to improve the signal:noise, particularly in the extended outer nebulosity.
L 2400s (8 exposures)
R 4500 (24)
G 5280 (28)
B 5700 (26)
M51
21 credit
Filtro | Exp. media (s) | Esposizione totale | Sottoframe |
|---|---|---|---|
| Luminance | 189 | 6h40m | 127 |
| Green | 130 | 4h36m | 127 |
| Red | 135 | 4h44m | 126 |
| Blue | 130 | 4h34m | 126 |
| Halpha | 36 | 1h15m | 126 |