The famous Ring Nebula M57 (planetary nebula in constellation Lyra and about 2500
lightyears away from Earth) was photographed using H-Alpha en O-III filters.
Setting : Nikon D7500 with TAL200K f/8.5; H-alpha ISO3200 and ISO6400 (total 25x90s), OIII ISO400 20x60s and RGB ISO 400 20x60s ISO. Raw pictures are stacked using APP and the individual sessions are stacked using CS4. Final editing with DeNoisse AI.
