This is the H-Alpha data for the colour version of ngc6914 also in this gallery.
NGC 6914 is a reflection nebula located approximately 6,000 light-years away in the constellation of Cygnus, and was discovered by Édouard Stephan on August 29, 1881.
Ultraviolet radiation from stars in the Cygnus OB2 association ionize the nebula's hydrogen. It is immersed in a bath of HII emission from surrounding Hydrogen gas.
I was struck by the beautiful contrast when seeing a superb APOD of it here: https://apod.nasa.gov/apod/ap220707.html

33x20 min H-Alpha
Camera: Moravian G4 (16803) w Gen II Astrodon H-Alpha
Scope: Astrophysics AP155EDF Refractor w Focus Boss II
Mount: Paramount MX
Guiding SBIG ST402ME attached to a Borg 60mm guidescope
Processing in PixInsight and in PS CC