Cave Nebula in Cepheus, 2400ly HOO

For some reason I have always liked this nebula. The entrance to the cave is the dark lane, lower middle, leading into the cave where the bright spot is. Can you imagine ducking your head as you enter. I can.

AskarV@600f7.5, 2600MM Pro g100. [3.75hrs total] R:15x300s G:15x300s B:15x300s
[15.6hrs total] Ha:55x300s O3:64x300s S2:68x300s+darks/biases/flats.
AM5/ASIair+, EAF, Askar OAG with ASI174mini for guiding

PixInsight 100%.

I developed the RGB, SHO and HOO images. They are all interesting in their own way. I chose the HOO image because it shows the most detail. It really does an excellent job of showing the details of the O3 in this nebula.