[madbadgalaxyman (Robert)]

Very very interesting. Nebulosity thru the entire field.
I can't say I have ever "been there"(or even "done that"), when it comes to this interesting field.

High quality Amateur nebula images like yours are now so much deeper even than the H-alpha surveys of the Milky Way that the "pros" did a few years ago.....I wonder if there could be some scientific value in this type of photography.

The H-alpha emission throughout your field is probably best thought of as "diffuse Hydrogen alpha emission" rather than as being an isolated nebula.
( I seem to recall that the diffuse component of the H-alpha emission of a spiral galaxy is about 50 percent of the galaxy's total Hydrogen alpha emission....but don't quote me on this)

In some circumstances, this sort of very very diffuse and very very extended H-alpha emission is at a particular velocity in our line-of-sight and this velocity can be translated to a distance estimate for the layer of H-alpha emitting gas. (obviously a velocity requires a spectrum with an H-alpha line on it)
Layers of very-extended and very diffuse H-alpha emission have been used by some professionals to trace the spiral arms of our galaxy.

I note that many amateur images of various HII regions were used in "Handbook of Star Forming Regions", a superheavyweight "professionals" guide to nebulae and gas/dust clouds in our Galaxy. Obviously, the amateur images were the best available for the objects in question!
(this book is characterized in my recent post in the "Science" forum entitled "Our Galaxy - Some recent Resources)