The Rosette Nebula (also known as Caldwell 49) is a large spherical H II region (circular in appearance) located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.
Tracking with iOptron Skytracker,
Canon FD 200/2.8 at 5.6
STC Astro Duo-Narrowband Filter (Ha (656.3nm) & O-III (500.7nm))
~100 x 30 sec at iso 6400
Stacked in Deep Sky Stacker, curves, WB, crop in Lightroom, then fine tuning curves in Photoshop
Shot from Rehovot, Israel, Bortle 7
Deep Sky, the full list