This is an experiment in a 4 panel mosaic with a very minimal data (5x120sec exposures per filter/ per panel).  This experiment was to make a test/trial-and-error run at the post processing workflow needed for a large (4 panel) mosaic with a monochrome camera and LRGBHa filtering.  The final mosaic image (in Pixinsight) is quite large, at 1.8 gb - there is no drizzling of any of the component panels.

This is an LRGB+Ha image and this is just one night with a very limited window to gather the data.  The first set of frames was discarded since I had started too early/too low to the horizon which resulted in very bad sky glow.

The end result is that there is only about 10 minutes (+/-) of integration per filter/per panel which is why there is a lack of detail in the cloud structure.  I will be adding data to this target as observing / clouds permit, but I'm beginning to believe this will require one or more observing seasons to get enough data in each mosaic pane to matter.

A note to clarify:  the total integration time shown in the Astrobin Tech card is PER Mosaic PANEL (there are 4 panels).  I think that is the most accurate way to indicate total integration time for mosaics since the imaging time for the individual panels does not stack/accrue to all the panels.

The Rho Ophiuchi cloud complex is a complex of interstellar clouds with different nebulae, particularly dark nebulae which is centered 1° south of the starρ Ophiuchi, which it among others extends to, of the constellation Ophiuchus. At an estimated distance of 131 ± 3 parsecs, it is one of the closest star-forming regions to the Solar System.

It is closely associated in location with Antares.  Antares is the brightest star in the constellation of Scorpius. It has the Bayer designationα Scorpii, which is Latinised to Alpha Scorpii. Often referred to as "the heart of the scorpion", Antares is flanked by σ Scorpii and τ Scorpii near the center of the constellation. Distinctly reddish when viewed with the naked eye, Antares is a slow irregular variable star that ranges in brightness from an apparent visual magnitude of +0.6 down to +1.6. It is on average the fifteenth-brightest star in the night sky.