Gum 15

en.wikipedia.org/wiki/Gum_15

This is a colour photo with B/W camera. For those not sure a normal colour photo is with a normal colour Camera RGB (Red Green Blue). For those old enough to know film photography will know you can colour the B/W photo with filters this is very much the same principal used for Astro photography.

For Astro photos there are two set of filters for a B/W camera LRGB equivalent of a normal colour camera. Then there are the filters that high light the Gasses that make up the Nebula's Ha O3 S2 for Hydrogen Oxygen & Sulphur . The filters are in a filter wheel that moves to the correct position of each filter and to focus on the Luminescence filter then back to the right filter. This can be put into the RGB format in a few ways this Photo Is HaS2O3 format in the RGB colour pallet. There is also the well know Hubble pallet as well S2HaO3.

This was taken during our heat wave 40c+days and 33c nights, so the camera was run at -5c rather than -10c. The system was set to focus every hour during the photo session. This is my very first photo to this type of photo taking this way so an even bigger learning curve than normal colour camera.

ZWOASI183MM -5c 60 shots 10 min each over 5 nights .
Prima Luce Essato Focus ,
Ha O3 S2 Set of filters 60 of each,
Skywatcher Black DiamondED80 OTA
Skywatcher NEQ 6 Pro Hypertuned
Guided PHD2, SGP
Pixinsight, Ps Lr.