Managed to get data for a second panel in 3nm N[II]. The forbidden transition N[II] needs bright blue stars to excite it from monatomic Nitrogen.
It looks like the the far larger and far further away SNR or Gum nebula behind the Vela SNR has very little N[II] and is mainly HA. The aim is to make a mosaic about 4X4 panels with N[II] as the red channel and OIII to green and blue. This will be blended with LRGB to get the star colours and dust. This will hopefully separate the Vela SNR from the confusing HA background.
Here is the two panel mosaic in 3nm N[II]. FoV 6.6 X 3.5 degrees. 7MB
http://d1355990.i49.quadrahosting.co...10/VSNR1&2.jpg
Exposures for both panels 5x16 minutes.
Bert