So M83 is a bit of a challenge for me here in northern latitudes. I did apply extinction factors to the colors to compensate for the low elevation (over and above that of my G2V factors taken near zenith). Color is always a challenge close to the horizon for me. Image and details are at the link below.
http://www.jthommes.com/Astro/M83.htm
scope - C8 at f/6.9
camera - ST8300M (Baader LRGB filters)
http://www.jthommes.com/Astro/M83.htm
scope - C8 at f/6.9
camera - ST8300M (Baader LRGB filters)
Jim Thommes
Mak-Newt 152 mm
C8
Megrez II APO
Zenithstar 66 mm APO
G11/Gemini
ST8300M
Artemis285 Camera
Canon 350D DSLR
http://jthommes.com/Astro/