Rarely imaged, this very faint lobe extends from the emission nebula SH-212, is a good sized object for a 300mm Pentax lens/ST-X10ME combination.
HaRGB 5.5 hrs Ha, 1 hr R, 1 hr G, 1 hr B.
Higher resolution here.
http://members.iinet.net.au/~sjastro/rcw133c.html
Clear skies
Steven