The Cat's Eye Nebula in Draco
Three images created from short exposures, displayed at 0.3 arcssecs/pixel (2x enlargement from scale at capture).
A: RGB, each channel created from a single 30 second exposure.
B: Stack of 2 minute Ha:OIII exposures.
C: Same exposures as B. Two layers were blended, one stretched to display the Ha core extensions, the second to show the concentric rings around the core.