The planetary nebula NGC 2818A is surrounded by about 40 stars (up to 11.3 mag) of the open cluster NGC 2818, see the full frame image below.
This tiny PN only spans about 60 x 30 arc-sec

Find more information on this nebula  here.

Find a Hubble NB image of this nebula here.

Image data: Ha-O3-S2-RGB (400-320-200-100-100-100 min) total 19.3 h, north is up, seeing 0.8-1.2 arc-sec,
80cm f/7 Astrooptik Keller cassegrain, FLI PL-16803, Baader filters, Prompt 7 CTIO Chile
Processing: Johannes Schedler

Find a version with normal color designation below the full frame image and at bottom a version in Hubble color palette both in 75/150% size.