This object surprised me first time I took a look. It is as has been said here 'a wonderful egg'. The second time I saw this one I was very pleased that the darker drop-out to the NNE can be detected. This PN responds best with my Lumicon OIII offering a better view than my 'goto' NPB filter.

Here is an 18" 243x observation from a 21.3 SQM type of site (so the OIII helps greatly over unfiltered).

1/4fov[8.2'] 1.8EL N-S slight EL NPB filter The even round glow is about 1/5fov[6.6'] but with some glow extends as a 'nob' off the south side. Central star is apparent with NPB but no other stellar points seen in the glow with NPB. Possible mottled look on the NNE end. Using OIII filter central star still easy. Extension to the south stands out better with the OIII filter and still 1/4fov[8.2'] but maybe as must as 2.0EL in the OIII. NNE darker dropout before the edge gets brighter again is easier to see in OIII. West is at 9pm'