Never saw ghosting on any object.
Neither did I, but I still have never liked the 12NT4. I own the complete sets of Delos, Delite, NT4 and NT6. If I had to make a choice I would dump the 12NT4 for either the Delos, or the Delite.
I just have never ever warmed up to the 12mm Nagler Type 4. IMO its the weakest ocular in the T4 lineup.
One of my all-time favorite eyepieces is the 13mm NT6 which would also make a good substitute for the 12NT4.
Eyepiece choices are very subjective and, it also depends on the telescope that you observe with. Don't take my opinion as gospel, its only another data point along your decision path.
Edited by peleuba, 21 August 2019 - 10:52 AM.