Nikkor-UD 20/3.5

[MEPER]

Looks like a good place to sit in the afternoon sun with a cold beer.
If that is the worst it can get (regarding flare/ghosts) it is not "too bad".

I remember from Rørslett lens page that the 20/3.5 (52mm filter version) should be especially flare/ghost resistant and from my memory it is correct when I tried my own version long time ago.

It also seems that modern sensors handle vintage lenses better than "vintage" sensors.
From memory I think my D2X SLR (now sold) showed more "CA artifacts" using vintage lenses than on my Z50. It could also be in-camera processing / RAW conversion that has improved.
I don't see much CA when using vintage lenses on Z50.

[Airy]

In absolute terms, more recent lenses such as Voigtländer 58/1.4 perform much better against sunlight, but considering the age of the coatings and the fact it's a SWA, the 20/3.5 UD is not bad, really.