May I see some of those photos? I'm genuinely curious what lens is capable of night flares on the edge without distortion; the only one I can think of is the Nikkor 50mm 1.2, considering it was designed for this. The Pentax 85mm 1.8, which is my closest to that lens certainly can't do this feat but in the center - it does spectacular nightscapes though.
Uhm... this only verifies what I was saying: they are not uniform. There are deformations, differences among them, as it should be. The opening post had basically the exact same flaring and it was obviously post production.
