Interesting Bob, I haven't played with Lith yet. I'm sure there's flare involved.

That's the kind of stuff I was hoping to find, stuff done for effect.

The 35mm lens that I talked about in the op actually provided an interesting effect, it was a problem only because the expectations were different for that work.

Though tame compared to your example, my 150SF lens for my RB brings a wonderful glow to strongly lit or backlit subjects that simplifies the subject matter, blurring the imperfections.

This is really useful when photographing women with a touch of maturity but not limited to them.