Ah, I see what was meant, now. I never look for things like that in pictures: I only care if they appeal to me or not on their own merits. But, having had the effect pointed out to me, I now think I recognize something I've seen on my own pics now and then, and had imagined was just the result of poor masking when making local selections...
On the other hand, look at it this way: you had to pay a small fortune to buy a set of Softar filters to do the same on a Hasselblad.
I had an adaptor that allowed me to use mine on the Nikkon lenses too. I have noticed that one such shot, posted here I think some long while back, of a girl sitting on a rock in a garden in Singapore, partly backlit to get the halo effect, lost almost all of said effect when I thought I had to give the image a little bit of sharpening to post it. On film, when sharpening wasn't within the snappers remit, your Softar gave you good detail as well as a soft halo effect, all at the same time, unlike a normal softening filter that killed everything. (I just looked to check: the shot in question is the second one in the first gallery in my website, but the halo is virtually invisible at 500 pix. across the image, so pointless checking; sharpened right away!)
Rob C