..all interesting - some rare - but what are the differences?

I am now at that lucky position to own one of all.. approx the same FL, so I'll be able to make some reasonable comparisons...

I have to wait a little, as I am on my way to Prague (someone has to do it..) but I'd be interested to see IF there is a noticable difference, or....

In the meantime, post some crazy soft focus images, made with one of these lenses, if you got one...