Has anyone had the opportunity to compare the 50/4 Distagon for Rollei SL66 mount to the Hassy mount lenses? Is it safe to say this lens is closer in pedigree to the older Hassy C lens than the CF/FLE? I just picked one up on ebay: Rollei HFT, the all black later style. Either way, I'm sure I won't be disappointed. It will be nice to finally have some wide angle capability in medium format.