I'm looking to purchase one of the fd-mount 85mm f/1.8 lenses for my recently-acquired Canon FTb.
It seems that the earlier 85mm f/1.8 SSC Breech-lock lens commands a somewhat higher price than the later "new-fd" 85mm f/1.8.
Can anybody explain the reason for this? I would expect that the lenses are optically the same and that this is just down to a general belief that the Breech-lock mount is regarded as mechanically-superior to its "new-fd" counterpart. But is that the case?