An interesting note, these lenses are available on Oly, Sony, and Pentax mounts which all offer sensor based stabilization. So you could reasonably use one or the other depending on your needs. These are also the first third party HSM/SSM/whatever lenses for Sony/Minolta mount.
|Quoting F14 (Thread starter):|
APO 150-500mm F5-6.3 DG OS HSM (should have called it the "Bigma Mk.2"):
Son of Bigma would probably be a better term, only a 50-500 can be Bigma mk 2