Sigma AF 80-400mm F4.5-5.6 EX APO RF OS Specifications
Diagonal Angle of View:
30.3° - 6.2°
F22 - F32
Number of Aperture Blades:
rear focus (mechanism allows for full-time manual focus, despite not feat. HSM)
Full Focus Throw:
LH 840-01 (bayonet mounted)
The lens features ZoomLock and comes with a detachable tripod collar.
Sigma's OS seems to face similar incompatibility problems with old analog bodies like Canon's own IS lenses. I.e. Sigmaphoto.com puts a note to many fullframe OS lenses either reading "This lens cannot be used with film SLR cameras with the exception of the Nikon F6 and Canon EOS-1v." or (seemingly making the issue more clear) "For Nikon and Canon mounts, Optical Stabilizer (OS) function will not work with film SLR cameras except Nikon F6 and Canon EOS-1V."