Sigma AF 80-400mm F4.5-5.6 EX DG APO 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)
LH 840-01 (bayonet mounted)
The lens comes with detachable tripod collar and features ZoomLock.
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."