Sigma AF 120-300mm F2.8 EX DG APO OS HSM Specifications
Diagonal Angle of View:
20.4° - 8.2°
Number of Aperture Blades:
150cm - 250cm
Hyper Sonic Motor, internal focus mechanism
Full Focus Throw:
rotary, internal zoom mechanism (no extension during zoom)
LH 1128-01 (bayonet mounted, round shape)
Focal Length Setting 120mm : Magnification 1:8.80
Focal Length Setting 200mm : Magnification 1:6.67
Focal Length Setting 300mm : Magnification 1:8.96
The lens features dust and moisture sealings and comes with detachable tripod collar TS-31.
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."
Sigma reported Live View issues with the EOS 750D and 760D for lenses with SN #12676440 or later: When the Live View Mode button on the camera body is pressed, operation stops. A service update was/is available [source