SIGMA 500mm f/4 DG OS HSM Sports Lens for F - Manual (Page 6)

 Circular PL Filter RCP-11 is a drop-in polarized filter (sold
separately).
Circular PL Filter RCP-11 is a drop-in filter that can easily be rotated while the lens is in use. (A
protector that is inserted in a slot at the rear of the lens comes with the lens as standard
equipment.)
3. Functions that satisfy the demands of professional photographers.
OS system with acceleration sensor and new Intelligent OS algorithm
The Optical Stabilizer (OS) system features an acceleration sensor to deliver even more precise
performance and up to approximately four stops of stabilization. Two OS modes are available:
Mode 1 for general photography and Mode 2 for motor sports and other applications requiring
panning. In Mode 2, the acceleration sensor teams up
with the Intelligent OS and its updated stabilization
algorithm to deliver effective stabilization while you
move the camera horizontally, vertically, or
diagonally—regardless of the position of the lens.
This feature helps ensure effective panning and outstanding capture of moving subjects.
AF function switch with preset AF modes
The AF function switch allows you to set your own autofocus specification. The lens can remember
the focus position of your choice or turn off AF until it is needed.
Note: Image is for SIGMA mount lenses. Available switch functions may vary by mount.
Manual override incorporated to make two full-time manual modes
switchable.