based on EOS models with exposures displayed in 1/2 stop increments.
It varies slightly with the EOS-1v, EOS-1N, EOS-1 and EOS-3.
the EF 70-200mm f/2.8L USM lens is attached to an EOS camera having
multiple focusing points and an Extender is attached to the lens,
only the center focusing point will be usable for AF.
autofocusing range is from 0.8m/2.6ft. to infinity.
||With the EOS-1D series, EOS-1v and EOS-3, AF is possible, but with the center focusing point only.
Image Stabilizer does not operate with the following cameras: EOS
650, 620, 630/600, RT, 700, 750, 850, EOS-1, A2/A2E, 10s, Elan, Rebel/Rebel
S, Rebel II/Rebel SII.