Canon EF 300mm f/2.8L IS II USM and EF 400mm f/2.8L IS II USM

As far as image stabilization we have available three modes:

     MODE 1 - corrects vibrations from every direction, mainly for shooting stationary subjects
     MODE 2 - corrects vertical vibration during movement of the horizontal and vice versa
     MODE 3 - adjusts vibration only during exposure, acts as MODE 2

The second group of switches is closer to the cap. The first one allows you to choose: autofocus, manual focus or measure PF mode, the Power Focus. The second allows you to narrow the focus operation. It is a very useful feature that accelerates the autofocus.

Canon EOS 5D Mark II
f/3.5, 1/1600s, ISO 640, Exposure compensation: 0 EV, 300 mm

Canon EOS 600D
f/3.5, 1/1000s, ISO 400, Exposure compensation: 0 EV, 400 mm

Canon EOS 600D
f/3.5, 1/800s, ISO 400, Exposure compensation: 0 EV, 400 mm

Canon EOS 5D Mark II
f/2.8, 1/100s, ISO 100, Exposure compensation: 0 EV, 400 mm

Canon EOS 5D Mark II
f/5.6, 1/25s, ISO 100, Exposure compensation: 0 EV, 400 mm

 Canon EOS 5D Mark II
f/2.8, 1/100s, ISO 100, Exposure compensation: 0 EV, 300 mm

Canon EOS 5D Mark II
f/5.6, 1/25s, ISO 100, Exposure compensation: 0 EV, 300 mm