Exposure Values
The aperture and shutter speed combination set op-
posite the central lens index determines the exposure.
Every combination of shutter speed/ aperture has an
equivalent exposure value (EV) which you can read
and set against the red EV index on the side of the
lens.
Interlocked Shutter Speed/ Aperture
If you want to change the shutter speed or aperture
without changing the exposure value (EV), you can
interlock the speed and aperture setting rings by hold-
ing down the interlock button which is on the right of
the aperture scale. When interlocked, the rings move
together, increasing or decreasing the aperture to
compensate for a decrease or increase of speed re-
spectively.