Nikon D5100 Reference Manual page 65

The exposure program for mode P is shown in the following graph:
F (lensfocal length) <_ 55 mm
55mm < F<_135mm
_135mm<F
fl
f1.4
f2
f2.8
f4
f5.6
f8
fll
f16
f22
f32
Y///// >< ///
///////// /
//////////
///////////_////_Y,,"
30" 15" 8" 4" 2" 1"
1/2 1/4 1/8 1/15 1/30 1/60 1/125 1/250 1/500 1/1000 1/2000 1/4000 1/8000
Shutter speed (seconds)
The maximum and minimum values for EV vary with ISO sensitivity; the above graph
assumes an ISO sensitivity of ISO 100 equivalent. When matrix metering is used,
values over 161/3 EV are reduced to 161/3 EV.
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