Nikon Df Digital Camera User Manual


 
74
S
A Minimum Shutter Speed
Auto shutter-speed selection can be fine-tuned by highlighting Auto
and pressing 2: for example, values faster than those usually selected
automatically can be used with telephoto lenses to reduce blur. Note,
however, that Auto is available only with CPU lenses or when lens data
are provided for non-CPU lenses; if a non-CPU lens is used without lens
data, minimum shutter speed is fixed at
1
/30 s. Shutter speeds may drop
below the selected minimum if optimum exposure can not be achieved
at the ISO sensitivity chosen for Maximum sensitivity.
A Auto ISO Sensitivity Control
Noise (randomly-spaced bright pixels, fog, or lines) is more likely at
higher sensitivities.
Use the High ISO NR option in the shooting menu
to reduce noise (see page 242).
When a flash is used, the value selected
for Minimum shutter speed is ignored in favor of the option selected
for Custom Setting e1 (Flash sync speed, 0 257). Note that ISO
sensitivity may be raised automatically when auto ISO sensitivity
control is used in combination with slow sync flash modes (available
with optional flash units; 0 116), possibly preventing the camera from
selecting slow shutter speeds.