Pentax *ist IST DS - Manual (Page 117)

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5
F
uncti
on Re
ferenc
e
You can set the sensitivity to suit the brightness of the surroundings.
The sensitivity can be set within a sensitivity range equivalent to ISO 200
to 3200. The default setting is [200].
Set [Sensitivity] in the Fn menu. (p.102)
You can increase or lower the sensitivity if the subject is too light or dark,
or if the aperture value in relation to the shutter speed or shutter speed in
relation to the aperture value is not correct. Sensitivity is not corrected by
default.
Set in [Senstvty Corction] in the [A Custom] menu. (p.100)
Setting the Sensitivity
Captured images can show more noise if higher Sensitivity is set.
Correcting the Sensitivity Automatically
1 Off Sensitivity is not corrected.
2 ISO 1600 Sensitivity is corrected within a range of 1600.
3 ISO 3200 Sensitivity is corrected within a range of 3200.
800 800 800
1600 1600 1600
3200
3200 3200
400 400 400
200 200 200
OK OK OK OK
Sensitivity Sensitivity Sensitivity
Senstvty Corction
Sensitivity is not
automatically corrected
Off
ISO 1600
ISO 3200