Pentax K-5 Operating Manual page 149

The Shake Reduction function operates by obtaining the lens information
such as focal length.
If the camera uses a DA, DA L, D FA, FA J, FA or F lens, the lens information
is automatically obtained when the Shake Reduction function is activated.
If you use a lens whose information such as focal length cannot be
automatically obtained (p.337), the [Input Focal Length] setting screen
appears when the camera is turned on with the Shake Reduction function
set to ((4W)) ( On).
Set the focal length manually in the [Input Focal Length] setting screen.
• The [In put Focal Length] setting screen does not appear when using a lens
whose information such as focal length can be automatically obtained.
• When using a lens without the A position on the aperture orwith the aperture
set to a position other than A set [27. Using Aperture Ring] in the [C Custom
Setting 4] menu to [Permitted]. (p.339)
• The effect of Shake Reduction is influenced by the shooting distance as well
as focal length information. The Shake Reduction function may not work as
effectively as expected when shooting at close ranges.
I
Use the four-way controller
( • • ) or the rear e-dial (;,,_,,_) to
set the focal length.
Select from the following 34 focal length
values. (The default setting is 35 mm.)
2
, !f the foca! length foF your lens is not liste d abovel select the value closest to
the actua ! focal length(example: [18] fo i 17 mm and [! 00] for 105 mm).
, When using a zoom !ens, select the actual focal length at the zoom setting
being used in the same manner:
Press the
OK
button.
The camera is ready to take a picture.