Pentax *ist Operating Manual page 145

Lenses
FA, F, A, M, S (lens
only, or with auto
diaphragm
accessories such as
auto extension tube
K
FA, F, A, M, S (with
manual diaphragm
accessories such as
extension tube K
Manual diaphragm
lens, such as reflex
lens (lens only)
FA, F Soft 85mm
FA Soft 28mm
(lens only)
All lenses
Exposure mode
Aperture-Priority
AE mode
Aperture-Priority
AE mode
Aperture-Priority
AE mode
Aperture-Priority
AE mode
Metered Manual
Restriction
The aperture remains wide
open regardless of the
aperture ring position. The
shutter speed varies according
to the aperture ring position,
however, an exposure error
may occur. Aperture value
displays [F--] in the viewfinder
and [AV--] on the LCD panel.
Pictures can be taken with the
specified aperture value,
however, an exposure error
may occur.
Aperture value displays [F--] in
the viewfinder and [AV--] on
the LCD panel.
Pictures can be taken with the
aperture value manually
specified, however, an
exposure error may occur.
Aperture value displays [F--] in
the viewfinder and [AV--] on
the LCD panel.
Pictures can be taken with the
specified aperture value and
shutter speed, however, the
built-in light meter does not
operate, therefore, the
exposure cannot be
evaluated. Aperture value
displays [F--] in the viewfinder
and [AV--] on the LCD panel.
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