Notes On [Using Aperture Ring] - Pentax K100 D Operating Manual

Notes on [Using Aperture Ring]

188
Aperture Ring Use
When [Using aperture ring] is set to [Permitted] in [A Custom Setting]
menu (p.107), the shutter can be released even if the aperture ring of the
D FA, FA, F or A lens is not set to the s position or a lens without a s
position is attached. However, the features will be restricted as shown in
the table below.
The camera operates in c (Aperture Priority) mode even if the mode dial is at
e or b when the aperture is set to a value other than s.
Lens used
D FA, FA, F, A, M (lens
only or with auto
diaphragm
accessories such as
auto extension tube K)
6
D FA, FA, F, A, M, S
(with 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
The aperture remains open
regardless of the aperture ring
position. The shutter speed changes
c (Aperture
in relation to the open aperture but an
Priority) mode
exposure error may occur. In the
viewfinder, [F--] appears for the
aperture indicator.
c (Aperture
Pictures can be taken with the
Priority) mode
specified aperture value but an
exposure error may occur. In the
viewfinder, [F--] appears for the
c (Aperture
aperture indicator.
Priority) mode
Pictures can be taken with the
specified aperture value in the manual
aperture range. In the viewfinder, [F--]
c (Aperture
appears for the aperture indicator.
When depth of field is checked
Priority) mode
(Optical Preview), AE Metering is
switched on. Exposure check is
possible.
Pictures can be taken with the set
aperture value and shutter speed. In
the viewfinder, [F--] appears for the
a (Manual)
aperture indicator. When depth of field
mode
is checked (Optical Preview), AE
Metering is switched on. Exposure
check is possible.
Restriction