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A Lens Types
When using a CPU lens equipped with an aperture ring (0 320), lock
the aperture ring at the minimum aperture (highest f-number).
Type G
and E lenses are not equipped with an aperture ring.
When using non-CPU lenses (0 163), select exposure mode A or M and
adjust aperture using the lens aperture ring. If exposure mode P or S is
selected with a non-CPU lens, the camera will function in exposure
mode A and 7 will appear in the viewfinder. See page 318 for more
information.
A Non-CPU Lenses (0 163)
Use the lens aperture ring to adjust aperture.
If the maximum aperture of the lens has been
specified using the Non-CPU lens data item
in setup menu (0 163) when a non-CPU lens
is attached, the current f-number will be
displayed in the viewfinder and control panel,
rounded to the nearest full stop.
Otherwise
the aperture displays will show only the number of stops (F, with
maximum aperture displayed as FA) and the f-number must be read
from the lens aperture ring. Aperture for lenses not equipped with AI
mechanisms (non-AI lenses) is adjusted using the lens aperture ring.
Changes to aperture are not shown in the camera displays; use the sub-
command dial to set the camera to the aperture selected with the
aperture ring (0 168).