Instructions
Table Of Contents
Various Couping Mechanisms
The
coupling mechanisms
of
this lens are
similar
to
the
other
FD
lenses. When
the
dust
cover
is
removed from
the
lens,
the
lens
cannot
be stopped down just by moving
the
automatic
aperture lever,
nor
can
the
bay-
onet
ring be rotated. These coupling
mechanisms work only when
the
lens
is
mounted
on
the
camera body.
The
following
description fills you
in
on these coupling
mechanisms:
1. Aperture Signal Lever
This lever transmits
the
automatic
preset
f/stop
to
the
exposure meter. It
is
coupled
to
the
preset aperture ring
in
the
same
proprotion. I n
the
case of
AE
photo-
graphy,
the
f/stop
value
is
determined by
the
signal received from
the
camera.
2.
Full
Aperture Signal Pin
This pin transmits
the
f/stopat
a full
aperture opening.
3.
Automatic
Aperture Lever
This lever stops down
the
aperture
to
the
preset position. When this lever
is
turned
clockwise
all
the
way, it will be locked
tor
manual aperture. Usually, manually ope-
14
rated
aperture
is
performed by pressing
the
stopped-down coupling lever
in
the
camera body.
4.
EE
Lock Pin
This pin locks
the
aperture ring of
the
lens
at
the
"A"
mark position. When using the
camera as designed for
AE
photography,
set
the
"A"
mark
of
the
aperture ring
to
the
aperture index while you press
the
EE
lock pin. This pin can only be used for
the
above purpose.
5.
EE
Switch Pin
When
the"
A"
mark of the aperture ring
is
set
to
the
aperture index,
the
EE
switch
pin comes
out.
But, this setting only allows
the
lens
to
be mounted
on
the
cameras
designed for
AE
photography.
6 Reserved Pin.
Aperture
Signal Lever
~
'Jf~-i5-v/
-(
-
Full
Aperture
Signal Pin
~1iJr1~%
1:::.
' /
Automatic
Aperture
Lever
>
1i!I1IJ~')
v/-(-