r
Whenever
a
lens
is removed, be sure to
put
on
the
dust
cap to
protect
the
various signal levers
and
pins.
r When not
in
use for
a
long
time,
protect
the
mirror
with
a
flange
cap.
Lens Signal
Aperture Signal
Lever : Transmits the
preset
f/stop of
the
automatic
aperture
to the camera
body.
lt
is on a I to
1
movement
basis
with
the
preset
aperture through lever
manipulation.
The aperture signal lever
is
operable
only
when the bayonet
mount ring is turned to the
attachment
position.
Full
Aperture Signal Pin: Transmits the full
aperture
stop
when a lens with
a
different full
aperture number is
mounted. lt also
performs
error compensation of the
full
aperture metering.
Automatic/Manual Aperture Lever: Stops down the
aperture to the
preset
position.
Clamp
it to the right
side
for manually
operated aperture.
EE Switch Pin
:
When
the
preset
aperture ring is set at the
green
mark
for
EE
use, the lens can
be attached only
to the
Canon
F-1. lf the lens
is attached to the
FTb, it
cannot be
set at the
green
mark.
Pin
:
Reserved.
r When the lens has been
taken off, the signal levers
and
signal-pin will
not move even
if the
aperture
signal
lever
is
moved.
36
Positioning
Index
/Red
Engraved
for FD
55mm F1.2,
FD
55mm Fl.2
AL\
\White
Engraved
for Other
FD
Lenses
./
/
Positioning
Pin
Red Dot
Mark
Coupling
Pin
to
Flash-Auto
Rine
A/B
Aperture
Signal
Lever
Pin
(reserved)
Full Aperture
Signal Pin
Automatic/M anual
Aperture Lever
EE
Switch
P!n
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