Lock for manual aperture control (2) – Canon AT 1 User Manual
Page 97
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
Lock for Manual Aperture Control (2)
There are some FD lenses with the manual
lock lever requiring a different procedure for
manual control setting. With these particular
lenses, the automatic aperture lever must be
turned
fully
counterclockwise
while
the
manual lock lever is brought to the "L"
position. Once this has been done, when the
lens is mounted on the camera, the diaphragm
blades will open or close by turning the
aperture ring. To revert from manual aperture
control, reset the manual lock lever at the
position of the white dot.
Lock for Manual Aperture Control When
Using the Macrophoto Coupler (3)
In close-up photography of high mag
nification with a lens reversed on the Macro
photo
Coupler, the automatic
diaphragm
mechanism
is
not
coupled,
you
must,
therefore, remember
to close
down the
diaphragm manually after having locked the
automatic
aperture
lever
in
the
manual
position as explained above in (1) and (2).
Then, fix the Macrophoto Hood on the lens
mount by turning the bayonet ring.