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All FD lenses with a chrome Breech-
lock mount ring and FD Macro lenses
are set for manual diaphragm control as
follows:
1. Before mounting the lens, push the
automatic aperture lever at the rear of the
lens to the right where it auto-
matically locks.
2. Mount the lens onto the accessory as
usual. The diaphragm will now open and
close as the aperture ring is rotated.
Some of these lenses have an additional lock
lever. With these lenses, the automatic
aperture lever must be pushed fully to the
right and the lock lever pushed to “L” to
hold the automatic aperture lever in that
position.
When using a macrophoto coupler, the
Macro Hood must also be mounted onto
the rear of the lens.
You may avoid setting the lens for manual
diaphragm control when using manual
accessories or a macrophoto coupler by
attaching the Canon Macro Auto Ring and/
or Double Cable Release.
Be sure to reset the automatic aperture lever
to its normal position before using the lens
once more in direct contact with the camera.
In the case of a lens with a lock lever, switch
it back to the position of the white dot.
To meter when the lens is set for manual
diaphragm control, use the stopped-down
AE procedure.
Not For Resale
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