Manual Diaphragm Control - Canon AE-1 Instructions Manual

stopped-down coupling lever becomes visible, Manual Diaphragm Control
as does the red mark in the case described
The insertion o f manual accessories or
above..
a macrophoto coupler between the camera
When FD lenses are directly mounted on
ard an
FD
lens requires setting the lens for
the
AE-1,
metering should always be done at
manual diaphragm control before stopped-
full aperture. Stoppeddown metering would
down metering is possible. The instructions
give the wrong exposure. The only exception
for the various accessories involved will tell
t o this rule is the use of noneoupled ac- you whether or not this is necessary.
cessories between lens and camera body. During stoppeddown metering, the
flashing
"M"
LED will appear in the view-
finder as usual when the shutter button is
pressed halfway t o indicate the aperture is
being set manually.
All FD lenses which lack a chrome
mount ring, with the exception of the
Macro lenses, are set for manual dia-
phragm control as follows:
1 . Before mounting the lens, insert the hole
of the accesrory manual diaphragm adapter
over the tip of the automatic aperture lever
at the rear of the lens. Push the lever t o the
right and lower the adapter into the groove
t o lock the lever in that position.
I
2.
Mount the lens onto the accessory. The
diaphragm will now open and close as the
aperture ring is rotated.
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