Manual diaphragm control – Canon T 90 User Manual
Page 133
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<Manual Diaphragm Control >
Stopped-down
metering
is
necessary
whenever
you
insert
accessories,
such
as
Extension
Tubes M, between the camera and the FD lens
for close-up photography.
1)
Insert the slot of the accessory manual diaph
ragm
adapter
(optionally
available)
over
the
tip of the automatic aperture lever at the rear
of the lehs.
2)
Push
the
lever
counterclockwise
and
lower
the adapter into the groove,
3) Mount the lens as it is onto the accessory
Do not mount the lens with the manual diaphragm
adapter directly onto the camera or the Auto Bellows
etc
79
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