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Manual aperture control – Canon AE-1 User Manual

Page 91

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Manual Aperture Control

When

accessories

requiring

manual

aperture control are used between the camera

body and a lens, lock the automatic aperture
lever in the manual position before mounting

the lens.

I

Lock for Manual Aperture Control (1)

For manual aperture control, push the

automatic

aperture

lever

counterclockwise

until it stops and locks. When accessories such
as extension tubes are attached to a lens that
has been set for manual control, the dia­

phragm blades of the lens open or close as the

aperture ring is turned. To revert from manual

control, reset the automatic aperture lever in

its original position.

2

Lock for Manual Aperture Control (2)

There are some FD lenses with the

manual lock lever requiring a different pro­

cedure 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