Canon AE-1 PROGRAM Instructions Manual page 60

With few exceptions (noted in the instructions
for the accessory) , stopped-down metering is
necessary whenever you insert an accessory be-
tween the camera and lens for close-up photo-
graphy. .
60
1. If you insert an accessory designed for
AUTOMATIC diaphragm control. such as the
Auto Bellows or Bellows FL, between the
camera and ANY lens, follow the steps (p. 57)
for stopped-down metering .
2. If you insert an accessory designed for
MANUAL diaphragm control, such as M
Extension Tubes or Bellows M, between the
camera and a NON-FD lens, follow the steps
(p. 57) for stopped-down metering . Turn the
A-M ring of an FL lens to "M" for taking the
shot (not necessary if Canon Macro Auto Ring
and Double Cable Release are used).
3. If you insert an accessory designed for
MANUAL diaphragm control between the
camera and an FD lens, unless you use the
Canon Macro Auto Ring and Double Cable
Release, first set the lens for manual dia-
phragm control before mounting it on the
accessory. Then follow the steps (p. 57) for
stopped-down metering.
Note
The instruct ion s w ith the access ory w ill tell yo u
whether or not manu al di aphragm cont ro l is neces -
s ary. The procedure differs according to t he ty pe of
lens . See page 62.