Canon AE-1 - Manual (Page 54)

Stopped Down Metering
When tho AE*1 ii u$ed with Canon FD
photography can be performed with
throogh‘the-lem (TTL) metering and with AE
coupling. However, with the Canon FL lenses
and most accessories such as bellows, ex*
tension tubes, or a microscope adapter, it is
necessary to take a stopped-down meter
reading.
Stopping down the lens can be done by
pushing the stopped-down lever until it locks.
When the lens is siopped down. press the
shutter button halfway or depress the ex*
pcsure preview switch and adjust the aper­
ture ring ar>d/or shutter speed dial until the
meter rveedle inside the viewfir>der is aligned
with the stopped-down metering irxiex ntark.
Press the shutter button and the photo­
graph will be perfectly exposed. If the lens
should be mounted on the camera with the
stopped down lever locked, cotract exposure
wilt not be obtained. In this case, a red
warning mark by the stopped down coupling
lever inside the camera body is visible. After
removing the lens, on the lower part of the
camera body, just below the mirror, this
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