Canon EF, Instructions Manual

Page: 49 / 68

P
Taking a Stopped-Down Meter
Reading
When you use Canon FL lenses or interpose bellows
units, extension tubes etc. between the lens (either
FL or FD lens) and the camera, it is necessary to
take a stopped-down meter reading. First, operate
the winding lever to cock the shutter. Unlock the
aperture ring from the 'A' mark and push the
multi-purpose lever in toward the lens until it stops.
The method then is not to check that the needle on
the right of the viewfinder screen is in the white part
of the scale, but to bring the needle, by operation of
the aperture and/or shutter speed control to the
center of the index mark in the viewfinder. Release
the multi-purpose lever and press the shutter button
to take a perfectly exposed photograph.
•
During stopped-down metering at small apertures,
it is very difficult to focus properly, because
depth-of-field is very deep, and the viewfinder screen
is dark. Therefore, focus first before taking a
stopped-down reading.
•
Stopped-down metering should not be used with
FD lenses (except in the case of interposing accesso-
ries such as bellows units between the lens and the
camera) since the Canon EF and its FD lenses are
designed for automatic exposure with light measure-
ment done at the maximum aperture.
The above photo shows the lever locked to stopped-
down position for your convenience.
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Stopped-down
metering index mark
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