Filter
Top Products
Stop-Down Exposure
Measurement
When using a non-AI lens or certain close-up accessories, you
must push the meter coupling lever release button
@ and lock
the meter coupling lever
4
in
the
"u
p" position before mounting
a lens or attaching an accessory.
In
this case, the diaphragm
in
the lens does not link with the meter coupling lever on the
camera body. Therefore, you must perform stop-down metering.
The procedure
is
as follows:
For non·Allenses with automatic diaphragms
On
auto: Push the depth-of-field preview button ® all the way
in
and hold
it
as you trip the shutter.
Caution:
If the depth·
of
-field preview button is not depressed all the
way,
the mirror 9 may remain
in
the "up" position.
On
manual: Select a shutter speed. Then hold
in
the preview
button and turn the lens aperture ring
@ until the - + symbol
appears
in
the viewfinder. Release the preview button and take
the shot.
For non·Allenses or accessories without automatic
diaphragms
On
auto: Stop the lens down manually until the desired shutter
speed appears in the viewfinder. Then take the picture.
On
manual: Adjust the shutter speed or aperture until the - +
sign appears.
For fixed·aperture lenses, photomicrography,
or astrophotography
On
auto: No control
is
necessary; just take the picture.
On
manual: Adjust the shutter speed dial until the - + appears.
If correct exposure
is
unobtainable, use
an
NO
(neutral density)
filter or change the illumination to adjust the exposure.
41