Nikon F Photomic-T - Depth-of-Field Preview Control; Using the Preview Button Safely

DEPTH.OF.FIELD PREVIEW CONTROT
The
button
locoted
on
the
cornero front
(Fig.
221
is the
instont-oction preview
control.
Press the bulton
ond
the
diophrogm
closes
down
to
the
operture you
selected.
This
permits
you
to see
the
depth-of-field
ot
"toking" operture,
or it
permits
you
lo
select lhe
"foking"
operture you
wont
on
the bosis
of
depth-
of-field.
Releose
the
button
ond the
diophrogm
instontly reopens.
The preview
controt is independent
of
the
shutter
releose
ond connot
couse occidentol
exposure.
Cqution !
Do
not
releose
the
shutter,
while
the
depth-of-field
preview
button
is being
depressed.
This will
couse
the
inside
reflex mirror
to remoin
in the
"up"
posi-
tion.
lf this should
hoppen,
moke o
"
blonk
"
exposure
ond
the
mirror
will
return
to normol viewing
position.
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