Nikon Nikkormar FT3 Instruction Manual - Page 25
Browse online or download pdf Instruction Manual for Digital Camera Nikon Nikkormar FT3. Nikon Nikkormar FT3 32 pages.
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INFRARED PHOTOGRAPHY
- - - -
In infrared photography, the plane of sharpest focus
is slightly more distant than the one produced by
visible light and seen by the naked eye through the
viewfinder. To compensate for the shift in focus,
Nikkor lenses have a red dot or line on the
lens
barrel
near the color-coded depth-of-field index scale on
top of the lens. After focusing the image sharply
through the viewfinder, turn the focusing ring to the
left
until
the red
dot
lines up with the prefocused
distance.
For
example, in the picture
below
the SOmm f/1.4
lens has been focused at infinity
(00).
The focusing
ring is turned slightly to the left so that the infinity
mark appears in line with the red dot. When lenses
having a focal length of SOmm or less are stopped
down to f/8 or smaller, no adjustment is necessary:
at such small apertures and short focal lengths, lenses
have enough depth of field to compensate for the
shift in focus.
SilVER-OXIDE BATTERY
The Nikkormat FT3's meter
circuit
is powered by
a
single 1.S-volt
silver-oxide
battery located in the
battery chamber on the
camera
baseplate. When the
battery is
exhausted,
the meter will
cease
to
function
all at once. To
replace
the battery, unscrew
the
cap
over the battery chamber
with
a coin or similar object.
When installing
a
new battery
make sure
that the plus
(+)
side faces out.
Note: If the meter is
exposed
to bright light
at
below·freezing
temperatures
over a
long period of time, it may malfunction
or cease
to
operate
until the tempe:rature rises again. There·
fore, be
careful
not to leave the meter
on
for
more
than
three minutes
at a
time in
cold
weather.
Caution: Never throw discarded batteries into a fire.
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