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FAA23051-R. 3248. A
[
t"- .
Nikon NIKON CORPORATION
Tokyo, Japan
Nikon F4
I FAA23051-R.3248. A
SUPPLEMENT OF NIKON F4 SPECIFICATIONS
1. Autofocus
{1) AF detection range
EV-1 to EV18 (at" ISOIOO)
(2) AF mode
AF-c (continuous servo autofocus)
" Shutter can be released regardless of focus
status; in focus or out of focus.
q The camera continues focusing according to the
movement of the subject for as long as you keep the
shutter release button lightly pressed.
s The camera switches to focus tracking mode at AF-
C+CL. Shutter release timing in focus tracking mode
is after the AF sequence.
AF-s (single servo autofocus)
" Once the subject is in focus, the focus stays
locked. Shutter can be released.
. The focus stays locked for as long as the shutter
-
release button is lightly pressed.
MF (manual focus)
Focus aid operation is possible.
(3) Film advance and mechanical charge at each focus mode.
AF lens Non AF lens
AF-c AF-s ,,MF m
I I I
CH Parallel Parallel
CL Parallel Series Series Series Series Series
Focus +100ms +100ms +100ms +100ms
tracking
Cs Parallel Parallel
s Series Series
Parallel: Controls film advance and mechanical charge
motors simultaneously.
Series: Film is advanced after the completion of
mechanical charge.
+100ms: Shutter is released in 100ms after the completion
of film advance and mechanical charge operations.
-- M l --
. . * ,., ,! ,
I @AA23051-R.3248.A
,- .
(4) Filters for autofocus -
Two filters for normal shooting and AF illuminator are
incorporated which switch automatically according to the
shooting situation to improve AF actiracy by `eliminating
the error of illumination. (See below)
.,.
Q Filter will be switched when the spot metering value is
less than BV2 or over BV5 as described below while
pressing the shutter release button lightly under the AF
illuminator firing condition.
"a. AF'ill~mifia"tor' filter whefl the spot ketc!ring value
is ~2 Or less.
b ,. NormaI Shodting "filter whefi 'the spot metering value
.
is' BV5 or 0Vf3r.
.,
There is some difference ih'metering values "between "a"
and "b'? (as mentioned above) so that the filter is not
switched due to sligQt' variation of brightness.
The filter is hot switched when the shutter release
button is not lightly depressed(or shutter prerelease
timer is activated.) As a ~esult, `the filtei for normal
shooting will be switched to the one" for `Z#'illurninator
when the AF illumirhtor fitiingeondi%ion is satisfied.
`. AFilluniindtor firing conditions: ~~ ` - -
q The power is ON and the flash unit is mounted.
q Focus mode is set to AF-S.
q Spot metering value is less than BV2.
. . . * The `focus-does not "stay-locked. "
c AF lens .is mounted. . .,
(Z9 .
When the fil?kr moves `bac~'and: fortfi"t& remove dust on
`the filter after the cbinpletion of auto' f:lrn-loadin-g,
regardless" of focus mode selection. (Shutter can be
- . .
released"durifig this'. operation:)
-,.
(5) Autofocus lock ..'
With the AF-L;button or the autofocus lock button on the
lens side depressed, focusing operation will be locked,
AF display will be locked, and shutter prerelease timer
is extended. ..
-- M 2 --
-., . . . ..
I FAA23051-R.3248.A
2. Metering
(1) Exposure metering system
, -
TTL matrix metering,
TTL center-weighted metering and,
T T L s p o t m e t e r i n g
(2) Full aperture exposure compensation'
.
-
Electrical exposure compensation
(3) Metering range (at f/1.4, 1S0100)
EV O TO EV21 (up to EV16 + 1/3) with TTL rnatrix"'"metering.
EV O to EV21 (with ,multi-meter finder DP-20.), EV2 to 21
(with AE action finder DA-20) with TTL center-wei~hted
metering.
EV2 to EV21 with TTL spot metering.
(4) Metering mode and finders
Matrix Center- spot
., .weight,e~, -.
Multi-meter finder DP-20 o 0 0
AE action finder DA-20 x o ' " o
6x high magnification .x.. ", ,'X-. ` .`o
finder DW-21
Waist-.l"evel finder DW-20 x ' i" o
,,' . --
(5) Matrix metering (with multi-meter finder DP-20 mounted)
Metering algorithm pattern is about the same as that of
F-801
A pair of SPD matrix sensors (divided into three
segments) .
Matrix metering is activated when AF lens (built-in CPU),
AI lens, series E lens or AI lens is mounted. (Modified
AI is not available.)
-- M 3 --
I FAA23051-R.3248.A
Metering system is automatically changed in center-
weighted metering mode when a lens other than one of
those mentioned above is mounted, or no lens is mounted
in matrix metering mode. For further details, see your
instruction manual. `
Metering area and its output
Two matrix vertical sensors incorporated in the multi-
meter finder detect the vertical and horizontal position.
When the sensor detects the vertical position of the
camera, the metering output of the top and bottom of the
segments changes automatically. (The sensor does not
detect the reverse position.) See page MS.
(6) Center-weighted metering
Multi-meter finder DP-20 calculates the correct exposure
by using the metering output (BVO) of the SPD sensor.
(See page MS.)
Central-weighted metering concentrates 60% * 10% of the
metering of the meter's sensitivity. (Approx. 12mm circle
at the center of the viewfinder) .
AE action finder DA-20 calculates the correct exposure by
using the metering output of a cell of the SPD on the
upper part of the eyepiece.
(7) Spot metering
The spot metering sensor is incorporated into the camera
body . SPD is located in the AF sensor module.
The area metered is represented by the approx. 5mm-
diameter circle at the center of the viewfinder,
equivalent to the area of the prism of the type K
focusing screen.
-- M 4 --
f
I FAA23051-R.3248.A
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