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FAA23051-R. 3248. A
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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 AFC+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 AF-c CH CL I AF-s I ,,MF
Non AF lens I Parallel Series +100ms Series +100ms Series +100ms Parallel Series Series +100ms m
Parallel Parallel Focus tracking Series
Cs s
Parallel Series
Parallel: Series: +100ms:
Controls film advance and mechanical charge motors simultaneously. Film is advanced after the completion of mechanical charge. Shutter is released in 100ms after the completion of film advance and mechanical charge operations.
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,(4) Filters for autofocus -
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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.
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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 `the filter after the regardless" of focus released"durifig this'. (5) Autofocus lock `bac~'and: fortfi"t& remove dust on cbinpletion of auto' f:lrn-loadin-g, mode selection. (Shutter can be - . . operation:) -,. ..'
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.
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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 (3) exposure compensation
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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 ., Multi-meter finder DP-20 AE action finder DA-20 6x high magnification finder DW-21 Waist-.l"evel finder DW-20 o x .x.. x ' ", Center.weight,e~, 0 o ,'X-. ' spot -. 0 " o ` .`o o --
i" ,,' .
(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.)
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I FAA23051-R.3248.A
Metering system is automatically changed in centerweighted 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 multimeter 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 See page MS. detect the reverse position.) (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. 5mmdiameter circle at the center of the viewfinder, equivalent to the area of the prism of the type K focusing screen.
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Angle: 90° * 1° < Normal position >
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FAA23051-R.3248.A
Camera top' side o
n \
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BV1 BVO
BV2
BV3 BV4 B
< Vertical position (film advance side is up) >
Camera top side+
H
BV1 BV2 BVO BV3 BV4 * ~o~~ide
< Vertical position (film rewind side is up) >
BV1 BV2 BVO BV3 BV4 EEl
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I FAA23051-R.3248. A
3.
Exposure control
(1) Programmed auto exposure modes (P, PH mode) P, PH mode with DP-20 multi-meter finder ,rnounted Item" Built-in CPU lens Non-CPU lens ; (including AF lens for F3) Shutter speed control ` i" P and PH modes are' available. ,. Automatically shifted to A mode Viewfinder "display also shifted to A mode Refer to the EV chart (controlled within the range of 30 to 1/8000 sec.) Indicated in l/2EV steps in the viewfinder Refer to the EVchart (controlled within the range of f-number (F-FO) of the lens mounted) . Indicated in l/2EV.st@pS in the viewfinder ,, .,, FEE -> q FEE appears:if the lens is not set to the aperture valuew ithin the range of 2/3EV. from the''smallest aperture setting. `" -, q Shutter release isnot locked. q Programmed exposure control is performed based on that aperture value as its smallest one. .. Shifted to M mode: " Shutter speed is set to "T" setting. c Stops down to the smallest aperture value (specified aperture value) q Neither shutter speed, aperture value, nor exposure mode are displayed in the viewfinder. "--" sign is dis@~ye,@ instead in place of shutter speed. Remains in P -mode when set to "X", "B" or other "settings. ~ HI or Lo sign appear's in the viewfinder ,.. . Shutter release is not locked. Description
Shutter speed display Aperture value control
Aperture value display . . . ,,.,,, Ale~t" display ---.,:
When shutter dial is set to "T" setting.
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Overexposure or underexposure
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FAA23051-R.3248.A
(2) Aperture-priority auto exposure mode (A mode) A mode with DP-20 multi-meter finder mounted Item CPU built-in lens Non-CPU lens (including AF lens for F3) Shutter speed control Shutter speed display Aperture value Aperture value display When shutter dial is set to "T" setting. Description A mode is available. A mode is available. This mode, operates with, virtually all Nikon lenses. Controlled within the range of 30" to 1/8000 sec. Indcated in l/2EV steps in the viewfinder Can beset to within the f-number (F- FO) of the lens. mounted. Optical direct reading Shifted to M mode: " Shutter speed is set to "T" " setting. q Stops down to the smallest aperture value (specified aperture value) q Neither shutter speed nor exposure mode are displayed in the viewfinder. "--" sign is displayed instead in place of shutter speed. Remains in A mode when set to "X", I "B" or other settings. HI or Lo sign appears in the viewfinder. .Shutter release is not locked.
Overexposure underexposure
or
(3) Manual exposure mode (M mode) M mode'with DP-20 multi-meter finder mounted --. Item Shutter speed Shutter speed display Aperture value control Aperture value display Exposure display Description Can be set to "T", "X", or 4 to 1/8000 sec. in lEV step. Indicated in lEV step in the viewfinder Can be set to within the f-number (F- FO) ,of the lens mounted. Optical direct reading Indicated in bar-graph, l/3EV steps within A 2EV ` M 7
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FAA23051-R.3248.A
(4) Shutter-priority auto exposure mode (S mode) S mode with DP-20 multi-meter finder mounted Item CPU built-in lens Non-CPU lens (including AF lens for F3) Shutter speed control Shutter speed display Description S mode is available. Automatically shifted to A mode Viewfinder display also shifted to A mode. Can be set to within the range of 4 to 1/8000 sec. in lEV step. Indicated in lEV step in the viewfinder Can be set to within the f-nufier (F- FO) of the lens mounted. Indicated in l/2EV steps in the viewfinder FEE > q FEE appears if the lens is not set to the aperture value within the range of 2/3Ev from the smallest aperture setting. q Shutter release is not locked. q Programmed exposure control is performed based on the assumption that aperture value is at its smallest setting.
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liperture value control Aperture value display Klert display
When shutter dial is "Shifted to M mode: setto "T" or"B''settin~ . ..Q Shutter speed is set to "T" or "B" setting. q Stops down to the smallest aperture value (specified aperture value) " Neither shutter speed, aperture value nor exposure mode are displayed in the viewfinder. "--" , or "- "sign is displayed instead in place of shutter speed. Remains in S mode when set to "X" or other settings. Overexposure or underexposure HI or LO sign appears in the viewfinder. Shutter release is not locked. When aperture control is necessary over the aperture range of the lens, specified shutter speed will not be shifted automatically.
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FAA23051-R.3248.A
(5) Film speed setting Manual film setting DX-coded film setting In DX mode
1S06 to 1S06400 1S025 to 1S05000 If camera back is closed without loading DX-coded film or patrone, "an LED indicator blinks to alert at 8HZ, and shutter release is locked and an auto film loading becomes impossible.
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If DX-coded film patrone is loaded, but the film speed is set manually, the camera gives priority to the manually set I SO number. (6) Exposure compensation Yo~ can comp&sate exposure within the range of * 2EV (in l/3EV steps) Nothing is displayed in the viewfinder when compensation value is set to O. Compensation value displayed does not include the compensation value due to accessories (MF-23, SB-24, etc.) (7) Auto exposure lock Since this function memorizes the BV value, the controlled exposure value and its display value will vary as TV and AV values change in P, PH~ A~ or S mode. Shooting is possible in this state. BV (fix) = A V + T V While exposure is locked, "EL" appears in the viewfinder (with DP-20 multi-meter finder mounted). When the simultaneous lock lever is being turned, auto exposure and autofocus can be locked at the same time by pressing the AF-L button. Shutter prerelease timer is delayed while pressing the AE-L button. (8) If you turn the simultaneous lock lever to (*), then AEL and AF-L buttons work independently. If you turn the lever to ("*), then both auto exposure and autofocus can be locked at the same time when you press the AF-L button. EE
(9) Exposure related signals F-FO, FO, Fmin, from, (lo: Shutter speed dial 1/8000, . . . 4, X, T, B.
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I FAA23051-R.3248.A
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(11)
Shutter unit (Nikon's original development) Special tungsten-alloy shutter balancer absorbs vibration due to the shutter curtain travel. Dual multi-bladed curtain system: When shutter release button is fully depressed, the rear curtain goes up -> the front curtain starts traveling downward > the rear curtain follows the front curtain downward -> original dual-curtain formation. Aluminum-alloy blades: AL (aluminum) x 2 + CFRP (carbon fiber) x 2 " c: Carbon F: Fiber R: Resin P: Plate
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(12) T (time) exposure
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IC CFRP .-.---- CFRP--- AL ---.AL
2C AL ----.AL .---~g~ E CFRPl
Shutter curtain travels from up to down. X sync contact: Semiconductor trigger system same as that of F-801.
T operation = Set the shutter dial to "T" setting i Shutter release i Front curtain travels If "T" exposure is 32 seconds or longer: Power turns off, X contact turns off, and the LCD frame counter (FC) counts up +1 .
q q
Turn the shutter speed dial to any other setting to cancel "T" setting. i Rear curtain travels (This is not dualcurtain formation) + Press the shutter release button lightly. i The mirror moves downward, film is advanced
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! F~23051-R.3248.A
*If T setting .is canceled before shutter prerelease timer turns OFF, immediately the mirror moves downward and film advances in 32 seconds after shutter is released. Rear curtain sync flash photography ah T (time) setting is automatically switched to front-curtain sync. (Rear-curtain sync is impossible.) T (time) setting " Basically mechanical control. " Current flows to the Mg for 32 seconds after shutter is released at T setting. The power is ON for 32 seconds to activate the camera body for more than 20 seconds at "T''setting, because current flows for maximum 20 seconds in repeating flash mode of the SB-24. " Click sound may"be heard in 32 "seconds after releasing the shutter at T setting, this means that the shutter: curtain held by Mg is switched to that held by mechanically.
(13)
Self-timer
10-Sec. self-timer --------- Self-timer LED starts blinking at 2Hz during the first 8 seconds f and at 8Hz during the final two seconds. Cancel of self-timer ------ Turn the film advance mode selector to another setting. The self-timer mode is not canceled automatically when a self-timer shooting has been completed. B (bulb) ------------------------- Shutter speed is automatically set to 1/250 sec. at the "B" setting. T (time) ------------------------ Self-timer shooting is possible at "T" setting. AF and AE----------.=-----=---- Autofocus and auto exposure modes activate in self-timer operation. Autofocus driving is possible by pressing the shutter release button lightly in selftimer operation. AF-s .-. .- . . . . . . --- . . . . . . . . . --- -. . Shutter is released whether or not the subject is in focus, even in the AF-S mode, after the timer operation ends. Sequence ---------------------- Film advance and mechanical charge operations return to series driving when self-timer shooting has been completed. ,,-. (14 Multiple exposure' The multiple exposure lever returns to its original position after the exposure.
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FAA23051-R.3248.A
Frame counter and databack when taking multiple exposures. (with DP-20 multi-meter,finder) Body alone Frame counter of the body does not count up . LCD counter (in FD) does not count up. Frame counter of the body does not count up . LCD counter (in FD) does not count up. Frame counter of the MF-23 counts up. The frame number does not correspond to that of the body because the frame counter counts up every time the film advance switch turns ON and OFF. (This is mechanically unavoidable.) ? MF-24 camera back Frame counter of the body does not count up . LCD counter (in FD) counts up. Frame counter of the MF-24 counts up. Frame count-up signal is sent from the MF-24 camera back, therefore the frame number does not correspond to that of the body. (This is mechanically unavoidable.)
M??-23 camera back
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* Multiple data are imprinted when taking multiple exposures with a camera back mounted. * The MF-24 incorporates downcount frame number capability. This frame number-does not correspond to that of the body: 4. Motor drive sequence and film advance control
(1)
Motors Shutter charging motor takes care of mirror down operation, aperture, and charging the shutter curtain. Spool motor is in charge of advancing film. Rewind motor rewinds the film, and changes the filter of the autofocus module.
(2) Film advance mode CH : CL: High-speed film advance mode (max. 5.7 fps, F4S) Continuous low-speed film advance mode (focus tracking will be available in this mode) Continuous slow and silent film advance mode (low sound level oriented.) Single film advance mode.
Cs : s:
See section (3) on page M2 for the relation between film advance modes and autofocus mode.
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] FAA23051-R.3248.A
(3) Film loading and blank exposures @ Normal advance film loading. (Spool drive system) (Sprocket drive system when the FM-24 camera back is mounted.) @ Blank film advance Fully depress the shutter release button while opening the camera back to rotate the film take-up spool for a certain period of time. If film is loaded, approximately 0.5 frames are advanced on the spool. c Spool motor advances film by duty (pulse) -driving in order not to damage film perforations. q Film advance and shutter charging" motors work simultaneously. The shutter charging motor rotates to release film sprocke't stopper. Q Auto film loading (Film is loaded, camera back is closed.) Film automatically advances 2.5 to 3.5 frames at auto film loading. Film advance: Spool motor advances film by duty (pulse) driving in order not to damage film perforations. Film advance and shutter charging motors work simultaneously. The shutter charging motor rotates to release film sprocket stopper. Blank exposures stop when the frame counter switch is turned OFF. (Film advances to frame 1.) Duty ratio of the duty (pulse) driving changes as temperature and voltage vary.
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Auto film loading error
If blank exposures are not taken while the film detection switch is OFF, the film take-up spool rotates for one second and mechanical charging takes place three times (shutter charging motor rotates), the LED indicator lights up (alert LED), and the shutter release is locked.
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I FAA23051-R.3248. A
(4) Film advance and mechanical sequence @parallel drive CH
Shutter release
Current flows in shutter ~charge magnet. Shuttr release CL+CAF Mg-ON Mechanical shutter hold Ii Cs is released. Mirror latch Rear curtain returns Film is loaded. is released. (dual curtain shutter is released) I (Film detection Mirror moves up + switch is OFF) Aperture control system works ---- Camera back (Aperture PI works) Front curtain Mg is OFF. .~;%~".-. is closed. ................ (Front-curtain .~=N.w:.#.x::~~,fi.. Aperture Mg works. travels) ~Exposurei (Camera back ._ -- ..... w .:= t iiie7..~ f:fl;w.T..y%:-:~ ,switch is OFF) Rear curtain .. ... ... .. ...!. ... .. .. ... ... .. .. ... ... .. . Rea; curtain ..~fi.ll~...:.....:::. .-:vJq switch is ON Mg is OFF x==xsGX;X2S... . . i (;ear curtain Shutter charging motor rotates travels) (Charging switch is being OFF)
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I Mechanical charging Pulse plate rotates 1 Photointerruptor works. Pulse is generated (pulse number is counted.)
Shutter charginq cam rotates.- -
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(:::::::, charqinq lever) -
(Shutter Mg
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mechanical charae lever) Shutter Mg mechanical charge lever is reset. Shutter Mg mechanical charge
Sh~tter release control lever is lever is charged. reset. I 1 Shutter release Mir;or Aperture lever is moving control attracted down system : to operation is reset. : shutter starts. [3.4 ~ release lever, ; Mg aperture . I Mg]
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Fiim sprocket latch is released. Film advance completion switch is ON. I I Spool motor
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Shutter curtain is charged. Front curtain is reset [Front curtain control spring is cha~ged.]
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works.
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Mirror moving down operation is completed.
Mirror latch, stopper operates.
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; ~ : :
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Film advances.
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Film sprocket rotates as film perforation moves.
Cha;ging switch is ON.
control lever is reset. [Rear curtain return spring, rear curtain control spring is charged.]
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After countina 21 pulse numb;rs. (Mirror moves down) Exposure metering and focusing control start. *When the photointerruptor pulse is counted up to 21, the camera starts exposure metering and focusing operations because the camera recognize that the mirror has moved down.
I Sprocket cam
rotates.
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:ain :ch )FF .
Sprocket latch stopper works. " 1 Sprocket stops.
Film ~dvance completion switch is OFF.
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Spool"motor stops. Charging switch is OFF. Shutter charging motor stops. (Shutter charging cam stops rotating.) Total mechanical charging operation is completed.
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I FAA23051-R.3248.A
@Series drive CL s
Film is loaded. (Film detection switch is OFF) Camera back is
Shutter release
Current flows in shutter ~charge magnet. Shutter release Ma-ON Mirror latch is released. I Mirror &oves up + Aperture control system works (Aperture PI works) Aperture Mg works. Rear curtain switch is fiON
" ~Mechanical shutter hold is released. I
Rear curtain returns ` (dual curtain shutter is released)
" . y&&~~::w!!!fw: .$ .%: "-" ................
closed. (Camera back switch is OFF)
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Shutter charging motor operates (Charging swit~h is being OFF),
Front curtain Mg is OFF. (Front curtain travels) I Rear ,cu;tain Mg iS OFF (rear curtain travels)
,,.=fwj~ ?:y:fi;~.y+_:::N:i ~ExFo;ure.i
~;;:;...t. . . . .i.rn.e.~;j. . ......... ........... ::::::::::::::::,.:::::. . .*::l .:-fi:fi=~ . . . . ........... ..
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Mechanical charging Pulse plate rotates I Photointerruptor works. I Pulse is generated (pulse number is counted.)
1+.rror
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Shutter charging cam rotates. 11 i I ,. Sh&-ter I release Mirror lever M control repet. lever is charged. I Shutter t release lever is attracted Aperture to shutter control release system is Mg 23. reset. [3.4 lever, aperture
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(:::::::,
charging lever) Filmis rocket latch fs released. Film advance completion switch is ON.
(Shu~ter Mg mechanical charge lever) ---.--- ,
m f
Shu&ter curtain is charged.
moving down operation starts. I yo:llg operation is completed. Aft r ' counting 21 pulse numbers.
(Mirror
Front curtain Shutt'er Mg is reset mechanical [Front `charge curtain control spring is charged.]
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Shutt~r Mg mechanical charg& lever is reset.
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......................... 1 ' Mirror latch, stopper operate9 Charging is ON.
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........ :., . . . . . ,.. . . . . . n: /... ...{ I ..... Spool motor : : does not : rotate
Rear Curtain ~n~~g;tlevqk [Rear curtain return spring, rear curtain control spring
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Realr curtain
witch cOrrictly II
moves down )
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is charged.] I
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switch is OFF.
Exposure iwtering
and focusing control start.
: : C h a r g i n g ;witch -- Spool motor rotates. is OFF. Shutter charging
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motor stops.
Spool rotates.
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(Shutter charging cam stops rotating.) Total mechanical charging is completed.
I Film advances. Film sprocket rotates as film perforation moves. 1 Spko~ket cam rotates.
*When the photointerruptorp ulse is counted up to 21, the camera starts exposure metering and focusing operations because the camera recognize that the ~%rror has moved down..
Sprocket latch stopper works. I Spro;ket stops.
Film advance completion switch is OFF. I Spool motor stops.
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I FAA23051-R.3248.A
spool motor and shutter charging motor
Rear curtain travels. 8 1
Total mechanical charging is completed. I
Rear curtain switch
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Charging switch Shutter charging moto~
ON OFF ON
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, I Shutter charging cam rotates. Film adv~ce completion switch / is turned OFF :::% ;;:$:E:: I6 Fi"lm advances.
88
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~. . . . . . . . . . . . . . . . . . . . . . . . . Film advance completion switch Spool motor I ON OFF
Mechanical charge pulse
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84 to 94 pulses are output for one sequence. Detection of mirror down After counting 21 pulses, the ,carnera recognizes that the mirror is down, and starts exposure metering and autofocusing. Film advance and speed control of mechanical charge in Cs mode Film advance speed and mechanical charge speed are controlled by monitoring the output pulse of the mechanical charge.
(5
Detection of the end of roll If no film advance completion signal is output within one second after the completion of mechanical charge when film is loaded, a spool motor rotates for one second, and an alert LED lights up.Shutter release operation is locked. Completion of mechanical charge: Shutter, mirror, shutter release Mg, etc. are all charged. (Charge switch is OFF.)
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Film advance completion signal: q Same as the film advance completion switch. Film sprocket rotates when film advances through the `film take-up spool, and the film advance completion switch turns ON and OFF. Shutter charge cam rotates Film advance completion switch
`w (6) Film rewind Manual film rewind: Rewinds film after turning the film rewind lever RI. Auto film rewind: c Turn film rewind levers R1 (to release sprocket, RI switch) and R2 (R2 switch) to start automatic film rewinding. q During film rewind, an alert LED blinks at lHz. q Film rewind motor stops automatically in 1.5 sec. when film detection switch is turned from OFF to ON. (No film leader) q Film rewind motor also stops by manually releasing the R2 lever. " Film rewind time measured at ordinary temperature (20°C) when using 36-exposure film: Approx. 12 seconds (MB-20) ~ Approx. 8 seconds (MB-21) " Frame counter in the body counts backward. LCD frame counter in FD returns to frame number O just before the completion of film rewind operation. Open camera back to release the LCD frame counter.
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FAA23051-R.3248.A
You have the option to either leave the film leader in the camera or not by rewriting the data on the EEPROM memory chip. If you select to leave film leader, the film rewind motor stops immediately after the film detection switch turns from OFF to ON. Film leader leaves when rewinding film when the frame counter shows less than 1 (frame counter switch is ON) disregarding EPROM data. If you turn film rewind lever (R2) alone, an LED indicator (alert LED) blinks and alert at 8Hz.
(7) Shooting speed (Average values when using 36-exposure with fresh batteries and the shutter speed of 1/250 sec. or faster at room temperature (20°C) .
(frame/sec.) CH AF-c MF MB-20 MB-21 MB-20 4.0 5.7 4.0 CL 3.3 3.4 2.2 Cs 0.8 1.0 0.8 1.0
MB-21 5.7 2.9 -- b Shooting speed is not definite when setting in AF-S mode.
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8) Distance between frames (mm) Other than CS mode +0.2 2-0.4 +0.3 2-0.5
FAA23051-R.3248.A
Standard MF-24
CS mode +().7 2-0.9 ----------.
(9)
Sequence
errors blinks at 8Hz to alert in
An LED indicator (alert LED the following errors: Q
Mechanical charge sequence error: Mechanical charge pulse is not output for over 255ms during shutter charge completion switch turns ON until it turns OFF. Rear curtain sequence error: Rear curtain switch signal is not output in 300ms after rear curtain Mg is turned OFF. Aperture control error: Aperture pulse is counted more than 21 in 10ms after aperture Mg is turned ON.
@
@
@
Sync contact close error Sync contact has already been closed when power is ON. No LED indicator (alert LED) blinks in the following errors:
Q @ a
Power voltage drops below the rated voltage of DC/DC converter. Main CPU is hung up. Desired number of pulses (aperture value) is not output when controlling aperture. [In this case, this is compensated by shutter speed based on the number of pulses output (aperture value)] Errors from @ to @ will be stored in EEPROM (address 30) memory when error occurs.
5. Power source (1) Battery pack
MB-20
Alkaline-manganese batteries are acceptable. Reverse mounting preventive mechanism is provided. -- M 1 9
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I FAA23051-R.3248.A
MB-21 Alkaline-manganese, Ni-Cd, and Manganese batteries are acceptable, but some Ni-Cd models can not be acceptable due to the F4's reverse mounting preventive mechanism. Vertical position shutter release button, battery check function, remote connector and battery identification switch (changes battery checker level by selecting alkaline-manganese or Ni-Cd batteries) are provided. MB-22 Nikon AC/DC Grip unit in common with the MB-21. converter MA4 including regulator to convert 15V to 8.2V, and the AC/DC converter with 9-20v (3A or more) output power are available. Remote connector, and vertical position shutter release button &re provided.
MF-24G Battery holder and grip unit for MF-24.
(2) Battery pack contacts Viewed from the bottom of camera. .-
Power terminal (+) Power terminal (-) Shutter release signal contact Shutter prerelease signal contact Film advance signal contact (controlling MF-24) Battery identification contact Film back contact (detecting the loading of MF-24)
Contacts for each battery pack are as follows:
MB-20 :
MB-21 : MB-22 : MB-24G:
Q, a
Q@@@@ Q Q or o @ (but@is not effective) GQ@@o@o
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I FAA23051-R.3248. A
(3) Battery checker MB-20 is mounted: Checks battery by using shutter prerelease timer in the body side. Shutter prerelease timer prolongs 16 seconds: Battery is usable. Shutter prerelease timer prolongs O second: Battery is used up. No viewfinder display appears, shutter release is locked: Change batteries. MB-21 is mounted: See specifications of the MB-21. (4: Current consumption (when DP-20 is mounted at' ordinary temperature (20"C) using MB-20.) Under 5P when power switch is OFF. Under 10pA (approx. 100pA when film rewind lever R2 is ON) when power switch is ON (shutter prerelease timer is OFF) . Under approx. 180mA (when AF illuminator is OFF) and under approx. 220mA (when AF illuminator is ON), when shutter prerelease timer is ON.
"a @ @
(5) Continuous shooting time at the B (bulb) setting (using fresh batteries at room temperature) . Four hours (MB-20), and six hours (MB-21) with alkalinemanganese batteries. Three hours (MB-21) with Ni-Cd batteries. (6) Power source switch Use following dial and buttons to prolong the shutter prerelease timer: Shutter release button (prerelease, release) Exposure compensation dial Film advance mode selector Shutter speed dial Lens aperture ring (FFo signal) AE lock button Exposure mode selector AF lock button Key operations of other accessories (MF-23, SB-24, etc.)
P
--M21
--
I
6. Data back contacts @ Inspection contact
FAA23051-R.3248.A
@. Shutter prerelease/release signal contact @ Data imprint signal contact @ 1/0 contact @ DC 1/0 contact @ Clock signal contact ~. GND
--?422
--
FAA23051 -" R. 3248.
Time chart (stand-by film advance, blank shot)
Camera
switch
Shutter prerelease~ switch ""Shutter release switch Shutter charge motor Shutter. chafge completion switch I I
I
---
1
-
I
Braking time *(30msec.) Film take-up spool motor Film advance switch
I
I
T T2 -#b -
1~
Stand-by film advance
Frame counter switch
Approx. 25msec. >
i.-Fi_---l
-k
nm ------
--`7L`---r
n
I
---
Blank shot
`-f I
Blank shot is completed.
I
M23
- R.3248.A
Time chart (using AA penlight battery x 4, in CH mode, AF-C mode, at room temperature)
Shutter pre-r?lease switch CPU reset, data transfer
1
'100
to 150maec,
:&u:~hr release
(3 to 4 maec.~ Shutter releaae Kg lever Mirror up (approx. 35msec.) n Apexture stop-down
Mirror Aperture
- - - - -- -
~lycure atop
Delay time e Time lug ~--
Shutter cm-m in Wg is off
Opening shutte r
curtain Mg lever
Approx. 25maec.
Opening shutte F \C u r r e n t ~low~ curtain Closing shutte r curtaint4g lever M9i s off (2 . 5m9ec. )*
:Uyt:i: shutte r-'>urrent ~lowa -9 - 4
q
Shutter curtain
Closing shutter curtain signal (2.6msec.) -10 to 60msec. 1 I
Sync contsct 5.5 to 5.65d.sec . Closing shutte r curtain signal Shutter "charge completion :;~c;dvance . shutter charge motoll Film take-up spool motor Shutter charg e motor encoder e a 118 to 138msec. > ~ *
25maec .
I %
q
------ ---- -- -- -- ------ -- -- -- --
91.8 pulses, 164 to 167msec. *
q
M24