Film cameras
Mamiya 645 AE Finder FK402 User manual
User manual for Mamiya 645 AE Finder FK402. 12 pages in English. Read the original PDF, download or print a copy without registration.
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Document details
- Brand
- Mamiya
- Model / document
- Mamiya 645 AE Finder FK402
- Document type
- User manual
- Language
- English
- Pages
- 12
- File size
- 1.4 MB
- Category
- Film cameras
- Document date
- Not specified in catalog
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Page 3 · Read text
AE Finder FK402 tL
The finder showsa laterallycorrectunreversedimageand is idealforaction
photography.The eyepiecefeaturesadjustabledioptercorrectionfrom +5
to -5.
Two meteringmodesare available,aperturepriorityauto exposure(AE) and
MANUALMETERING.
Four LED's (OrangeLED for AE mode, Green LED for correctexpo-
sureand two red LEDsfor over and underexposure)on the leftsideof
finder indicateexposurereadingsThe finder is very usefulfor quick,
sharpand accuratefocusing. .i
;*
HandlingPrecautions nthB ' h ;
1. The FinderFK402is exclusivelydesignedfor 645PRO camera and it
cannotbe fittedwithM645SUPERcamera.
2. Makesure that the finderis firmlyfixedon the camerabody.
3. Thereare 15 electroniccontactpinson the frontand lowerpartof the AE
finder. Should dirt'or greaseadhereto thesepins,electroniccoupling
may be impaired,resultingin malfunctionof the Finder'sAE metering.lf
the contactsneedcleaning,removethe finder and use a soft,cleancloth
to gentlyand thoroughlycleanthem.
4. The batteryin the camerabody is usedfor the meteringcircuitsof the AE
finder. Be sure to checkthe batteryfor properfunctionof the AE finder.
5. The eyepiecehas a built-in"dioptercorrection"device.Be sureto adjust
it for your eyesightbetorefocusing.
www.orphancameras.com
YView original page 3Page 4 · Read text
Namesof parts O nrober Eye-cup @ Oiopteradjustmentring @ flectronicContactpins @ tock ReleaseButton @ ntt"ching Latches @ nttachingpins @ Loct<ButtonView original page 4
Page 5 · Read text
Attaching and Detachingthe Finder
Attaching
Insertthe two AttachingLatcheson the front
of the finderinto the mountingholeson the
front of the camera body, as illustrated.
Then,depressthe finderuntilthe backof the
finderclicksinto placeand firmlylocks.
( F i g E )
Deraeh+nEr--
|. Pushthe FinderLock-ReleaseButtonwhile
f$r/) pushingdown on the buttonon the opposite
side.The finderthen can be removedfrom
the camerabody.1 fig E ) i'l
How to adjust the diopter to your eye
ri! In orderto obtaincriticalfocusing,adjustthe
dioptersettingfor your eye sight.( Fig E )
1. Rotatethe diopteradjustmentring until
you can clearlysee the lineson the camera's
focusingscreen.
2. Turn the lens FocusingRing untila target
appearssharpand clearand then make fine
adjustmentof the eyepiecediopterby rotat-
ing the diopteradjustmentring slightly.
3. Read the diopterscale and mark or bear
in mind of your own retainthe diopterpoint
for futurephotography.
www.orphancameras.comView original page 5Page 6 · Read text
UsingAE FinderFK4O2
1.To switchto the AE mode,align"A" on the Shut-
ter Speed Dial on the camera body with the white
indexline.
1ris.E)
2. Make sure that you have properlyset the speed
of the film whichyou haveloaded,on the ISO Dialof
your rollfilm holder.(Fig.E)
3. Beforemetering,makesurethat the lensA-M Le-
ver is set at "A". When set at "M", correctexposure
cannotbe obtained.Also make sure that the Expo-
sure MeterCouplerengagesproperlywiththe Aper-
ture Ring couplingPin. lf they are not engaged
properly,correctexposurescannot be obtained.
( Fig.E,E )
4.After setting the aperture the correct shutter
speed will be determinedautomatically,corre-
spondingto the selectedaperture.
In the greenLED will illuminatewhen the shutter
releasebutton is depressedhalf-way,the shutter
speedwill be fasterthan 1/60sec.
lf the shutterspeedis slowerthan 1/30sec.The un-
derexposuresymbol (V) will blink to warn against
possiblecameramovement.View original page 6Page 7 · Read text
1. Move the camera'sshutterspeed dial from the AE
modeto any otherspeedsetting,by pressingthe nearby
dialreleasebutton.(Fig E)
Read the finder displayswith the shutterrelease
buttondepressedhalfway.
2.In order to obtain a correctexposure,adjustthe
Lens ApertureRing or turn the ShutterSpeed Dial
untilthe Green LED illuminatessteadily.
" Please refer to the table 2 LEDs display at the
manualmode.
* The displaywillilluminatefor only 10 secondsand
will then automaticallystop to conserve battery
power.
(Ar:l rap,,h,gr. "
The AEL positionis very usefulwhen makingselec-
tive exposuremeasurementsof importantsubject
areaswhichare not in the centerof screen.This ap-
pliesparticularlyto subjectswith backlighting.
1. Set the ShutterSpeedDialon the camerabodyto
the AEL position.(Fig tr)
2. Whilelookingthroughthe finder, centerthe most
importantpartof the subjectin the centercirclewhile
keepingthe ShutterReleaseButtondepressedhalf
way. In this state, the exposurereadingis memo-
rized.After adjustingfor compositionas desired,re-
leasewww.orphancameras.comthe shutter.View original page 7Page 8 · Read text
[4] Mirror-upphotographywh€n using
AE Finder
In the AE positiofl"A", mirror-upphotographyin the
automaticmode is not possible.So duringmirror-up
operations,be sure to photographin the manual
mode.
O However,it is possiblein the AE Lock (AEL)posi-
tion. While pressingdown on the ShutterRelease
Buttonhalf way, raisethe Mirror-upLeverand then
releasethe shutter.lf, at this time, you leaveyour
fingeron the buttonfor even an instant,exposure
will immediatelylengthen.So, be carefulwhen tak-
ing photographsin that mode.( Fig lU )
O SinceTTL meteringis employed,exposurecor-
rectionis unnecessaryeven when lensaccessories,
such as filters,auto extensiontubes,bellowsand
macrolens,whichusuallyrequireexposurecorrec-
tion,are used.
O Ambientlightcominginto the finder throughthe
eyepiecewill hardly affect the meteringfor this
finder, but be sureto snuglyfit your eye on the eye-
cup to preventany incidentallightfrom entering.
O When the Self-timeris used with the finderin the "A" position,the expo-
surewill be determinedan instantbeforethe shuttergoes off.
When the Self-timeris used with the finderin the "AEL" position,the ex-
posurewill be determinedby lightconditionsan instantbeforethe Self-timer
was activated.
O The electriccontactslocatedon the frontand lowerpartsof the .finderare
very impoftantfor transmittingdata usedfor AE metering.In orderto ensure
correctAE finder functioning,make sure that all contactsare kept clean.
Beforeattachingthe finder,alwayscleanthe surfacesof thesecontactsus-
ing soft cleancloth.
O When the camera is not in use, turn the ShutterReleaseSelectorto the
Red Dot or "OFF"position.The ShutterReleaseButtonwillthenbe lockedto
preventaccidentalrelease.(Fig.l[ )View original page 8Page 9 · Read text
Usingthe AE viewfinderFK402with Leaf Shutter
lednses(A55mm,A80mm,A150mmN/L) :
1.ln the Focal Plane Shutter Mode (F)
As with lensesin barrel,performAE or manualphotography.(The lensshut-
ter speedis in the F position.)
2.In the Lens Shutter Mode
. AE-Mode
It cannot be possibleto performAE-Modephotography.
* Manualmode (Use AE finderas an exposuremeter.)
1) Set the determinedshutterspeedon the LeafShutterLensto the Shutter
Speed Dialon the camerabody.
2) After pressingthe ShutterBgJ_easeButton halfway,light up the Green
LED by rotatingtfre ApertureRing of the lens.
3) Set the shutter speed dial of the camera to 1/8 sec without fail before
usingcamera.
4) See instructionmanualwhen usingLeaf shutterlenses.
www.orphancameras.comView original page 9Page 10 · Read text
Checkingth"i E The AE Finder FK402 does not provide a batterycheck button. Battery strengthshouldbe checkedby pressingthe BatteryCheckButton"B.C."on lowerfront of the camera. LED Display in the finder AE mode (Orange) Overexposure(Red) Correctexposure(Green) Underexposure(Red) . AEL Mode- AE (orange)LED blinks . The Dark Slidein the Roll Film Holder- LED blinksslowlyView original page 10
Page 11 · Read text
How to distinguish LED displays in the finder.
1. Discriminationof the shutterspeed at AE Mode Displaysof three LEDs
will show you the shutterspeedat AE Mode.
Table-l LEDs Display at AE Mode
Shutterspeed EtrnEOan*$ Red O Green Q nec
ovef exposure Blinks8Hz BlinksBHz
1/1000- 1/500sec lumnates llluminates llluminates
1/250sec lumnates llluminates
11125- 1/60sec lumnates llluminates llluminates
1/3A* 1/15 sec lluminates Blinks2Hz
118* 1/2 sec luminates Blinks4Hz
1 - 4 s e c luminates Blinks8Hz
under exposure Blinks8Hz BlinksBHz
2. Correlationof exposurevalue betweenlens apertureand shutterspeed at
ManualMode:
Displaysof the threeLEDswill show conditionof exposuretime at Manual
Mode
Table-2 LEDs Display at Manual Mode
A neo O Green Fned
Out of meteringin high BlinksBHz
brightnessrange
More than +2 stops oler Blinks4Hz
+2 stopsover Blinks2Hz
+1 stop over llluminates
+1/2 stop over llluminates llluminates
Correctexposure llluminates
-112stop under llluminates llluminates
1 stopunder llluminates
-2 stopunder BI nks 2Hz
More than -2 stops under BI nks 4Hz
Out of meteringin low Blinks8Hz
brightnessrange
Bulb Blinks2Hz Blinks2Hz
www.orphancameras.comView original page 11Page 12 · Read text
I SPECTFTCATTONS
*Finder Finderin an unreversed,laterallycorrectim-
age
* lmage magnification: 0.79 x (with B0mm f/
2.8 N standardlensat infinity)with 94% fieldof
view
Meteringsystem : TTL center-weighted,open aperturemetering
Aperture Range : EVl (F2.8,4 sec) - EV19 (F22, 1/1000sec)
with 80mm f/2.8standardlens
Control system : ElectronicAperture-PriorityAE
Shutter Speed Range : A E : B s e c - 1 / 1 0 0 0 s e c
Manual . 4 sec - 1/1000sec (1EV step)
Exposure compensation : WithoutExposurecompensationdevice(lt can
be possibleto compensateby the film speed
(lSO)dialof the rollfilm holder'.)
Finder LED display : Glowingand flashingat 2,4 and 8Hz of four
LEDs indicateshutterspeed at AE mode 3nd
stateof the correctexposureat manualmode
AE Lock : When the shutterspeeddial on the camerais
set to the AEL position,the exposurereadingis
storedin the finder
Rangeof diopteradjustment: - 5 - + 5
Power supply : Batteryin the camerabodyView original page 12From the M. Butkus archive. Original publisher and archive notices are retained.
Check the model and edition against your equipment.
PDF verified 2026-10-10.