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  • -HH

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    tr INSTRUCTION MAI{UAL

    FLASH METER IV

  • MINOLTA FLASH METER IVThe Minolta Flash Meter lV is the most advanced exposure meter available for measur-

    ing both flash and ambient light sources. By attaching the appropriate receptor, you cantake precise incident-light or ref lected-light readings.

    A large LCD data panel shows complete exposure information in both analog anddigital form. A built-in microcomputer and memory function make it easy to calculatethe exposure for highlights, shadows, or an average of two areas.

    The Flash Meter lV also features a special "analyze" function that lets you takereadings of flash and ambient light simultaneously. After taking a reading, you can varythe exposure settings to make either light source dominant.

    A wide range of accessories are available for your Flash Meter lV, including spot-metering attachments and external receptors for incident-light and reflected-light meter-ing. And if you use a Minolta (Maxxum) 7000 or 9000 camera, the Data Receiver DR-1000 enables remote control of the camera via infrared signals from the Flash Meter lV.With other carneras, the lR Receiver-Trigger can be used to trigger a flash unit by remotecontrol.

    Before using the Flash Meter lV, please read this manual carefully to learn about themeter's parts and functions. This way, you can begin to realize the full potential of theFlash Meter lV right from the start.

    I

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  • CONTENTSNAMESOFPARTS.

    ......2PREPARATION

    fnstallingtheBattery ......4

    Settingthe FilmSpeed. ........5AttachingaReceptor

    .,....SGENERALTNFORMATTON... ......6DATAPANELDISPLAYS .....10

    Digital Display ........11AnalogDisplay .....12GuideValueDisplay ........13

    AMBIENT LIGHT MEASUREMENTSShutter-Priority(T|ME) Mode. ....14Aperture-Priority (FNo.) Mode . ... .. .. .16

    FLASH MEASUREMENTS WITH A SYNC COFDShutter-Priority(T|ME) Mode. .......18Aperture-Priority(FNo.l Mode. ...20

    FLASH MEASUREMENTS WITHOUT A SYNC CORD-shutter-Priority(TIME) Mode. .......22

    Aperture-Priority (FNo.) Mode .MEMORYFUNCTION. ......26RE F LECTED.LIGHT CALCU LATIONS

    HighlightCalculations ......28ShadowCalculations ....29AveragedCalculations .....30Checking Other Areas of the Scene . . . . .31Changing the Highlight and Shadow Values . . . . .32

    EXPOSURE ADJUSTMENT . . . . . . . . . . .33MIXED LIGHTING: FLASH WITH AMBIENT LIGHT

    Analyze Function ..... .......34Fill-in Flash :.... .......36Comparinglncidentand Reflected-LightMeasurements,........37

    MEASUREMENTSFORAMOVIECAMERA .....38LIGHTINGRATIOCALCULATIONS. .....39GUfDENUMBERCALCULATTONS. .....40ILLUMINANCECALCULATIONS. ..,...41

    ExposureValueNumbers.... ........41INFRAREDREMOTECONTROL .....42GAL|BRATION.... ...:. .......43ACCESSORfES. . . . .. ... .. .44TECHNICALDETAILS .....46CAREANDSTORAGE .....47

  • NAMES OF PARTS

    Receptor head

    Memory clearInfrared (lR)transmitter window (421

    Data panel (101

    Memory button

    Strap eyelet

    Shadow key (29)Averaging key (30)

    ishlight key (281

    Measuring buttonMeasuring-mode switch

    Up/down controlFunction switch

    On/recall button (4)

    Sync terminal

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  • Reflected-light attachment (5)

    Data-transmission button (42(For use with Data ReceiverD R-1000)

    Shutter-release button (4(For use with Data ReceiverD R-1000)

    Tripod socket

    Battery cover(Measuring-level adjuster andbattery chambers A and B inside)

    Accessory-receptor j ack

    Analog-display switch ( 14)

    Digital-display switch (1 1)

    Normal/an dyze switch ( 14)

    Single/multi switch

  • PREPARATIONInstalling the Battery

    The Flash Meter lV's memory and measurementcircuits are powered by one AA-size battery that fitsinto battery chamber A. A 1.S-volt alkaline or carbon-zinc or 1.2-volt nickel-cadmium battery can be used.

    1. Remove battery coverby sliding it downward.

    2. Insert an AA-sizebattery into chamber Awith plus (+) and minus(-) ends as markdd inthe battery chamber.

    3. Realign battery cov-er and slide it upwardsuntil it snaps into place.

    o The meter will not operate unless a fresh battery isproperly installed.

    Infrared Tranrmitter' The Flash Meter lV has a built-in infrared trans-mitter for use with the optional Data ReceiverDR-lOfi) and or lR Receiver-Trigger units. lf you useeither, of these units, a battery must be installed inbattery chamber B. A 6-volt alkaline (4LR44, Eve-ready 537 or equiv.l or 6.2-volt silver-oxide (4SR44,Eveready il4 or equiv.) battery can be used. Seepage 42 for more information about using these units.

    Switching on the Data PanelThe Flash Meter lV

    does not have a powerswitch. Even with powersupplied continuously tothe meter's memory, thepower consumption isminimal. To conservepower, the Flash Meter lV automatically switch-es off the data panel display 4 minutes after taking areading or pressing a key. The most recent display canbe recalled at any time by pressing the On/Recallbutton. The display is illuminated for 8 seconds afterthe key is pressed.

    Automatic battery checkWhen battery power is

    low, the displays on thedata panel will blink whiletaking a measurement. lfthis occurs, install a new

    -.fI ralEara.arr?f!lltt

    ryh-550-battery. When the battery is / | | \ \completely exhausted, the data panel will remainblank even after pressing the On/Recall button.o When replacing the battery, remove the dead

    battery, press the On/Recall button to clear themeter's circuit, then insert a fresh battery.

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  • Setting the Film Speed1 . Set the functionswitch to "lSO" posi-tion.

    2. Move the up/downcontrol downward to de-crease the ISO settingand, upward to increasethe setting. Each timethe control is moved, theISO setting changes by1/3 stop. The settingchanges continuously ifyou keep pressing theup/down control.

    I ra 2 2ta ta t lt t. 2rlaattator-En *. ArElounfun

    ,C,\ U3. After setting the film speed, set the functionswitch to "TlME" or "FNo." to take a reading.

    NOTEo Any speed from ISO 8 to ISO 6400 can be set.o f SO 125 and ISO 125O are displayed as "lSO 12O"

    and "lSO 1200", respectively.o After taking a measurement, you can change the

    film-speed setting and the shutter-speed/f-numbercombination required for correct exposure willalso change.

    Attaching a ReceptorThe Flash Meter is supplied with two receptors: a

    spherical diffuser for incident-light measurements anda reflected-light attachment for reflected-light meas-urements. An explanation of how to take incident-and ref lected-light measurements appears on thefollowing pages.

    Spherical Diffuser for inci-dent light

    Ref lected-l i ght attachmentfor reflected light

    To attach a receptor:Align the white dot

    on the receptor with thereceptor index and insertthe receptor's bayonetinto the socket. Rotatethe receptor clockwise tosecure it.

    To remove a receptor:Rotate the receptor

    counterclockwise untilits dot aligns with recep-tor index and lift thereceptor out of the sock-et.

    AccessoriesThe reflected-light attachment supplied with the

    meter has a 40" angle of view. To take "spot" read-ings of smaller areas of a scene, Minolta's 5" View-finder or 10" Viewfinder ll can be used. The Boosterll is available for taking reflected-light readings off aview camera's groundglass screen or in very low light.

    Refer to pages 44 and 45 for more informationabout these and other accessories for the Flash Meterlv'

    5

  • GENERAL INFORMATIONlncident{ight Readings

    With incident-light readings, exposure is based on the brightness of the light falling on the subject. The sub-ject's reflectivity (how light or dark it is) does not influence the reading.

    Many photographers prefer to make incident-light readings because these readings produce very predictable,consistent exposures for most average scenes. Furthermore, this method is very quick and simple, and thus iswell-suited to determining the exposure in fast-changing situations.

    Taking Incident-light ReadingsAttach the spherical diffuser to the Flash Meter lV. The optional Flat Diffuser, Mini Diffuser, and the 4X and

    8X Spherical ND Diffusers can also be used.Move in close to the subiect so that you can measure the same light that is falling on the subject. Aim the

    diffuser directly at the camera lens. lf you can't get close to the subject, hold the meter in the opposite directionthat the camera lens is facing.

    In "AMBI" and "CORD" modes, take the reading by pressing the measuring button. In "NON.C" mode,press the measuring button to activate the meter, then trigger the flash unit to take the reading.

    Incident light metering Light source

    Camera

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  • Reflected{ight ReadingsWith reflected-light readings, the Flash Meter lV averages the light reflected from all subjects in the scene. Like

    all reflected-light meters, including those used in single-lens reflex cameras, the Flash Meter lV is designed to givethe correct exposure for a medium-gray tone.

    The assumption is that theaveragereflectance of the various light and dark tones in a scene would be about thesame as a medium-gray tone. In a wide variety of situations, reflected-light readings produce good exposures.

    A major advantage of taking reflected-light readings is that you can select which tones are most important anddetermine the exposure just for these tones. For example, a bright highlight or shadow area can be measured andthe exposure can be calculated to retain detail in that area {see pages 34 and 35).Taking Reflected-light Readings

    To take a ref

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