Minolta Flash meter IV Manuale utente

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tr INSTRUCTION MAI{UAL

FLASH METER IV

MINOLTA FLASH METER IV

The 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 can

take precise incident-light or ref lected-light readings.

A large LCD data panel shows complete exposure information in both analog and

digital form. A built-in microcomputer and memory function make it easy to calculate

the exposure for highlights, shadows, or an average of two areas.

The Flash Meter lV also features a special "analyze" function that lets you take

readings of flash and ambient light simultaneously. After taking a reading, you can vary

the 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 remote

control.

Before using the Flash Meter lV, please read this manual carefully to learn about the

meter's parts and functions. This way, you can begin to realize the full potential of the

Flash Meter lV right from the start.

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CONTENTS

NAMESOFPARTS. ......2

PREPARATION

fnstallingtheBattery ......4

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

AttachingaReceptor .,....S

GENERALTNFORMATTON... ......6

DATAPANELDISPLAYS .....10

Digital Display ........11

AnalogDisplay .....12

GuideValueDisplay ........13

AMBIENT LIGHT MEASUREMENTS

Shutter-Priority(T|ME) Mode. ....14

Aperture-Priority (FNo.) Mode . ... .. .. .16

FLASH MEASUREMENTS WITH A SYNC COFD

Shutter-Priority(T|ME) Mode. .......18

Aperture-Priority(FNo.l Mode. ...20

FLASH MEASUREMENTS WITHOUT A SYNC CORD

-shutter-Priority(TIME) Mode. .......22

Aperture-Priority (FNo.) Mode .

MEMORYFUNCTION. ......26

RE F LECTED.LIGHT CALCU LATIONS

HighlightCalculations ......28

ShadowCalculations ....29

AveragedCalculations .....30

Checking Other Areas of the Scene . . . . .31

Changing the Highlight and Shadow Values . . . . .32

EXPOSURE ADJUSTMENT . . . . . . . . . . .33

MIXED LIGHTING: FLASH WITH AMBIENT LIGHT

Analyze Function ..... .......34

Fill-in Flash :.... .......36

Comparinglncidentand Reflected-LightMeasurements,........37

MEASUREMENTSFORAMOVIECAMERA .....38

LIGHTINGRATIOCALCULATIONS. .....39

GUfDENUMBERCALCULATTONS. .....40

ILLUMINANCECALCULATIONS. ..,...41

ExposureValueNumbers.... ........41

INFRAREDREMOTECONTROL .....42

GAL|BRATION.... ...:. .......43

ACCESSORfES. . . . .. ... .. .44

TECHNICALDETAILS .....46

CAREANDSTORAGE .....47

NAMES OF PARTS

Receptor head

Memory clear

Infrared (lR)

transmitter window (421

Data panel (101

Memory button

Strap eyelet

Shadow key (29)

Averaging key (30)

ishlight key (281

Measuring button

Measuring-mode switch

Up/down control

Function switch

On/recall button (4)

Sync terminal

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Reflected-light attachment (5)

Data-transmission button (42

(For use with Data Receiver

D R-1000)

Shutter-release button (4

(For use with Data Receiver

D R-1000)

Tripod socket

Battery cover

(Measuring-level adjuster and

battery 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

PREPARATION

Installing the Battery

The Flash Meter lV's memory and measurement

circuits are powered by one AA-size battery that fits

into battery chamber A. A 1.S-volt alkaline or carbon-

zinc or 1.2-volt nickel-cadmium battery can be used.

1. Remove battery cover

by sliding it downward.

2. Insert an AA-size

battery into chamber A

with plus (+) and minus

(-) ends as markdd in

the battery chamber.

3. Realign battery cov-

er and slide it upwards

until it snaps into place.

o The meter will not operate unless a fresh battery is

properly installed.

Infrared Tranrmitter

' The Flash Meter lV has a built-in infrared trans-

mitter for use with the optional Data Receiver

DR-lOfi) and or lR Receiver-Trigger units. lf you use

either, of these units, a battery must be installed in

battery 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. See

page 42 for more information about using these units.

Switching on the Data Panel

The Flash Meter lV

does not have a power

switch. Even with power

supplied continuously to

the meter's memory, the

power consumption is

minimal. To conserve

power, the Flash Meter lV automatically switch-

es off the data panel display 4 minutes after taking a

reading or pressing a key. The most recent display can

be recalled at any time by pressing the On/Recall

button. The display is illuminated for 8 seconds after

the key is pressed.

Automatic battery check

When battery power is

low, the displays on the

data panel will blink while

taking a measurement. lf

this occurs, install a new

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battery. When the battery is / | | \ \

completely exhausted, the data panel will remain

blank even after pressing the On/Recall button.

o When replacing the battery, remove the dead

battery, press the On/Recall button to clear the

meter's circuit, then insert a fresh battery.

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Setting the Film Speed

1 . Set the function

switch to "lSO" posi-

tion.

2. Move the up/down

control downward to de-

crease the ISO setting

and, upward to increase

the setting. Each time

the control is moved, the

ISO setting changes by

1/3 stop. The setting

changes continuously if

you keep pressing the

up/down control.

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3. After setting the film speed, set the function

switch to "TlME" or "FNo." to take a reading.

NOTE

o 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-number

combination required for correct exposure will

also change.

Attaching a Receptor

The Flash Meter is supplied with two receptors: a

spherical diffuser for incident-light measurements and

a reflected-light attachment for reflected-light meas-

urements. An explanation of how to take incident-

and ref lected-light measurements appears on the

following pages.

Spherical Diffuser for inci-

dent light

Ref lected-l i ght attachment

for reflected light

To attach a receptor:

Align the white dot

on the receptor with the

receptor index and insert

the receptor's bayonet

into the socket. Rotate

the receptor clockwise to

secure it.

To remove a receptor:

Rotate the receptor

counterclockwise until

its dot aligns with recep-

tor index and lift the

receptor out of the sock-

et.

Accessories

The 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 Booster

ll is available for taking reflected-light readings off a

view camera's groundglass screen or in very low light.

Refer to pages 44 and 45 for more information

about these and other accessories for the Flash Meter

lv' 5

GENERAL INFORMATION

lncident{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 is

well-suited to determining the exposure in fast-changing situations.

Taking Incident-light Readings

Attach 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 direction

that 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 Readings

With 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 give

the 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 the

same 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 and

determine the exposure just for these tones. For example, a bright highlight or shadow area can be measured and

the exposure can be calculated to retain detail in that area {see pages 34 and 35).

Taking Reflected-light Readings

To take a reflected-light reading, attach the reflected-light attachment. The optional Viewfinder 5o, View-

finder 10o ll can also be used. lf you use the Minolta Booster, Booster ll orSiner Boosterl, the spherical diffuser

must be attached to the receptor head.

Hold the meter near the camera lens and aim the meter's receptor at the subiect. The reflected-light attach-

ment has a 40o angle of view, so you may need to move closer to the subject so that the reading is not influenced

by the background.

To make it easier to aim the meter, the receptor head can be rotated up to 270".

In "AMBl" 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.

Reflected light metering

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