Gossen MetraWatt Luna-Pro sbc Bedienungsanleitung

GOSSEN

Luna-Pro

sbc

Instruction

Manua

7909-1057YO

This Luna-Pro

sbc

Instruction Manual

than just

instruction book - it

actually a short

course

the creative use of

exposure meter.

Section I offers "Basic Operating Instructions".

use your Luna-Pro sbc properly you need only read

and follow the simple instructions

this section.

Section

II,

however, moves a step forward -to

"Getting the Most Out Of

Your

Luna-Pro sbc." Here

you can really find out how to put the unique

versatility of your Luna-Pro sbc to work for you.

Section

III

gives you "Helpful Hints" for special

shootings -action, snow and sand, sunsets, night,

and more -the type of information you need for

that extra creativity.

And Section IV provides you with full details

the

"Accessories" for your Luna-Pro sbc -to turn it into

a true exposure system.

sincerely hope that this manual will be of help

to you and will answer most of your exposure

measurement questions.

it does not, feel free to

contact your specialist dealer.

addition, our Con-

sumer Service Department

available for help

with special requests.

Cong

ratu

lations!

You

now

own

one of the most advanced ex-

posure

meter,

the heart

the Luna-Pro

sbc

System.

The new Luna-Pro sbc System

the most flexible,

versatile and adaptable photographic light measur-

system ever devised, while at the same time

being very simple to use.

order to get maximum

benefit from the quality design and operating fea-

tures of this precision instrument, please take a few

minutes to

read

this instruction manual.

Your

new Luna-Pro sbc utilizes the latest advances

in silicon cell sensors and also high performance

electronic circuitry including integrated circuits

provide fast, accurate, repeatable readings under

the most difficult professional conditions.

The Luna-Pro sbc represents a most significant

development

Gossen GmbH, Erlangen, West

Germany, Europe's largest manufacturer of preci-

sion electrical instruments since

1919,

and one

the outstanding pioneers in exposure meter design

since

1932

Table of Contents

Section

Basic Operating Instructions . 5

a. Zeroing the Meter . . . . . . . . 5

Inserting&Changing the Battery 5

I.c. Setting the Film Speed . 6

d. Exposure Factor Scale . 6

Making a Measurement . 7

f. Reading the Scales . . . 7

Section II.

Getting the Most Out Of

Your

Luna-Pro sbc .

II.

Continuous or Stored Readings . .

II.

b. The Null Method of Measurement .

II.

c. Exposure Correction Dial .

Il.d. Footcandle Readings

with the Luna-Pro sbc . . .

II.

e. Carrying Case . . . . . . .

11.1.

Methods of Measurement . .

Il.g. Incident Measurement . .

II.

h. Reflected Measurement . .

II.

Scene Brightness Range .

lI.j. Color Crossover. .21

Il.k. Zone Systems . . . . . . .

11.1.

Film Reciprocity Failure

....

Il.m. Intermediate f/stops

...

Il.n. Intermediate Footcandle Values

and Exposure Time . . . . . . .

Section III. Helpful Hints . . . . . . .

Ill.a. Choosing Between Action Stopping

Ability and Depth-of-Field .

IIl.b. Snow&Sand .

IIl.c. Sunsets

Ill.d. Night Lighting . . .

I.e. Backlighting

. .

111.1

. Copying

.....

Ill.g. Excessive Skylight

Ill.h. Bellows (Extension) Factor

Section

IV.

Accessories . . . .

Section

Using Luna-Pro Attachments

Section VI. Appendix . . . .

Service

.........

. . .

Specifications . . . . . . . . .

Additional Reference Material

Operating Parts & Scales

Spherical Diffuser

Green Zero Check Point

Meter Needle

4. Power Switch

Cine Scale

Electronic Flash

Reference Mark

Battery

Test

Button

ASA IndexTriangle

Film Speed Scale

10. Exposure Correction Dial

11. Computer Dial

12. BatteryTest Zone

13. Exposure Correction Signal

14. ExposureTime Scale

15. Aperture Scale

16. Film Speed Setting Disk 17

17.

Exposure Value Scale

18. Exposure Factor Scale

Index Mark 23

19. Zone System Scale

20. Measuring Cell Window

(under diffuser)

. Zero Adjusting Screw

22. Table of Footcandle and '.

Lux Values

23. Battery Compartment Lid

Basic Operating Instructions

The following instructions are a quick operating

guide to the Luna-Pro sbc. For best results, also

read

the additional sections describing

detail the different functions of the Luna-Pro sbc.

La. Zeroing the Meter

With the battery removed, check to see that the

meter needle

(3)

rests

the green zero check point

(2)

not, turn the zero adjusting screw

(21)

until

the needle rests

the zero mark.

Lux

mit

Diffuso~

bei

DIN

'e'

appr

b. Inserting & Changing the Battery

Your

Luna-Pro sbc

supplied with a 9-volt battery

which fits into the battery compartment

the bot-

tom of the meter. Slide the battery compartment lid

(23) off and attach the battery to the battery clip

inside. Note that the battery can only be connected

one

way.

Insert the battery into the battery com-

partment and slide the lid back

. Check the

battery

pushing and releasing the power switch

(4)

and then pushing

and holding the battery test

switch (7). The meter needle should be well within

the battery test zone

(12)

I.c. Setting the Film Speed

Determine the ASA speed from the data supplied

the film manufacturer. Rotate the clear film speed

setting disc

(16)

the raised bars until the ASA

speed number

opposite the white ASA index

triangle

(8).

A detailed ASA film speed table

page

36.

Exposure Factor Scale

Check to make sure that the exposure factor scale

(10)

index mark

(18)

A more detailled expla-

nation of this useful scale

page

Making a Measurement

Select the method of measurement desired, either

reflected or incident. (For details

inciden1

reflected measurements,

see

section

II.

f. For

reflected readings slide the spherical diffuser

(1)

either side of the meter. For incident readings,

slide the sperical diffuser

front of the measuring

cell

window

(20)

unit

"snaps" into the detent.

Aim

the meter at the subject for a reflected light

reading or

the camera for a incident reading.

Depress

and

release the power switch

). Rotate

the computer dial

(11)

until the meter needle

over

the "0" null line.

Read

the desired combination of

f/stops and shutter speeds

the computer scales.

NOTE: When

you

release the power switch, the

value measured

that moment will

automati-

cally read,

and

electronically stored

the Luna-

Pro

sbc.

conserve battery life, the meter

switches itself off automatically after 30 seconds,

and

your measurement set

the

computer dial

remains for convenient

and

repeated reference.

For

continuous measurements,

see

page

10.

Reading the Scales

The Luna-Pro sbc has six scales used

give

you

information

ASA index, aperture, shutter speed,

cine speed, exposure value

(EV)

, and exposure

factor (EF).

addition, accessory clip-on scales

are available for direct reading of other light

measuring values such

footcandles.

The time, or shutter speed scale

calibrated from

1/4000 of a second to 8 hours

and

indicates values

follows:

Hours are indicated 8h, 4h, etc.

Minutes are indicated 30m,

15m

, etc.

Seconds are indicated

, etc.

Fractional seconds are indicated '2, '4, etc.

Note that each section

alternately colored from

the

adjacent sections for ease of reading. The

red

indicates the proper reading point when using the

electronic flash attachment. See page

34.

The ASA scale

calibrated

standard ASA values

from 0.8 to

100

,000 (100K). Intermediate values

are shown

short lines. A complete table listing

these intermediate values

page

CAUTION: Because of the extreme measuring

range of the Luna-Pro sbc, it

possible -under

exceptional conditions of very high

low light

levels combined with a very high or low ASA index

-that the computer displays both ends

the expo-

sure time scale (8h and 1/4000 sec.) When this

occurs, the CORRECT reading

will

the

UPPER

part

the scales!

EXAMPLES:

ASA 25,000 at HIGHEST LIGHT LEVEL:

Scales.show (above) 1/4000 sec. at

11128

but also (below) 8 hours at f/5.6 etc.

Obviously, HIGH ASA and HIGH light level add

to SHORT exposure -1/4000 sec.

f/128.

ASA 0.8 at LOWEST LIGHT LEVEL:

Scales show (above) 8 hours

f/2.8 etc.

but also (below) 1/4000 sec. at f/64

etc.

Obviously

LOW

ASA and

LOW

light level

add

LONG

exposure - 8

hours

at f/2.8.

The

apertu~e

or flstop scale

calibrated from fl

128

to f/

O.7.

Numerical values are shown

the scale

full flstop increments. Intermediate values are indi-

cated

short lines

1/3 stop increments. A table

of intermediate values

and

the mathematical

for-

mula for calculating f/stops are given

section

III.

The zone system scale indicates values from I

IX.These are the values commonly used

various

zone systems and represent a continuous grey

scale

print values ranging from black to white.

Further explanation

use

zone system scales

are given

Section

II.

The cine scale allows direct reading of apertures

for various cine speeds

rames per second).

These speeds correspond

actual exposure times

the exposure time scale only for cameras hav-

ing

standard shutter angles. For

cameras or

those with adjustable shutter angles, consult the

camera's instruction book for the equivalent shutter

speeds

and

read your exposure opposite that

speed

the time scale. Also note that some reflex

viewing movie cameras use beam splitters

pro-

vide a light path

the viewing screen. These beam

splitters reduce

the

light intensity

the film plane,

that a correction factor must

applied

the

indicated f/stop. Once determined, the correction

can

programmed into the exposure correction

dial.

(exposure value) scale

(17)

provided for

cameras with shutters calibrated

EV.

The Luna-

Pro

sbc

scale

calibrated from

-8

+24.

Numerical values

are

shown for full

values with

intermediate values indicated

short lines at 1/3

intervals. Exposure values

are

used elsewhere

several scales which will

explained later.

important

remember that a change of 1

equivalent

a change of 1 f/stop.

(exposure factor) scale

included for mak-

ing

exposure corrections when using filters, bel-

_ lows, extension tubes, etc.

calibrated for expo-

sure factors

64.

Detailed information

this

scale

section

II.

Getting the Most

Out of

Your

Luna-Pro sbc

The preceding condensed instructions gave you

information

the basic operating procedures for

your Luna-Pro sbc. However, this meter

extre-

mely versatile, and the following information will

acquaint you with the many creative possibilities

available to you when using your Luna-Pro sbc.

Il.a. Continuous or Stored Readings

The Luna-Pro sbc

capable of either continuously

reading or storing light values. For simplicity of ope-

ration, the

read

and hold method

used. For eva-

luation of different lighting levels such

when

using zone systems, the continuous method

used. Both methods are activated

the same

power switch.

operate the meter

the

read

and

hold mode,

the power switch

/OFF button index mark

(a)

must

aligned with the square switch position

indicator

(b).

Simply depress and release the

power switch. The meter will automatically read

and

electronically hold the value of the light level

present

the moment when the button was relea-

sad. Because advanced electronic circuitry

and

silicon blue cell are used

the Luna-Pro sbc, the

measurement

instantaneous with

memory or

lag.

This reading will

stored and available for a

period of

seconds after the button

released.

After the one minute period,the meter automatically

turns itself off, prolonging battery life. Additional

readings can be taken

any time

repeating the

above sequence.

operate the meter

the continuous mode, sim-

ply depress and hold the

/OFF button

in.

The

meter will now respond

all changes

light

values. For long term measurements, the

/OFF

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