Pentax 500FTZ Operation Manual - Page 18

MANUAL

FLASH

When

the

Metered

Manual

mode

is

set

on

the

camera,

you

can

control

manual

flash

by

selecting

the

distance/aperture

combination

(if

used

on

non-KAF

2.

or

KA

F

-mount

camera,

the

AF

500FTZ

flash

unit

only

works

in

the

Manual

mode.)

The

flash

output

intensity

can

be

varied

in

6

steps

of

1/1,1/2,

1/4,

1/8,

1/16

and

1/32.

Shooting

Procedure

1.

Set

the

main

switch

to

[II.

2.

Depress

the

flash

mode

switch

until

the

indica-

tion

on

the

LCD

panel

displays

the

[M

1

/xx]

.

•

The

flash

output

intensity

can

be

varied

in

the

range

1/1

to

1/32

by

depressing

the

adjust

button.

Adjust

the

flash

output

intensity

depending

on

your

requirements.

Holding

down

the

adjust

button

changes

the

display

con-

tinuously.

16

TABLE

OF

GUIDE

NUMBERS

.ISOIOCP

S

.:

,

11;''..r1

ZioomintrOoititt

f',77

,

1

4

,-

,.

'

-

.4

?..

.,4

,

f.o

.

F44126i.;ti:

Zoortting,Pinition

mi.-,

,i4.i.,,.,:

54—'

'

-...

-

.

-

144;;...:`P.!.lis•-•

.

I/I

47

42

36

32

30

100

94

84

72

.

64

'

60

M

1/2

36

31

30

25

22

1

72

66

60

50

44

42

,

M

1/4

25

23

21

18

16

1

15

50

I

66

42

36

i

32

I

30

M

1/6

IS

46.5

15

12.5

11

1

10.5

1,

36

i

33

30

25

I

22

21

_i

M

1/16

12.5

11.5

10.5

9

8

1

7.5

25

I

23

21

,

16

I

16

15

M

1/62

9

8

7.5

6

5.5

!

5

18

16

15

12

,

II

10

3.

Adjust

the

zoom

position

according

to

the

lens

in

use.

•

With

an

FA

or

F

lens,

if

you

set

the

flash

unit

to

[A.ZOOM]

.

the

zooming

position

is

auto-

matically

adjusted.

4.

Find

the

right

guide

number

listed

in

the

"Table

of

Guide

Numbers".

Then,

calculate

the

aper-

ture

based

on

the

flash

-to

-subject

distance.

Example:

With

the

zooming

position

at

28mm,

flash

-to

-subject

distance

2m

and

the

film

speed

ISO100

1

If

the

flash

output

intensity

is

1/1,

find

the

guide

number

32

from

the

"Table

of

Guide

Numbers".

2

Divide

the

guide

number

32

by

2

(flash

-to

-

subject

distance).

The

lens

aperture

is

f/16.

5.

Set

the

lens

to

the

calculated

f-stop.

6.

Make

sure

that

the

flash

Ready

Lamp

is

lit

before

discharging

the

flash

unit.

rs

Pentax 500FTZ Operation Manual - Page 18

Manual, Flash

Page 18 highlights