Ansco Memar Manual de usuario descargar pdf (Pagina 21)

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using

the

guide

numbers

To

find

the

col'rect

exposure,

divide

the

guide

llumber

by

the

distance

frorn

the

flashlamp

to

the

subject!

the

result'

ing

figure

wiil

represent

the

lens

open-

ing

required.

Example:

The

guide

num-

ber

for

a

PHS

or

Bantam

8

lamP

with

Supreme

fllm

at

1,z50th

is

80'

The

sub'

ject

is

10

feet

arvay,

therefore

80

-:

10

-

8,

use

f/8.

to

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