Ansco Memar Manual de usuario descargar pdf (Pagina 13)

depth of

field

scale

A

depth-of-field

scale is conveniently

Iocated on

the stationary lens mount at

the

front

of

the camera.

On each

side of

the center

index mark

are identical

markings which indicate the various dia-

phragm

settings from f/3.5 through f/16.

With

the

eamera

set at any

particular

distance, the depth

of

field for any

spe-

cific diaphragm opening can readily

be

determined.

The

tlepth

of

field is

that

distance between the trilo

lines reDre-

senting

the diaphragm

setting

being

used.

You

will

see that

with

the camera

set

at

8

feet, at f/16 tt'e

depth of

fleld

extends

from 4'

4"

to

45

feet.

At f/3.5,

everything

from 6' 9"

to 9'

11" will be

in focus.

If

the

indicated depth

of

field is in'

sufficient

to cover

the

proposed

subiect,

close

rlown

the diaphragm,

but don't

for'

get

to compensate

for

this smaller open-

ing by

increasing

the exposure

time.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 27 28

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