Nikon 2170749 Instruction Manual - Page 16

About

Focus

and

Exposure

Focus,

exposure

and

the

metering

system

are

important

factors

in

taking

pictures.

Knowing

the

characteristics

of

each

helps

you

widen

your

photographic

expression.

Focus

and

depth

of

field

When

focusing,

depth

of

field

should

be

considered.

Depth

of

field

is

the

zone

of

sharpest

focus

in

front

of

and

behind

the

subject

on

which

the

lens

is

focused.

It

varies

according

to

shooting

distance,

focal

length

and,

above

all,

aperture.

Smaller

apertures

(larger

f-numbers)

will

produce

a

deeper

depth

of

field

where

the

background

and

foreground

become

sharper;

larger

apertures

(smaller

f-numbers)

will

produce

a

shallower

depth

of

field

where

the

background

becomes

blurred.

Exposure

Light

from

the

subject

passes

through

the

lens

and

is

sensed

by

the

film.

Light

reaching

the

film

is

controlled

by

the

shutter

speed

and

aperture.

The

proper

combination

of

shutter

speed

and

aperture

for

subject

brightness

and

film

sensitivity

results

in

the

correct

exposure.

The

PRONEA

S's

General

-Purpose

Program,

Auto

-Multi

Program

and

Vari-Program

automatically

control

shutter

speed

and

aperture.

In

Shutter

-Priority

Auto

exposure

mode,

you

can

manually

set

the

shutter

speed

and

the

camera

automatically

sets

the

proper

aperture.

In

Aperture

-Priority

Auto

exposure

mode,

you

can

manually

set

aperture

and

the

camera

automatically

sets

the

proper

shutter

speed.

Metering

System

As

the

proper

combination

of

shutter

speed

and

aperture

for

correct

exposure

is

determined

according

to

subject

brightness

and

film

sensitivity,

measuring

subject

brightness

is

very

important.

In

general,

brightness

inside

the

viewfinder

is

not

uniform.

The

PRONEA

S

provides

Matrix

Metering.

With

Matrix

Metering,

data

on

scene

brightness

is

detected

by

the

six

-segment

Matrix

sensor.

(With

IX-Nikkor

and

D

-type

AF

Nikkor

lenses,

the

PRONEA

S

camera

performs

3D

Matrix

Metering.

See

page

49.)

32

DETAILED

OPERATION

This

section

features

detailed

descriptions

of

all

camera

functions

—including

lens,

film,

focus,

exposure

and

more.

33

Nikon 2170749 Instruction Manual - Page 16

Detailed, Operation

Page 16 highlights