Canon F-1 Manual de início rápido - Página 5

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SELLING POINTS

Choice of

Three

Metering Areas

Many cameras feat ure

interchangeable

focusing screens. The new F-1, how-

ever, is the on ly one that also

offers a

choice

of metering sensit ivity patterns,

just

by chan

ing the sc reen.

There are three

different

patterns: cen-

ter-weig hted

average,

select ive-area

and spot

metering.

Div iding the 13 dif-

fere nt focus ing sc reens ava

ilab

le into

th ree groups yields a

total of

32 focus

ing screen-metering system

combina-

tions.

The ent ire series of screens is

available

for

center-weigh

ted

average

meteri ng and se lective-area metering

Six sc reens -

only

those

effect ive for

this specia lized metering method

are avai lab le

for

spot

meterin

Center-we

ighted

average meter ing is

idea

r AE

photograp hy, pa rtic ula rly

with wide-a ngle lenses. The degree

cente r-we ighting in the

horizontal

di-

rection

is si gnifican

y increased to

minim ize exposure difference between

vert

ica

and

horizontal

pos

itions.

Se lective-area me teri ng is

also

eff

ec-

tive for

photog

rap hy

and

stopped-

down

c lose- up

app lications

where precise exposu re of

specific

area of the image is necessa ry.

prox imate

12%

the view finder area

is metered. The 3%

spot

metering pat-

tern

is diffic

t to use, ye

yields spec

tacu

lar

resu lts.

Ideal fo

situa tions

whe re there is extreme

contrast

be-

twee

subject

and

backg

round.

New

screens inc lude two Bright Laser-

Maites

which

are

app rox.

20%

bri ghter than

the

laser

matte and the

Cross

lit

whi

facili tates

both

zo ntal and ve

ica

fo rmat foc using.

I I I I

I I

Se lective-area metenng

Spot metering

"Standard Microprism

Matte/Fres

nel

field

with centra

microprism

rangefinder.

For

general photography

with

all

lenses.

€)

New Split

itab le fo

genera

photog

raphy with

all

lenses. Split-image da rken

ing

does

not

oc-

cur

even with

slow

lenses.

(!)

Overall Laser Matte

Matte/Fresnel field with

clear matte

enab les

view ing and foc

usi

ng without distrac tion in

the ce nter. Ideal for mac

and te lepho

pho tography.

Laser Matte with Grid

Reference

lines aid

situations where

latera

and

vertical composition accu

racy

important, e.g.,

copy work and architectural

photog

raphy.

Especia

suited for the TS

35mm (Tilt

and

Shift)

Lens.

~ New SplitlMicroprism

Standard

the

new F-

Mu ltip urpose type

r all

lenses,

enab les

focusi ng

ith

the

split-image,

microprism,

matte field de-

pend ing

the

subject or your ow

pre-

fe rence.

Microprism/Fast Lenses

An exce

llent

choice when us ing fast lenses

(f/

1.2 to f/2.8)

Affords

easy,

extreme ly ac-

curate

focus ing.

Microprism/Slow Lenses

Similar to F,

but

for

slower maxim um aper-

tures

3.5

5.6.

Does

not incur prism

darkening.

~ Laser Matte with Scale

For

hig

h-magn

ification applications

such

close-up

photography

and

photomacro-

graphy.

With fine matte

center

and 1 mm

gradations on ve

rtical /horizontal lines

and

around

edges.

Laser Matte with Double Cross-Hair

Reticle

suited fo

app

lications req uiring high

magnifications

such as photomicrography

and

astrophotography.

To focus

move your

eye

from left to right. If the

cross-hairs stay

in the

same

position

the

subject,

the

subject is in focu

Bright Laser Matte/Short Lenses

Toge ther

with

the Bright

Laser

Matte K, the

brig htest

ree

ns of the

system.

Espec

ially

effective wi

th 50mm to

200mm

lenses

and

dark subjects

or when using small working

apertures.

Bright Laser Matte/Long Lenses

Provides the

same

unobstructed viewing as

the

Brigh

Laser Matte

Suitab le

for

300mm te lephoto

lenses

longer.

Also ef-

fective for photomacrography.

Cross Split

Divides the

subject both

horizontally

and

vertically.

Subject is in focus

when

the four

qua rte

merge to become

one

unbroken

image.

App licable

all

lenses.

~ A/B Size Laser Matte

The

reen for those in the publishing and

advertising

fields.

Engraved crosses in co

ners facilitate

cropping

Spot

Selective-area

Center-weighted average

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SG1-A5