Canon Lens FD400mm Camera Operating instructions

English

Edition

B*IIJ\&

Call

011

Canon

lens

FD400mm

f/4.5

S.S.C.

INSTRUCTIONS

fifflIDtaAlt

Canon

Lens

FD400mm

f/

4.5

S.S.C.

2

This lens

is

a super

telephoto

lens with a rear

group focusing system

that

Canon has just

developed.

As

far as optics are concerned,

this

400mm

lens has

the

fastest f/4.5 lens

speed

of

its kind

in

the

world and provides

superb image delineation. Moreover, it boasts

of

such features as light weight, compactness,

smooth focusing, and ease

of

operation.

These established characterises have resulted

in

a

400mm

lens which

is

suitable for hand-

held shooting

in

ordinary use. This lens

is

a

really new creation

brought

into

the

world

of

super

telephoto

lenses.

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FD400mm

F4.5

S.S.C

.

3

4

Main Characteristics

• New Focus Adjusting Device: Rear

Group

Focusing System

The

focusing adjustment is,

in

general, per-

formed by drawing

out

the

whole lens con-

struction. However, this lens has

adopted

the

focusing system which relies

on

the

rear group

of

the

lens,

in

which

one

part

of

the

rear lens

group moves while

the

front

lens group and

another

part

of

the

rear lens group remain

fixed. This rear group focusing system allows

the

heavy, large apertu re,

front

lens group

to

be firmly fixed

to

the

mount,

and allows for

focusing by moving

one

part

of

the

light,

small aperture, rear lens group.

As

a result,

operation

of

this lens has been

further

im-

proved because

of

the

reduced size

of

the

lens

barrel and simplified mechanism.

As

the

over-

all

length

of

the

lens does

not

change and a

minimum subject distance

is

as

short

as 4m

close-up shorts

of

a face can be

obtained

which will entirely

fill

the

picture frame

if

the

camera

is

held vertically_ This lens was

carefully designed

to

compensate for aberra-

tion and for high performance.

• Function Focusing Adjustment: Vari-pitch

Focusing Mechanism

In

the

conventional helicoid system,

as

the

protrusion

of

the

lens

is

determined according

to

the

rotation angle,

the

intervals between

the

distance scales become smaller when

focusing

is

required for distant subjects.

Another

drawback

of

the

helicoid

is

that,

since

the

depth

of

the

field

is

shallow, even

a slight error

of

the

focusing adjustment

leads

to

a blurred image. But,

the

FD400mm

uses a cam mechanism for

the

adjustment

of

the

lens. Hence,

the

adjustment

speed changes

according

to

the

curve

of

the

cam

in

order

to

allow enough space between

the

distance

scales

of

greater

than

15m_

This lens makes

finer focusing easier

as

it increases

the

graduation

in

the

focusing mechanism so

the

correct

focus can easily be identified and

the

possibility

of

distance adjustment errors

is

greatly reduced.

• Hand-Held Shooting

With

the

adoption

of

this new system, opera-

tion

is

greatly improved and hand-held shoot-

ing has become possible, because

the

lens

is

lightweight and well balanced. Of course,

stabilized hand-held shooting

is

obtained

when using

the

tripod

mount

.

• Excellent Optical Performance

Because

of

a well balanced design and pro-

perly adopted mechanism established through

the

use

of

the

fixed

part

of

the

rear lens

group, this lens has reduced secondary chro-

matic aberration

to

a minimum. It promises a

sharp picture image

in

every corner of

the

film.

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5

6

Specifications

Picture Size:

24

x

36mm

Lens

Construction

: 6 elements in 5 groups

Coating: Super Spectra

Coating

Angle

of

View

:

Horizontal

5·

10'

Vertical

30

30'

Diagonal 60

10'

Focusing System: 2 elements in 1

group

in the rear

lens

group

move

by

means

of

a cam

Distance Scales:

ft

13

to

200

00

m 4

to

50

L.ens

Mount

:

FD

mount

(with

mount

lock),

5 kinds

of

mount

signals.

Aperture

:

FL

type

automatic

aperture, manual

lock

available.

Aperture

Scales:

4.5

to

22

and " A"

mark

EE

lock

available

Depth

-

of

-

Field

Scales and

Inf

rared

Index

Mark

:

Available

Filter

:

34mm

Drop

-in

filter

. Rear

part

plug-in

sys-

tem,

with

lock

.

REGULAR

lx,

UV

lx,

R1

6x,

Y3

2x,

NO

4x

.

Hood:

Bui

lt

-in

Tr

i

pod

Mount

: Detachable

Size and

We

i

ght

:

Max

i

mum

diameter

94mm,

length

282mm,

weight

l,300g

(tripod

mount

100g)

Accessories: Lens cap

(commonly

used wi

th

the

F

D85

-

300mm

f/4.5

lens,

94mm

<1»,

exclusive

filter

(with

a

holder),

exclusive lens

case

.

Subject

to change

without

notice

.

Built

-in

Hood

1'Jl.i6~

7

-

I-"

Focusing

Ring

7

;t

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Y:..-:7

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Lock

amera

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tll:

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Filter

Holder

Camera

Position

Index

f:;t.~

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Ilt.>:tI1t.

Distance Scales

~gJII

§~

Istance

Index

,JII:tI1t.

7-(

)L.-7-

-;t;)L.-1;i'-

Clamp

Adjustment

Screw

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Mounting

on

the

Cameras

This lens can

be

mounted

or

dismounted

like

the

other

FD

lenses.

First

remove a

dust

cover

from

the bayonet ring, then

mount

the

lens

on the camera

body.

The bayonet ring

cannot

be rotated when the lens

is

dismounted

from

the camera

body

and

left

without

a dust

cover. When

the

lens

is

mounted

on

the

camera

or

the

dust

cover

has

been attached,

the

bayonet

ring can be rotated.

To

mount

the

lens on

the

camera

body,

please

rotate

this

bayonet

ring all

the

way

until

it

stops.

Filter Setting

There are

five

kinds

of

filters:

REGULAR

1

x,

UV

1 x, R 1

6x,

Y3

2x

and NO

4x.

The

filter

is

fixed

on the

holder

and

it

can

be

unlocked

by

pressing a pin

type

lock on the

filter's

top.

Simply

insert

the

filter

holder

into

the

filter

slot in the rear

part

of

the

lens barrel

to

automatically

lock

it

. When removing

the

filter

holder

from

the

lens barrel,

press

down

the lock pin

with

your

forefinger

and

pull

out

the

holder

using

your

thumb

and

middle

finger gripping

both

ends

of

the

holder.

Since this lens

is

designed

to

include

the

filter,

8

it

always

has

to

be

used

with

the

filter.

With

-

out

the

filter,

the

light

coming in may

affect

the

picture's

image. Therefore, even when

a

filter

effect

is

not

necessary,

the

filter,

REGULAR

lx

should

be

inserted.

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L 9

10

Tripod Mount

The

tripod

mount

is

designed

both

for

fixing

the

camera on

the

tripod

for

photography

and

for

better

balance in hand-held shooting.

When the clamp adjustment screw

is

loosened

counterclockwi~e,

the

tripod

mount

can

be

rotated around the lens barrel

so

that

the

camera

can

be

fixed

horizontally

and ver-

tically

.

Please

use

the

camera

position

indices

marked

on

the

mount

and

on

the

lens barrel

when setting the position. (The

horizontal

position

can

be

set according

to

the

distance

index.)

The

tripod

mount

can

be

opened

by

loosening

the

clamp adjustment screw

for

cleaning

or

changing

the

angle

of

attachment.

Hand-Held Shooting

Put

the

tripod

mount

on

the

palm

of

your

hand and focus using

your

fingertips.

Built-in

Hood

Please

make

use

of

the

built-in

hood

by

pulling

out

fully

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Focusing

Rotate

the

focusing ring.

Even

in

distance scales greater

than

15

meters,

the

focusing scale was set

to

increase gradually

to

make

the

use

of

this scale easier.

There

is

some allowance when set

at

infinity con-

sidering

the

focusing changes

due

to

low tem-

perature, so please make sure

to

focus while

looking through

the

viewfinder

at

infinity.

Depth

of

the

Field

The

scales for

the

depth

of

the

field are read

diff.erently as

the

speed

at

which

the

focusing

mechanism moves

is

changed

in

order

to

lengthen

the

intervals between

the

distance

scales more

than

15m. This

is

a different

system from

the

conventional helicoid

type.

The

indicated scales are from

15

meters sub-

ject distance up

to

infinity:

the

length will

be half when less

than

10

meters.

For

ex-

ample, f

/22

is

in

between 16 and 8, and 16

is

equal

to

the

position

of

8. However,

as

this

lens has a focal length

of

400mm,

the

depth

of

the

filed

is

very shallow requiring careful

focusing.

Infrared Index Mark

The infrared index mark

is

read like the·

depth-of-field scales. Under 10 meters, it

is

between 8 and 16. The infrared index mark

in

red

is

a focusing correction index mark for

use with black and white infrared film and a

red filter.

If

the

focus

is

adjusted

to

the

scale

of

20

meters, rotate

the

focusing ring

to

the

number

20

on

the

distance scale matching

the

red· index mark. This

is,

however,

not

applied when color infrated film

is

used.

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Various Couping Mechanisms

The

coupling mechanisms

of

this lens are

similar

to

the

other

FD

lenses. When

the

dust

cover

is

removed from

the

lens,

the

lens

cannot

be stopped down just by moving

the

automatic

aperture lever,

nor

can

the

bay-

onet

ring be rotated. These coupling

mechanisms work only when

the

lens

is

mounted

on

the

camera body.

The

following

description fills you

in

on these coupling

mechanisms:

1. Aperture Signal Lever

This lever transmits

the

automatic

preset

f/stop

to

the

exposure meter. It

is

coupled

to

the

preset aperture ring

in

the

same

proprotion. I n

the

case of

AE

photo-

graphy,

the

f/stop

value

is

determined by

the

signal received from

the

camera.

2.

Full

Aperture Signal Pin

This pin transmits

the

f/stopat

a full

aperture opening.

3.

Automatic

Aperture Lever

This lever stops down

the

aperture

to

the

preset position. When this lever

is

turned

clockwise

all

the

way, it will be locked

tor

manual aperture. Usually, manually ope-

14

rated

aperture

is

performed by pressing

the

stopped-down coupling lever

in

the

camera body.

4.

EE

Lock Pin

This pin locks

the

aperture ring of

the

lens

at

the

"A"

mark position. When using the

camera as designed for

AE

photography,

set

the

"A"

mark

of

the

aperture ring

to

the

aperture index while you press

the

EE

lock pin. This pin can only be used for

the

above purpose.

5.

EE

Switch Pin

When

the"

A"

mark of the aperture ring

is

set

to

the

aperture index,

the

EE

switch

pin comes

out.

But, this setting only allows

the

lens

to

be mounted

on

the

cameras

designed for

AE

photography.

6 Reserved Pin.

Aperture

Signal Lever

~

'Jf~-i5-v/

-(

-

Full

Aperture

Signal Pin

~1iJr1~%

1:::.

' /

Automatic

Aperture

Lever

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Canon Lens FD400mm Camera Operating instructions

Canon Lens FD400mm Camera Operating instructions

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