Durst Da-900 User manual

SPECIFICATION OF COMPONENTS AND OPERATING KNOBS

Serial

number

1)

2)

3)

4)

5)

6)

7)

8)

9)

10)

Description

Base

Projection board

Hexagonal screws

for

fixing the column in

the

base

Column

Enlarger head

Fi

Iter

drawer

Mirror

housing

DANOCON

50

twin

condenser

DANOCON

105

twin

condenser

DUONEG negative

carrier

11)

AUTONEG

negative

carrier

12)

13)

14)

15)

16)

17)

18)

19)

20)

21)

22)

23)

24)

25)

26)

27)

Lenses

with

their

lens board

Serial number plate

Angular bar on column

Lock

of

the quick-locking lens holder

Lens

carrier

Cable

with

plug

and

switch

Cover

of

the I

ight

hood

Fixing screws

for

AUTOCALO

Red

filter

wheel-grip

Shutter wheel-grip

Grip bar

for

opening the serial number plate

Condenser

grip

(DANOCON

50)

Hooks on the condenser mounti

ng

Condenser fixing bar

Pushing-bar

for

changing the lenses

Lamp socket

28)

Wheel-grip

for

vertical adjustment

of

the enlarger head

29)

30)

31) -32)

33)

34)

35)

36)

37)

38)

Locking screw

for

the enlarger head adjustment

Guide tracks

for

the heat absorbing

filter

Wheel-grip

for

focusing both the lenses

Lens carriage

Focus variator wheel-grip

Locking knob

of

focus

variator

Cross-slot screws

on

the base board

Green

filter

Steel bands

Page

2

3

4

5

4

5

6

7

4

10

14

15

18

19

20

DURST DA 900

A precision professional enlarger

for

all negative

formats

up to

20

x

3112"

(6.5 x 9 cm.) including 70 mm.

film;

lens

range

from

f =

28

mm. up to f = 105 mm.

with

automatic

focusing

for

two

lenses.

In purchasing the

DURST

DA

900 you have demonstrated

your confidence in

our

equipment. We

a-re

very

grateful

for

this.

At

the same

time

we

feel

it

our

duty

to

help and

advise you as

completely

as possible so

that

you may

obtain

full

use

of

the

extreme

versatility

of

your

DURST

Da

900. The

effortless

operation and

perfect

function

of

this

high capacity enlarger ensure you many years

of

un-

disturbed pleasure in

your

darkroom

work.

This manual gives you

step

by step

instructions

on

the

assembly and operation

of

your DURST enlarger.

It

is

defini-

tely

important

to

read

it

to

learn

quickly

all

of

the

functions

and operating

controls

of

your

new

enlarger. in

order

to

avoid unintentional damage

which

could

effect

your

gua-

rantee rights.

We thank

you

for your

confidence

Lens equipment

of the automatic

focusing system

Unpacking

2

The

DURST

DA

900

comes as ordered

with

two

lenses in

the

focal

lengths

of

either

28

mm. +

50

mm

..

75

mm +

50

mm

..

80

mm. +

50

mm

..

or

105

mm. +

50

mm. mounted

into

the

automatic focusing system.

The

lenses

must

not

be replaced or exchanged

with

others.

as

this

would require a

readjustment

of

the

automatic focusing system.

For shipping purposes

the

enlarger is disassembled

as

follows:

1 - Base (1)

with

attached projection board (2) and 4 hexagonal

screws

(3);

2 - Column (4)

with

enlarger head

(5);

3 - In a separate accessories cardboard box:

Mirror

housing

(7);

DANOFI

filter

drawer

(6);

DANOCON

50

twin

condenser (8)

for

the

lens combination f =

28

mm. +

50

mm.

or

DANOCON

105

twin

condenser (9)

for

all

other

lens combinations;

DUONEG negative

carrier

(10) complete

with

DUMA

17

R.

18.

26.

35

masks and DUOMO

17

R.

18.

26.

35

counter-masks

for

the

28

mm. +

50

mm.

unit

and AUTONEG (11)

for

all

other

combinations;

2 lenses

with

corresponding lens boards (12).

While unpacking, make sure that

you

grasp the column (4)

and

not

the steel bands (38)!

Packing material

dust

is

to

be removed

from

all parts and

the

lenses.

the

condenser and

the

negative

carrier

glasses should

be

cleaned

with

a

soft

brush

or

lint-free

cloth.

The

serial numbers

of

the lenses are engraved upon

the

serial

number plate (13)

of

the enlarger. The negative

carrier

also has

the

number

of

the enlarger engraved upon it. Should

the

numbers differ,

return specifying .exactly

the

serial numbers.

The column (4)

with

the

enlarger head (5) is inserted

into

the

base

(1)

from

above and fastened evenly by means

of

the

four

hexagonal

screws

(3).

Make certain

that

the

angular bar (14) on the

front

side

of

the column (4) is in

perfect

contact

with

the

base board (2),

as

otherwise

the focusing plane

will

not

coincide exactly

with

that

of

the

projection board (2). Only

after

this

has been done may you remove

the

cord! The lenses are mounted

with

the

enlarger head (5) in

its

lowest

position.

To

mount

them,

the

lock (15)

of

the

quick-locking

lens holder

for

the

respective lenses is pressed

to

the

rear and

the

lenses

with

the

lens board (12) are mounted

into

the lens barrel.

Then

the

lock (15) is released, so

that

the

lens is

now

firmly

seated.

While

mounting

the

lenses, make certain

that

the

marking upon

the

respective lens board (12) matches

with

that

of

the

lens

carrier

(16)

and

that

the

lens is seated properly in

its

cone.

11

1

Check

the serial numbers

of the lens

and

negative carrier

Assembly

3

Illumination

4

7

1.

Light sources

As a rule,

the

most

brilliant,

brightest

and

best

illumination

for

most

negatives is obtained by

the

combination

of

an

opal lamp and a

twin

condenser.

Normally

opal lamps

of

up

to

150

W. are used, although also

a

250

W. opal lamp may be used.

To

avoid intense heat,

the

AUTOCALO

heat absorbing

filter

can be ordered separately and installed.

It

consists

of

2 pieces in a positioning frame. AUTOCALO is inserted over

the

hereto provided gUide

tracks

(30)

into

the

mirror

housing and fixed

with

both

the

screws

(19).

Every opal lamp should be checked before use (glass

defects

or

dark

spots in

the

bulb may be seen by holding

the

lamp up against a

strong

light).

During

frequent

current

fluctuations and

after

long use,

combustion depOSits are formed

which

lead

to

uneven illumination.

For

this

reason

the

lamps should

be

checked

from

time

to

time.

After

more than

50

hours

of

use the opal lamps are

no

longer suitable

for

colour work.

The cable (17)

with

plug and

switch

pending

from

the

enlarger head

(5) is

for

connection

to

the

mains.

After

removing the cover

of

the

light

hood (18), the lamp is screwed

into

its

socket. Do

not

allow

the

opal lamp

to

burn needlessly. Expose only

with

the

light

switch

or a connected exposure

timer.

If

you already have

the

photographic paper upon

the

projection board

and

wish

to

match up

the

projected

picture

with

the paper

format

again, swing in at

the

wheel-grip (20)

the

red

filter

which

is located

above

the

negative carrier.

Instead

of

the opal lamp,

for

black-and-white photography you can

also use

the

DANOLI cold-light

unit

which

has a built-in

transformer.

With

its

diffusion

soft

type

lighting

it

is mainly suitable

for

work

with

hard negatives or

for

the

enlargement

of

pictures

where

absolute

sharpness is

not

desired. The DANOLI

unit

with

its

built-in

transformer

and orange

filter

is inserted

as

follows

into

the

enlarger head

(5):

remove

the

serial number plate (13)

after

having unscrewed

the

two

lateral screws. Then draw out

the

twin

condenser and

the

filter

drawer

(6).

Now

the

DANOLI

unit

can be inserted into

the

condenser

drawer.

The DURST

DA

900

can also be used

with

mercury

vapour lamps.

As these lamps are

of

slow

ignition, i.e.

they

need a

warming

up

5

6

period

after

having been switched off,

they

are

let

burning

while

in

use. Exposure is carried

out

by means

of

a built-in

shutter

which

is manipulated at the wheel-grip (211.

2. Condenser for the

28/50

mm. lens combination

The

DANOCON

50

condenser (8) is slid in behind the serial number

plate (13).

To

do

this

the serial number plate (13) is opened by draw-

ing

it

down

with

the grip bar (22). Take the

twin

condenser by

its

grip (23)

and

insert

it

upwards so

that

the

two

hooks (24) at the

rear

of

the condenser mounting hang upon the bar (25) which

adjusts the

height

of

the condenser when the lens is changed.

To

check

if

the condenser (8) is properly seated, push the pushing bar

(26)

for

changing the lens

to

the

left

until

its

stop, so

that

the lens

with

the long focal length is brought into the path

of

beams. While

doing

this

the

twin

condenser (8) should move downwards.

After

you

have mounted the DANOCON

50

twin

condenser (8), the enlarger

head (5) is brought

to

its

uppermost

position

and the lamp switched

on

without

a negative in the carrier.

With

one

of

the

two

lenses in

the

path

of

beams and open diaphragm, centre the lamp by turning

or

adjusting

vertically

as

well

as

forwards and backwards the lamp

socket (27) until the projected picture is completely and evenly

illuminated.

9

3.

Condenser for 75/50 mm., 80/50 mm., and 105/50 mm. combinations

The

DANOCON

105

twin

condenser (9) is mounted into the enlarger

head in the same manner

as

described in section

«2»

for

the DANO·

CON

50.

To

check

if

the condenser

is

seated properly, do the opposite

of

the

test

for

the DANOCON

50.

Raising the enlarg.er head (5) causes enlargement

and

lowering

it

causes reduction

of

the projected picture. By turning the wheel-grip

(28) in a clockwise direction the enlarger head (5)

is

raised; turning

it

counterclockwise lowers the enlarger head (5). Quick

and

easy

movement

of

the enlarger head (5) in both directions is performed

by a simple grasp

with

one hand.

To

do this,

first

disengage the wheel-

grip (28) forwards

and

upwards

to

phase out the

friction

drive. Make

certain

that

the locking screw (29) on the

left

side

of

the enlarger

head (5) is loose. With

this

screw the enlarger head (5) may be

29-~

» •

Setting

the

enlargement

format

7

8

locked in

position

upon

the

column (4) as necessary,

for

instance,

for

series enlargements.

Enlargement range

The

shorter

the

focal length,

the

larger

the

range

of

the

magnifica-

tion

factors

which

can be obtained

with

the

DURST

DA

900.

Here

we

give exact ·information on

the

individual lens focal lengths:

f =

105

mm.,

(for

negatives up

to

21jzx3l/z"

(6.5x9

cm.))

automatic

from

1.4

up

to

6.8

x lin. appr.

floor

projection

up

to

14.6

x lin.

appro

(with

manual adjustment)

80

mm.,

(for

negatives up

to

21/4"

sq.

(6

x 6

cm.))

automatic

from

1.3

up

to

9.9

x lin. appr.

floor

projection

up

to

21

x lin.

appro

(with

manual

adjustment)

75

mm.,

(for

negatives up

to

21/4"

(6

x 6

em.))

automatic

from

1.2 up

to

10.1

x lin.

appro

floor

projection up

to

21.3

x lin. appr.

(with

manual adjustment)

50

mm.,

(for

negatives up

to

35

mm. (24 x

36

mm.))

automatic

from

1.9

up

to

16.4

x lin. appr.

floor

projection up

to

33

x lin.

appro

(with

manual adjustment)

28

mm.,

(for

negatives up

to

314"

x

1"

(18 x

24

mm.))

automatic

from

3.3

up

to

30.5 x lin.

appro

floor

projection

up

to

60

x lin.

appro

(with

manual adjustment)

These linear magnification

factors

for

the respective enlarger head

positions

can be read

off

of

scales

which

are located on the enlarger

column (4)

for

the

focal lengths: f =

28

mm., 75/80 mm.,

105

mm.

and

50

mm. In

order

to

make

it

possible

to

return

the

enlarger head

(5) back

to

the same exact

position

for

later

enlargements, a

metrical

scale is also located on

the

column

(4).

If the

enlargement

format

of

the

projection

board (2) proves insuffi- Giant enlargements

cient, you can also

project

upon

the

floor.

In

the

section

«Setting

the

enlarger

format»

on

page 7 you

will

find corresponding

information

on

floor

projection

in

the

list

giving

the

linear

magnification

factors.

To

project

upon the floor, loosen

the

four

hexagonal

screws

(3),

turn

the enlarger head (5)

with

the

column (4)

180

0 and

insert

it

into

the

9

10

base

(1).

Do

not

forget

to

weight

down the projection board (2)

to

prevent the enlarger from tipping over. During floor projection focus

by hand operating the wheel-grips

(31

and 32)

for

the adjustment

of

the lens bellows.

If

the automatic focusing is required again, the lens

bellows

must

be locked again in the

correct

position.

In

case the minimum enlargement

with

the lenses delivered from the Reductions

factory is insufficient

(with

manual focusing), the reduction range

of

the

DURST

DA

900

can

be

increased

virtually

without

limit

by means

of

the special accessory extension tubes

DUTUB

and

DUTUB

II, so that

it

is unnecessary

to

give a

list

of

reduction factors.

Mounting the

DUTUB

extension tube

Remove the lens together

with

its

lens board (12)

and

mount the

DUTUB

extension tube in

its

place into the enlarger head (5). Now the

lens can

be

mounted into the

DUTUB

and

focused by means

of

its

knurled outer ring.

The

focus is fixed

with

the knurled locking screw

upon the

DUTUB

extension tube. As the mark

on

the lens board (12)

or the diaphragm index mark

must

be

exactly at the front,

it

may

be

necessary

to

loosen the

DUTUB

lens retaining

screw

to

bring the lens

into

its

proper position (then do not

forget

to

tighten the screw

again!).

DUTUB

1\

lens extension tube

for

reductions and macrophotography

If

greater reductions are desired than possible

with

the DUTUB, then

use the

DUTUB

II extension tube, which is also suitable

for

macro-

photography.

It

is mounted into the enlarger head (5) in the same

manner

as

the

DUTUB

extension tube.

DUTUB

I

DUTUB

II

11

Inserting

the negatives

12

If

negative

strips

are used, you need

not

remove the negative carrier:

simply

press

the

tension lever (a) and slide

the

film

in at

the

side

with

the

emulsion side facing down; then

let

the

tension

lever

(a)

loose,

thereby

pressing the

film

strip

flat.

To

advance

the

film, press

the

lever

(a) again.

If

single negatives are used,

on

the contrary

remove

the

negative

carrier

from

the enlarger head.

In

the

DURST

DA

900

the

following

negative

carriers

may

be

used,

of

which

one is delivered

with

the

enlarger, according

to

the

lens

combination ordered, as standard equipment, whereas the

other

is

available

as

an

extra accessory.

1.

.4,UTONEG

negative carrier

fo·r

all negatives

up

to

2%

x

30"

(6.5 x 9 em.) including

70

mm. film.

The

AUTONEG negative

carrier

is delivered

as

standard equipment

when

the

enlarger is equipped

with

the

following

lens combinations:

105

mm. +

50

mm.,

80

mm. +

50

mm.,

or

75

mm. +

50

mm. adjustable

by pairs. The AUTONEG negative

carrier

is equipped

with

masks

which can be

set

to

the

desired

format

or

to

the desired section by

turning

the

knurled knobs

(b).

In

the

tilting

section

of

the AUTONEG

negative

carrier

a threaded pin (c) is located on

the

left- and right-

hand sides

to

adjust

the

opening between

the

upper and

lower

sections

of

the

negative carrier. Single negatives are inserted by

removing the negative

carrier

and placing

the

negative between

the

single negative retaining spring (d) and

the

lower

glass plate. The

retaining spring can

be

slid back and

forth

for

the

different

film

sizes.

c

b d

b

AUTONEG

To

avoid

Newton

rings,

the

upper glass plate in the AUTONEG nega-

tive

carrier

can be replaced by a special glass plate

with

anti-Newton

rings coating (COSIGLAS OAN)

or

a glass-free

DUOMA

mask

which

comes in

the

formats:

12x17

mm.

(1/2x11/16")

RolleL

3/

4

x1"

(18x24

mm.),

11/16"

sq.

(26x26

mm.),

35

mm.

(24x36

mm.l.

and

21/4"

sq. (6 x 6 cm.) and

is

available

as

a separate accessory. For

this

the

upper glass plate in the

tilting

section

is

drawn

out

at

the

front.

2.

DUONEG

negative carrier

The DUONEG negative

carrier

is

for

enlarging

the

formats

12

x

17

mm.

(1/2x11/16")

Rollei,

3/

4

x1"

(18x24

mm.l.

11/16"

sq.

(26x26

mm.l.

35

mm. (24 x

36

mm.) and

21/4"

sq. (6 x 6 cm.)

completely

without

glass. For

this

purpose the

DUMA

mask

for

below

and

the

DUOMA

mask

for

above are available separately. The DUONEG negative

carrier

is inserted

into

the

enlarger head

with

the

opening

lever

(a) in hori-

zontal

position.

By

turning

the

knurled knob (b) on

the

right-hand

front

side

the

negative

carrier

is fixed

immovably

in

the

enlarger head.

In the

tilting

section

of

the

DUONEG negative

carrier

a threaded

o

c

o b

DUONEG

13

Enlarging plates

Automatic

focusing system

Focus

variator

14

is

located on the

left-

and right-hand sides

to

adjust the opening

distance

between

the upper and

lower

sections

of

the

negative carrier.

If

the

enlarger

is equipped

with

lenses

of

28

and

50

mm.,

the

DUONEG

negative

carrier

is

delivered

as

standard

equipment

and

that

complete

with

the

DUMA

masks

for

the

following

negative

formats:

12

x

17

mm.

(1/2x11/16")

Rolle'i,

3f4x1"

(18x24

mm.l.

P/

lI

;"

sq.

(26x26

mm.)

and

35

mm. (24 x

36

mm.).

To

enlarge

1314

x

2%"

(4.5 x 6 cm.) and

2V2

x

3112"

(6.5 x 9 cm.)

plates

the

specially

designed URAN

plate

holder

is available as a separate

accessory. The

format

inserts

of

this

holder

allow

the

enlargement

even

of

wet

plate negatives. The negative plane

of

the

URAN plate

holder can be adjusted

to

the focusing plane

of

the automatic focus-

ing

system

so

that

the

plate

holder

may also be used

with

the

automatic

focusing

system.

To

match up

the

focusing planes

of

the

plate holder

and

of

the

automatic

focusing

system,

project

a

test

negative upon

the

projection

board,

at

best

with

the

enlarger head in

its

uppermost

po-

sition.

If

the

test

negative appears unsharp,

adjust

the

height

of

the

plate

holder

by

turning

its

knurled focusing ring (a)

either

to

the

left

or

to

the

right.

This

is

then locked

with

the

screw

(b) and

the

URAN

plate holder

is

adjusted once

for

all.

a

URAN

The

DURST

DA

900

focuses

automatically

with

the

lenses

which

have

been adjusted

at

the

factory. The movable lens carriage (33)

must

be locked in

the

exact

position,

otherwise

the automatic focusing

system does

not

function.

The lenses are changed

by

grasping

the

pushing -bar (26) and never

by

grasping

the

lens

tubes

themselves.

The

lenses are adjusted

to

their

utmost

sharpness

of

focus. For

this

reason, do

not

loosen

the

screws

of

the

lens boards (12)

or

of

the

lenses

themselves.

If

you

desire

to

move

the

focusing

plane

to

a

point

higher

than

the

plane

of

the

projection

board,

it

is

possible

to

raise the focusing

plane up

to

10

cm.

(4")

by means

of

the

focus

variator

wheel-grips

(34). This is necessary

when

the

enlarging paper

(for

instance,

whqe

using so-called automatic exposure easels,

etc.)

is

not

in

direct

contact

with

the

base board (2). The locking knob (35) located

at

the

rear

at

the same

height

as

the focus

variator

wheel-grips

arrests

the

steel band and

thereby

holds the focusing plane in position.

This can be read

off

on

the

scale upon the enlarger column

(4).

If

you desire

to

enlarge

directly

upon

the

projection board (2)

again, be sure

not

to

forget

to

return

the

focus

variator

wheel-grips

back

to

their

original position,

as

otherwise

out-of-focus

pictures

will

result.

To

do

this,

loosen

the

locking knob (35)

slowly

and

gently

brake

the

return

of

the focus

variator

with

the

hand.

15

Manual adjustment

Colour enlargements

16

If

the

automatic focusing does

not

suffice at close range.

it

is possible

to

focus additionally by hand

with

the

wheel-grips

(31

and 32)

for

adjusting

the

lens bellows.

For colour enlargements. colour

filters

in

12

x

12

cm.

(4

3

/4"

sq.)

format

may

be

placed in

the

DANOFI

filter

drawer

(6).

Depending upon

the

focal

length

of

the

lens being used. the DANOFI

filter

drawer

is inserted

either

above or

below

the

condenser so as

not

to

prevent

condenser

vertical adjustment.

IMPORTANT: The DANOFI

filter

drawer

should only be

left

in

the

condenser

compartment

in case

it

gets used.

In

addition

the

DURST

DA

900

can be

fitted

with

a

colour

mixing head.

For

this

the

AUTOFARB adapter is required. This special accessory is

fastened

to

the

enlarger head by means

of

the

four

screws

which

are

delivered

with

it.

17

Copying

18

For

the

DURST

DA

900

copying equipment

for

plates and sheet

films

up

to

21/2

X

30"

(6.5 x 9 cm.) is available separately. This consists of:

1.

The URNOV copying cassette

which

consists

of

a closed frame

with

a ground glass screen.

With

the

URNOV cassette come

two

plate holders and

two

sheet

film

inserts

for

the

format

2112

x

30"

(6.5 x 9

cm.).

Reducing adapters

for

13/4

x

2114"

(4.5 x 6 cm.)

plates

and

sheet

film

inserts

for

13/

4 x 21/4" (4.5 x 6 cm.) are available as separate

accessories. A guide rail is provided

for

inserting

the

cassette and

opening

the

dark

slide.

2.

The

RILU

lighting

unit:

this

consists

of

two

hard-chromium steel

lamp supporting bars.

To

use

the

RILU

lighting

unit,

first

fasten

the

two

mounting clamps in

the

provided

drilled

holes

of

the

base board.

Proceed

as

follows:

loose

the

two

cross-slot

screws

(36), then lay

the mounting clamps

with

their

smooth side upwards over

the

two

drilled

holes on the base board.

To

fasten

the

mounting clamps use

the

two

cross-slot

screws

(36) and

the

two

screws

delivered

together

with

the

RILU

lighting

unit. Then attach the

two

clamping

sleeves

to

these. The

height

of

the

bars can be adjusted and

locked

with

a clamping screw. On each bar are

two

individually

controlled

lights

which

can be

slid

along

the

rod and can

be swiveled upwards. These take opal lamps

of

up

to

150

W.

Each

light

has a

diffusing

screen

which

provides even illumi-

nation

of

the

original. By using colour or polarization

filters

special

effects

may be obtained. The lamp supporting bars can

be

tilted

back

when

not

in use

so

that

they

do

not

interfere

with

the

enlarging

work. For

perfect

illumination

of

originals

of

over

12

x 16" (30 x

40

cm.) format, the RILAR special extension arms are available as a

separate accessory. These are placed between the

two

clamps on

the

base board (2) and the lamp supporting bars

of

the

RILU.

Durst DA-900 User manual

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