Durst M 670 COLOR Manuale operativo - Pagina 9

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The VEGAREPRO kit consists of a copying film holder

(Order code SIRIOREP) and the COPYLAM 4 lighting system.

The SIRIOREP (41) takes film holders for 6.5x9 cm

in.) sheet films. For further details see the

instructions with the Ourst SIRIOREP copying film holder.

IMPORTANT: When copying with the Ourst M

670 SW and

Ourst M 670 COLOR you focus and check the field of view

on the baseboard.

The UNIREPRO 670 kit consists of a camera arm (42) (Order

code NERIOCAM) and the COPYLAM 4 lighting system. With

this the Ourst M 670 SW or Ourst M 670 COLOR can serve as a

copying stand for a normal still camera. Remove the enlarger

head and attach the camera arm to the supporting stud for

the enlarger head.

The COPY LAM 4 lighting system takes four reflector floodlamps

of 100 or 150 watts (Order code FLU LAM 100 or FLULAM 150).

Black·and-white enlargements with the Ourst M 670 BW

Follow this procedure for making a black-and-white enlarge

ment with the Ourst M 670 SW:

(a) Place the negative in the negative carrier with the

emulsion side down;

(b) Switch off the room light and switch on the enlarger lamp;

lens at full aperture;

(d) Stop down the enlarger lens by two stops and swing the

red filter (43) into the light path;

(e) Insert the paper in the masking frame and check the image

location (the red filter protects normal black-and-white

enlarging papers);

(f) Switch off the enlarger lamp and swing the red filter out of

the way;

(g) Make a test exposure to establish the correct exposure

time. For instance make an exposure series of 1, 2, 4, 8,

16 und 32 sec. with a Ourst test strip holder or a Ourst

multi-print masking frame;

(h) Process, rinse and dry the test strip. Select the correct

exposure time from this test and set the exposure time

accordingly.

Note: You can also make black-and-white enlargements with

the Ourst M 670 COLOR by setting all filter dials (44) to zero.

The diffused light is equally suitable for black-and-white

enlargements; by using a more contrasty paper grade you

allow for the lower contrast of the M 670 COLOR lighting

system. This has certain advantages: The diffused light

suppresses the effect of dust and scratches and yields

enlargements of a greater tone range.

Note especially that diffused lighting does not affect image

sharpness. For sharpness depends exclusively on the quality

of the negative and of the enlarging lens.

Colour enlargements from colour negatives or transparencies

with the Ourst M 670 COLOR

The procedure for making a colour enlargement starts with

a zero correction print involving the following steps:

(a) Place the film with the emulsion side down in the negative

carrier (emulsion side up for enlargements on Kodak

Ektaflex and Agfachrome Speed materials);

(b) Move all filter dials to zero;

(d) Select the enlarged image size and focus (with the lens

at full aperture);

(e) Stop down the enlarger lens by two stops (with high-speed

enlarging papers you may have to stop down by three

stops);

(f) Switch off the enlarger lamp;

(g) Establish a correct exposure time by a test exposure

using a series of times (for instance of 1, 2. 4, 8, 16 and

32 sec.) with a Ourst test strip holder or a Ourst multi-print

masking frame.

Process, rinse and dry the test strip. Then select the section

with the correct exposure time on the strip and set this

time on the exposure timer. If none of the test exposures

yields an image of correct density take the best result as the

starting point for a further exposure correction:

Exposure correction with colour negatives

Print too light: Increase exposure time

Print too dark: Reduce exposure time.

Exposure correction with colour transparencies

Print too light: Reduce exposure time

Print too dark: Increase exposure time.

Usually the test print will also show a colour cast.

43--~