Durst M 670 BW Посібник з експлуатації - Сторінка 7

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When you insert film strips the negative carrier can remain in

the enlarger head. Slightly raise the top section (33) of the

negative carrier; it then stops in its open position. Now slide in

the film strip from the front. It is correctly located when the

strip abuts the locating pins (34) and the full film area appears

projected on the baseboard once you switch on the lamp.

Then close the negative carrier pressing the key (35) at the

top. Preferably cut the film into short strips to avoid scratching,

Turn the locating pins (34) into their front position for 24 x 36

mm films or into their rear position for No. 120 or 220 rollfilm.

The pins (34) must be turned fully forward or back, otherwise

the negative carrier does not close properly and could jam

in the enlarger head.

Lenses, lens boards and maximum image sizes

The table below shows the print sizes obtainable with different

negative or film sizes and the lenses and lens boards required:

Lens

Lens board

Film si2:e

maximum

Si2:e

(approx.)

minimum

100/105 mm

BOmm

50mm

35 mm

28mm

VEGATUB 39

SIRIOPLA39

SIRIOPLA 39"

SIRIOTUB39

UNIDISC

6x7 cm

(2'14 X

14 in,)

6X6 cm

(2'/4 X

2'/4 in.)

24x36 mm

26x26 mm

1BX24 mm

13x17 mm

18X24 mm

13x17 mm

Disc

40X50 cm

(16X20 in.)

4Ox50cm

40X50cm

40X50 cm

30X40 cm

(12X16 in.)

20X30 cm

(Bx 12 in.)

30x40 cm

3Ox40cm

24X30 cm

(9 '

X 12 in.)

9xi3 cm

(3 ' /2X5 in.)

9x9 cm

(3 '

3 '

in.)

9x 13 cm'

9x 13 cm"

9x13 cm'

9X13 cm'

9x13 cm'

The sizes indicated are paper sizes. Smaller enlargements

are possible (see minimum magnifications).

The 50 mm Schneider Componar C f/2.8 (new version in

plastic barrel) requires the SIRIOTUB 39 lens board.

NOTE: Lenses with M25 screw thread fit the above lens boards

via a FLARING reducing ring (available separately).

Vertical adjustment

Raise or lower the enlarger head with the knob and crank (36)

of the carriage. A rack-and-pinion drive ensures smooth

and precise vertical adjustment.

The wide profile column (2) makes the enlarger very rigid.

The column carries scales in cm and inches (37) and shows

magnifications (38) for the 50 mm, 80 mm and 105 mm lenses.

Focusing

Focus by raising or lowering the lens carrier via the friction

drive operated by the focusing knobs (39) at each side. Focus

at the full lens aperture on the paper holder or masking frame

placed on the baseboard. Insert a sheet of white paper of

the same size and thickness as the enlarging paper to be used.

Ideal is the back of a developed print. Rotate the focusing

knob until the image projected on the baseboard appears

sharpest. After focusing you may need to readjust the image

size (and refocus).