Durst M 670 COLOR Operating Manual - Page 6

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filter holder in place of the red filter for full-area integrated

readings with colour analysers or enlarging exposure meters.

To fit the diffuser, push the red filter out of its seating in the

red filter holder, insert in its place the circular diffuser

supplied and fit the retaining spring. The diffuser now swings

into the light path for full-area meter reading.

Centering the lamp in the Durst M

670

Before inserting a film, precisely center the opal lamp for even

illumination of the projected image on the baseboard. Proceed

as follows:

Switch on the enlarger lamp with the lens at full aperture

and without a negative. Check the projected area for shadows

or darker sections. If necessary centre the lamp by pushing

the lampholder (9) up or down or by turning it till all dark

spots disappear. Then secure the lamp holder (9) in the desired

position by screwing tight the milled screw (29).

Before adjusting the lamp check that you are using the

correct combination of lens, condenser and film masks or

glasses for the film size being enlarged.

Inserting film strips or single negatives

Dust and fingerprints on films show up disturbingly in

enlargements. So before enlarging clean any dirty negatives

with a sable or antistatic brush.

Remove fingerprints by gently wiping a fluffless cloth. Use a

film cleaning fluid for more persistent dirt. Insert only fully dry

negatives in the carrier. Take special care in cleaning so as

not to scratch the film's emulsion layer.

To insert single negatives fully pull the carrier out of the

enlarger head. Locate the single negative precisely over the

cutout to utilise the full image area. Then close the carrier

(which now holds the film securely in place) and push it into

the enlarger head.