Durst DA-900 - Enlargement Range Specifications

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).