Dear enlarger,
I tried to obtain information about the SEG V (please note that the
"5" is actually a Roman cipher) from Carl Zeiss, but it proved to be a
dead end since the device is not in production anymore.
Fortunately, I found a document from the University of Berlin, with a
description of the technical features of the SEG V. I translated it
from German to English, and I hope it will prove helpful for you:
-- Carl Zeiss SEG V - Apparatus Description --
1. General
The SEG V made by Carl Zeiss is a rectifying enlarger with vertical
projection axis, which means that projection table, projection central
point and picture carrier are arranged vertically one upon the other.
The projection table can, due to its bearing in a spherical jacket, be
pitched by two components with the hand wheels nx (left hand wheel =
rotation by the x-axis) and ny (right hand wheel = rotation by the
y-axis). The picture carrier can also be pitched in two component
directions relative to the projection axis, and it can be moved in the
same component directions relative to the cartridge slide.
A lighting device, which can be moved in vertical direction by turning
the foot disc, provides in combination with a Fresnel lens a lucid
illumination of the picture.
The fixed objective (Topogon 1:6,3; f = 18cm) can be dimmed out from 1
: 6.3 to 12 : 50 using an adjusting wheel placed directly before the
objective. As automatic control units, the SEG V has a curve inversor
for keeping Newton's image equation, a spacial Carpentier inversor for
fulfilling the Scheimpflug rule, and a vanishing point calculator for
controlling the vanishing point according to Traekle.
The SEG V's main switch is situated at the left side of the socket.
After turning on the apparatus, 3-4 minutes are necessary for the
lighting device (mercury lamp) and the automatic vanishing point
control to get to operating temperature. After turning off the
apparatus, it may be turned on again after 3 minutes at the earliest.
Otherwise the mercury lamp could possibly be destroyed.
The apparatus has five adjustment options, of which two are automated
via the vanishing point calculator. In the following, the remaining
adjustment options are described:
2. Enlargement / Diminution
Enlargement and diminution are done by turning the foot disc
clockwise, resp. counter-clockwise. During exposing, unwanted
disadjustment of the foot disc can be avoided by using the fixing
bolt.
Reading and adjusting the enlargement factor (v) is done at the
lighted scale on the left part of the post, exacting at the completely
split scale at the upper part. The enlargement factor can be estimated
as precisely as two decimal places.
3. Table Pitch
Pitching the projection table is done using the hand wheels nx (left)
and ny (right) at the table. The picture carrier's pitch is,
controlled by the spacial Carpentier-Inversor, adjusted automatically
corresponding to the Scheimpflug rule.
If necessary, both hand wheels can be fixed with a fixing bolt during
the photographic work. The tangent values of the rotation angles nx
(left post, lower part of the split scale) and ny (right post, lower
part of the split screen) can be read with three decimal places as
degree of table pitch. For negative tangent values, it is necessary to
form the complement to 0.000.
Source:
University of Berlin: Entzerrung am SEG V, by Prof. Dr.-Ing. Jörg
Albertz and Dipl.-Ing. Michael Breuer
http://www.fpk.tu-berlin.de/~michael/photo_1/photo1.html
Search terms used:
zeiss "seg 5"
://www.google.de/search?hl=de&ie=UTF-8&oe=UTF-8&newwindow=1&q=zeiss+%22seg+5%22&meta=
zeiss "seg v"
://www.google.de/search?hl=de&ie=UTF-8&oe=UTF-8&newwindow=1&q=zeiss+%22seg+v%22&meta=
I am very sorry that it proved absolutely impossible to locate
additional information on the SEG V's technical data, and I hope that
this will be of value for you.
Best regards,
Scriptor |
,
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