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Introduction
Validity of this
manual
Description
General
This manual applies to all Builder instruments. Where there are
differences between the various models they are clearly described.
Telescope
In regard to the instrument EDM, a Builder instrument may be
equipped with one of two types of telescopes, which offer the
same performance but differ in some technical details. The two
different types can be distinguished by a rectangular (telescope
type 1) or round (telescope type 2) shaped element, which is
visible in the centre of the objective lens. Where there are technical
differences between the two telescope types they are marked by
the following pictograms, referring to the first or second type
described above:
Builder
4
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