NPZ TAL-75R, Instruction Manual

Page: 18 / 21

8
Resort to disassembling and
alignment of the optics follows in
cases of emergency and ONLY after
the warranty period.
The necessity in additional
alignment of the telescope can
appear after optics cleaning or
accidental misalignment.
Set the eyepiece with Barlow lens
and bushing into the eyepiece
tube to provide maximum power of
magnification.
Point the telescope to any star of
4
m
–5
m
stellar magnitude.
Untightening the screws, take off
a cover () and with the help of
four screws by shifting a diagonal
mirror achieve a diffraction image
of a star of concentric form.
Diffraction image must have a round
core and no more than two rings.
Gaps and form disturbances of the
core and ring are not allowed.
If the weather does not allow to
get the clear diffraction image of
the star, perform an adjustment,
orienting at a slightly out-of-focus
image, and the energy should be
spread equally around the core.
Such operations require certain
skills and qualification.
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Telescope alignment Storage