NPZ TAL-75R, Instruction Manual, Page: 13 / 21

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At high magnifications, along with
increase of visual sizes of the
object there is a growth of noises
of atmosphere, which appears as
roughness and blurring of images of
distant objects, blink and blurring of
stellar images.
Observations in the cold weather
are possible when all parts of the
telescope reached thermal equilibrium
with the ambient air.
There can be the nights with poor
images of celestial bodies because of
not serene atmosphere. It is possible
that at this time you will not be able to
observe details of the planets and the
Moon under such conditions.
Observations with the telescope
through the window are meaningless
as an uneven surface of window
glass distorts images.
Cover or replace the telescope into
a room when work is finished and to
protect it against precipitations.
Choose the sky object interest
you. Point the telescope tube in
the direction of the object. Using
a finder system, find an image of
this object in the tube’s field of view
and set the object in the centre of
the field of view with the help of the
viewing handwheels.

Visual
observations
Observations