9
Mirrors’ effective areas are
covered with high reflection
aluminum coatings with protective
level.
All lenses surfaces are covered
with antireflecting coating.
The eyepiece unit includes a
focuser with an eyepiece tube.
Focuser consists of rack and
pinion. The pinion axis has focus
knobs, which help move the
eyepiece tube in order to focus
telescope.
To provide the smoothness
of TAL-150K and TAL-200K
telescopes focusers, hold the
left focus knob (1) with one hand
and turn the right focus knob (2)
clockwise (with a little effort) with
other hand.
Fix the position of the focuser,
if necessary, using the same
procedure.
The lens-focusing mechanism
of TAL-200K and TAL-250K
has friction-type. It includes the
axis with the handweel (1) with
the help of which moves the
eyepiece tube. The smoothness
of the tube is adjusted with the
help of the screw (2). The screw
(3) is used to fix the eyepiece
tube in a chosen position.
