Takahashi E-160ED, Инструкция по эксплуатации

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Rotate the secondary mirror
Secondary Mirror Mark
Primary Mirror Mark
Figure C-3
Figure C-4
Figure C-5A
Figure C-5B
Loosen and rotate the
secondary mirror, then
lightly tighten it by hand.
Turning the mirror 1.
Loosen the large knurled nut that holds
the secondary assembly to the spider
slightly by turning it counterclockwise.
This will allow the secondary to be turned
in either direction. The secondary mirror
assembly is tightened by turning the
nut clockwise. When the securing nut is
loosened, loosen the nut very sparingly to
allow the secondary to be turned, but not
too loose.
Moving the secondary mirror
2 .
Loosening the large knurled knob some
distance will allow the secondary to be
moved up or down in a parallel fashion for
better collimation.
Tilting the secondary mirror
3.
There are three screws with locking nuts
provided to allow the secondary mirror to
be tilted for collimation. In order to tilt the
secondary, it is necessary to loosen the
lock nuts. Loosen each slightly to prevent
the secondary from moving too much.
Refer to Fig. C-3.
Aligning the Secondary Mirror
ی
Turn the crosshair of the collimating 1.
eyepiece so that the lines are horizontal
and vertical. Make certain that the
telescope is pointing at the bright area.
Make certain that the telescope is pointing
at a white card or a window covered with
a translucent sheet.
If the optical axis is off, as shown in
2 .
Fig. C-5A, loosen the secondary mirror
securing nut and rotate the secondary as
shown in Fig. C-4.
Rotate the secondary until the reflection
3.
of your eye is centered in the crosshair.
Slightly tighten the securing nut. Refer to
Fig. C-5B.