Takahashi Mewlon-180C Instruction Manual page 13

3. If the object is not centered in the field
of view of both telescopes, adjust the
finder using the following method so that
the object is placed at the center of the
crosshair.
4. Loosen the lock ring as illustrated.
5. Loosen all three adjusting screws enough
so that the eyepiece can move freely.
6. Hold the visual back with one hand and
adjust it so that the object at the center
of the telescope is on the crosshair in the
center of the finder, looking through the
finder. Then, lightly tighten the lock ring
with the other hand.
7. By turning all three adjusting screws
with the Hex wrench, center the object
precisely at the crosshair. If the object
shifts as illustrated; loosen screw A and
tighten B & C screws to move the object
on the crosshair. When the object is
positioned on the crosshair, tighten the
adjusting screws firmly.
8. Finally, tighten the lock ring firmly and
lock the visual back.
* P l e a s e u n d e r s t a n d t h e r e l a t i o n s h i p
between the movements of the three
adjusting screws and the movement of the
object in the field of view, actually looking
into the finder.
*Please do the above procedures in the
daytime to be ready for observation at night.
*Wh en the fin d e r a l i g n me n t i s ma d e
by using a star, it will move during the
alignment procedure due to the movement
of the sky. Therefore, do alignment rapidly
or use an equatorial mount with the motor
drive running to keep the stars from
moving in the field of view.
A
B
Hex Wrench
Loosen
C