Takahashi e-130D, Instruction Manual

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■ Preparation of Telescope
Using the collimating eyepiece and
collimating tube will be a great help in
collimating theε-130D. The collimating
tube has a provision for the insertion of
a crosshair. Use nylon thread pulled
together taught and our small pieces of
tape to score the crosshair. Then these
stands can be glued for a permanent set
up. When collimation is necessary, a
process that is done during the day in a
bright lit room; the telescope can be
pointed at a brightly lit white wall or at a
translucent white sheet laid across a
window. Place the tube with the focuser
to the left as facing the light source. The
figure illustrates the set just described.
(It is suggested that if possible you
attach the ε-130D to the mount. This
will make pointing and leveling the OTA
and pointing it towards the light source
simple.) If you lose your orientation to
the movement of the secondary mirror,
place your finger over the opening of the
tube to regain your orientation. The
directions of the field of view correspond
to the numbers 1 through 4 on the
illustration.
■Adjusting the Secondary Mirror
The secondary mirror can be tilted for
collimation by slightly loosening the
large securing nut in the center of the
secondary assembly. Then the three
tilting screw can be adjusted after which
the securing nut should be tightened to
hold the adjustment.
■Collimating Marks
In order to allow the ε-130D to be more
easily Collimated, collimating marks
have been placed on the primary and
secondary mirrors.
Collimating Mark on Primary
Collimating Mark on Secondary
Four Vane spide
r
Securing Nut
Lock Nut
Secondary Mirror Holder
Collimating Mark on Secondary
Secondary Mirror