Attaching The Viewfinder; Focusing The Viewfinder; Collimating The Viewfinder - Meade 8" LX100 Series Instruction Manual

-19-
b.8
x
50 VIEWFINDER
(10" Lx100)
Each 10" LX100 Model telescope is supplied as standard equipment with an 8x50mm
straight-through
viewfinder. The bracket for this viewfinder is packed separately from the finder itself, and the 6
nylon
thumbscrews for collimation should be threaded into the viewfinder bracket, securing the viewfinder in
the
bracket. The
viewfinder
bracket
base
has
been mounted to the
main
telescope's
rear
cell,
and
will
accept
the viewfinder and bracket directly, allowing quick removalfor storage
See Fig.
13.
1)
Attaching the Viewfinder
To attach the viewfinder, simply slide the viewfinder and bracket into the base and tighten the
two
thumbscrews to a "firm"
feel.
WARNING:
Never use set screws on
any part of the
optical tube assembly, except those factory supplied
set screws included with the basic telescope or
with optional accessories. Longer, non-standard set screws
may protrude too
far
into
the optical tube and cause serious damage to the
primary
mirror.
2) Focusing the Viewfinder
The 8X50mm viewfinder has been factory
pre-focused at infinity.
Should this focusing need adjustment for
your eyes,
loosen the knurled collar
at
the objective lens-end
of
the
viewfinder (#3, Flg.
13), enabling rotation
of
the objective lens
cell (#2,
Fig.
13)
forward or backward for
precise
focusing.
Then tighten down the knurled
collar against
the objective lens cell to lock the
focus in
place.
Note
that
no
focusing
is
possible
or necessary
at
the
eyepiece end
of
the viewfinder.
3)
Collimating the Viewfinder
The
viewfinder
will
require alignment,
or
collimation,
with the
main
telescope.
Using
the 25mm
eyepiece,
point
the
main
telescope at some easy to find land object (e.9. the top of a telephone
pole
or
corner
of
a
building) at least 200 yards distant. Center
a
well-defined object in the main
telescope.
Then, simply
turn
the 6
nylon collimation lhumbscrews (#4, Fig.
13) until the crosshairs
of the
viewfinder
are
precisely centered
on
the
object already
centered
in
the
main
telescope. With this
collimation accomplished,
objects
located
first in the wide-field viewfinder will then
be
centered in the main telescope's field
of view.
.-_@__==_
(1) Bracket
Slide
(2) Objective Lens
Cell
(3) Focus Locking
Ring
(4) Collimation Screws
(5) Eyepiece
Fig. 13:8x50 Viewfinder
for 10"
LX100
Telescopes