Before you use your STELVISION 70 for the first time, carry out
the following adjustments in day light for the best results. You
will be able to do this at night just before observations once you
have a better understanding of your telescope.
MOTION
The azimuth tension knob
must be just tight enough to allow for
smooth, frictionless movement from left-right. Once this tightness
has been adjusted, the panning handle can be used to maneuver
the STELESCOPE 70. This handle, located on the altitude axis that
moves up-down, makes swiveling the optics possible. The handle
should be unscrewed when maneuvering the telescope. It must be
tightened (without over-tightening) before release to ensure that
the tube remains stationary.
POINTING
Always use the eyepiece with the lowest magnification, i.e., the one
with the longest focal length (20 mm), to make pointing easy.
Pointing can be done by moving the tube via the panning handle.
To do this, aim at the target by placing your eye along the tube or
by using the red dot finder. (Make sure that the red dot finder is
correctly aligned: see
Aligning the Red Dot Finder
paragraph on
p.10).
Tighten the panning handle to lock the tube in place.
Twist the knob until focus is reached (see the following section),
and then center on the target in the eyepiece with more precision
by operating the height adjustment lever.
EYEPIECE PLACEMENT AND FOCUSING
To guarantee the quality of the images delivered by
STELESCOPE 70, the focus, i.e. the sharpness of the image, must
be properly administered. This can be done by turning the knob
located at the rear of the eyepiece holder. Choose a distant object
and point the telescope at this object to focus your eyepiece for the
first time (if the distance is too short, focusing will be impossible).
10. Insert an eyepiece and tighten the clamp screw.
Place your eye on
the eyepiece and turn the focus adjustment dial gently in one direction
until you find the sharpness range. If this does not work, turn the
dial in the other direction.
Once you find the sharpness range, you can refine the focus quality.
To do this, turn the dial back and forth to "frame" the area. Each
overshoot in either direction will be gradually reduced until you
stop at the sharpest point. This method will prevent your eye from
getting used to an otherwise blurry image.
It naturally compensates
for an approximate focusing, but it makes the observation much
less comfortable and leads to faster eye fatigue. The back and
forth movement of the eyepiece holder's dial deceives the eye
and makes it easy to find the right focus.
Please note that the eyepiece holder is equipped with a clamp screw
which must be tightened just enough to allow smooth focusing.
9
10
focus knob
ocular lens
clamping
eyepiece holder
clamping
eyepiece
star diagonal
g
C
