Orion STARBLAST 9814 - Manual (Page 5)

5
Focusing the Telescope
With the 17mm Kellner eyepiece (1) inserted into the
focuser (4) and secured with the thumbscrews, aim the opti-
cal tube (3) so the front (open) end is pointing in the general
direction of an object at least 1/4-mile away. With your fingers,
slowly rotate one of the focus wheels (15) until the object
comes into sharp focus. Go a little bit beyond sharp focus until
the image starts to blur again, then reverse the rotation of the
knob, just to make sure you’ve hit the exact focus point.
Operating the EZ Finder II reflex finder
The EZ Finder II reflex finder (2) (Figure 6) works by project-
ing a tiny red dot onto a lens mounted in the front of the unit.
When you look through the EZ Finder II, the red dot will
appear to float in space. The red dot is produced by a light-
emitting diode (LED), not a laser beam, near the rear of the
sight. A replaceable 3-volt lithium battery provides the power
for the diode.
Do You Wear Eyeglasses?
If you wear eyeglasses, you may be able to keep them on
while you observe. In order to do this, your eyepiece must
have enough “eye relief” to allow you to see the entire field
of view with glasses on. You can try looking through the
eyepiece first with your glasses on and then with them off,
to see if the glasses restrict the view to only a portion of
the full field. If the glasses do restrict the field of view, you
may be able to observe with your glasses off by just refo-
cusing the telescope to your unaided vision.
If your eyes are astigmatic, images will probably appear
best with glasses on. This is because a telescope’s
focuser can accommodate for nearsightedness or far-
sightedness, but not astigmatism. If you have to wear your
glasses while observing
and cannot see the
entire field of view, you
may want to purchase
additional eyepieces
that have longer eye
relief.
Short
eye relief
restricts
the field
of view
for
eyeglass
wearers.
Long eye
relief allows
full field
of view to
be seen with
or without
eyeglasses.
Figure 4. The StarBlast has two axes of motion: altitude
(up/down) and azimuth (left/right).
Altitude
Azimuth
Figure 5. Try grasping the telescope as shown for easiest pointing.
One hand moves the telescope from the front of the tube while the
other hand remains on the handle to keep the telescope steady.
Figure 6. The EZ Finder II reflex sight.
Power Knob
Azimuth
adjustment
Knob
Battery
casing
Mounting bracket
Altitude
adjustment
Knob