2
Introduction
Congratulations on your purchase of the Orion StarBlast tele-
scope! Take time to read through this manual before embark-
ing on your journey through the heavens.
Please read the separate AutoTracker Mount Manual (IN 489)
for all information relating to the mount and its accessories.
Your StarBlast telescope is designed to give you years of fun
and exciting astronomical observations. However, there are
a few things to consider before using your telescope that will
ensure your safety and protect your equipment.
Parts List
Optical Tube Assembly
EZ Finder II Reflex Sight (with bracket)
Super 25mm Eyepiece
Super 10mm Eyepiece
Focuser Dust Cap
Telescope Dust Cap
Quick-Collimation Cap
Hex Key
The Eyepieces
The eyepiece, or ocular, is the optical element that magnifies
the image focused by the telescope. The eyepiece fits direct-
ly into the focuser. The 1.25" designation refers to the barrel
diameter of the eyepieces.
To install one of the included eyepieces:
1. Loosen the two thumbscrews on the eyepiece adapter
at the end of the focuser drawtube and remove the
protective dust cap.
2. Slide the barrel of the eyepiece into the focuser.
3. Tighten the thumbscrews to hold the eyepiece in place.
To remove the eyepiece, loosen the thumbscrews on the eye-
piece adapter and slide the eyepiece out.
Eyepieces are commonly referred to by their focal length and
barrel diameter. The focal length of each eyepiece is typically
printed on the eyepiece body. For example this telescope ships
with two 1.25" diameter eyepieces; a 25mm and a 10mm. The
longer the focal length (i.e., the larger the number), the lower
the eyepiece power or magnification; and the shorter the focal
length (i.e., the smaller the number), the higher the magnifi-
cation. Generally, you will use low-to-moderate power when
viewing. For more information on how to determine power, see
the section “Calculating Magnification.”
Focusing
Using the lower power eyepiece (25mm) inserted and secured
with the thumbscrews, aim the optical tube so the front 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
until the object comes into sharp focus. A good method to
ensure you’ve hit the exact focus point is go a little bit beyond
WARNING:
• NeverlookdirectlyattheSunwiththenaked
eyeorwithatelescope–unlessyouhaveaproper
solarfilterinstalledoverthefrontofthetelescope!
Otherwise,permanent,irreversibleeyedamage
mayresult.
• Neveruseyourtelescopetoprojectanimageof
theSunontoanysurface.Internalheatbuild-up
candamagethetelescopeandanyaccessories
attachedtoit.
• NeveruseaneyepiecesolarfilteroraHerschel
wedge.Internalheatbuild-upinsidethetelescope
cancausethesedevicestocrackorbreak,
allowingunfilteredsunlighttopassthroughto
theeye.
• Neverleavethetelescopeunsupervised,either
whenchildrenarepresentoradultswhomaynot
befamiliarwiththecorrectoperatingprocedures
ofyourtelescope.
Figure 1. In the box: Parts of the StarBlast 114mm.
Figure 2. Insert the EZ Finder II in its dovetail base in the
orientation shown and secure it with the thumbscrew.
Front
(open) end
of optical
tube
Dovetail
base
Thumbscrew
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