Orion Express 80mm refractor telescope Instruction Manual

INSTRUCTION MANUAL

Orion® Express™ 80mm

Refractor Telescope

#9780 Optical Tube Assembly

Providing Exceptional Consumer Optical Products Since 1975

Customer Support (800)-676-1343
E-mail: [e-mail]

Corporate Offices (831)‑763‑7000

P.O. Box 1815, Santa Cruz, CA 95061

IN 259 Rev. A 6/05

Objective lens

1.25" Eyepiece adapter

Focuser drawtube

Focuser rotation thumbscrew

Lens shade

Focus wheel

Mounting block

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Figure 1. The Express 80mm optical tube assembly.

Welcome to a new world of adventure! Your Orion Express 80mm is a fine-quality instrument designed
for both daytime terrestrial viewing and nighttime stargazing. Compact, portable, and easy to use, this
versatile scope will provide many hours of enjoyment for the whole family.

These instructions will help you set up and properly use and care for your telescope. Please read them
over thoroughly before getting started.

and remove the 1.25" eyepiece adapter. Insert a 2" diagonal
into the drawtube and secure it in place with the drawtube’s

Parts List

Qty. Description

1 Optical tube assembly

1 1.25" Eyepiece adapter (comes installed in focuser
drawtube)

1 Carry case

1 Objective lens cover

thumbscrew. Insert a 2" eyepiece (or 1.25" eyepiece, using
the 1.25" eyepiece adapter) into the diagonal and secure it in
place with the thumbscrew(s) on the diagonal. (Always loosen
thumbscrews before rotating or removing the diagonal or an
eyepiece.) To use a 1.25" diagonal and eyepieces, secure the

1.25" eyepiece adapter in the focuser with the thumbscrew
on the drawtube. Insert a 1.25" diagonal into the adapter,
and secure the diagonal by tightening the thumbscrew on the

1.25" eyepiece adapter. Insert your 1.25" eyepiece into the
diagonal and secure it in place with the thumbscrew(s) on the
diagonal.

Getting Started

The Express 80mm comes fully assembled from the factory.
The telescope’s optics have been installed and aligned, so
you should not have to make any adjustments to them. Open
the box and inspect the contents to make sure all of the items
in the parts list are present.

Please keep the original shipping box. In the unlikely event
you should need to ship the telescope back to Orion for war­ranty repair service, you should use the original packaging.

The Express 80mm is a very versatile instrument, designed
for terrestrial and astronomical use both visually and
photographically. To customize the telescope for your spe­cific usage, you will need to add specific optional accessories
including eyepieces, diagonal, finder scope, and a tripod or
mount (Figure 2).

Eyepiece

Diagonal

Mounting the Telescope on a Tripod or Telescope
Mount

The Express 80mm can be mounted on any standard camera
tripod that has a 1/4"-20 stud. The stud threads into one of
the two threaded holes in the mounting block on the under­side of the telescope’s tube. Choose the hole whose position
provides the best balance for your particular configuration of
telescope and accessories. Alternatively, the telescope can
be attached to an equatorial mount equipped with a 1/4"-20
adapter. An equatorial mount is desirable for astronomical
viewing because it allows easy manual tracking of celestial
objects as the Earth rotates. Also, the setting circles on the
mount enable you to locate objects by their celestial coordi­nates (right ascension and declination), which can be found in
many observing books and star atlases.

Installing a Diagonal and Eyepiece

The Express 80mm can be used with 2" or 1.25" eyepiec­es and accessories. To use a 2" diagonal and eyepieces,
loosen the thumbscrew on the end of the focuser drawtube

Equatorial
mount

Figure 2. The Express 80mm with optional accessories.

WARNING: Never look directly at the Sun through

your telescope—even for an instant—without a
professionally made solar filter that completely
covers the front of the instrument, or permanent
eye damage could result. Young children should use
this telescope only with adult supervision.

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