Orion 90 - User Manual

IN 114 Rev. C 0899
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INSTRUCTION MANUAL
Orion
®
ShortTube
™
90
90mm Rich-Field Refracting Telescope
#9069
W elcome to a new world of adventure! Your Orion ShortTube 90 is a fine-quality instrument designed for both daytime ter-
restrial 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.
Parts List
Qty. Description
1 Optical tube assembly
1 26mm (19x) Plössl eyepiece (1.25")
1 90° star diagonal
1 6x30 finder scope
1 Objective lens cap
Getting Started
The ShortTube 90 comes nearly fully assembled from the factory. The
telescope’s optics have been installed and collimated, so you should
not have to make any adjustments to them. Open the box and inspect
the contents to make sure all of the parts listed above are present.
WARNING: Never look at the sun with your telescope
(or even with just your eyes) without a professionally made
solar filter. Permanent eye damage or blindness could
result.Young children should use this telescope only with
adult supervision.
Avoid using the type of solar filter that screws into an eye-
piece. They are susceptible to cracking under the intense
heat that builds up near the focus point, and could cause
severe retinal damage. Use only the type of solar filter that
covers the front of the telescope. Be sure also to cover the
front of the finder scope with aluminum foil or another
opaque material to prevent physical damage to the internal
components of the scope itself as well as to your eyes.
Finder scope bracket
1/4"-20 mounting block
Dew/glare shield
Finder scope
Finder scope alignment screws
Focus lock setscrew
Eyepiece
Focus wheel
90° star diagonal
The ShortTube 90mm Refractor

Orion 90 Specifications

General

Brand	Orion
Model	90
Category	Telescope
Language	English

Summary

Introduction and Initial Setup

Parts List

Lists all components included with the telescope for user verification.

Getting Started

Provides initial instructions for setting up and using the telescope.

Telescope Installation and Usage

Installing Accessories

Guidance on attaching the finder scope, diagonal, and eyepiece.

Mounting the Telescope

Instructions for attaching the telescope to a tripod or mount.

Focusing

Details on how to achieve a sharp image using the focuser.

Aligning the Finder Scope

Steps to accurately align the finder scope with the main telescope.

Viewing Modes and Techniques

Terrestrial Viewing

Tips for observing objects on Earth, including diagonal recommendations.

Astronomical Viewing

Guidance for observing celestial objects and selecting viewing sites.

Calculating Magnification

Formula and advice for determining telescope magnification power.

Photography

Instructions for using the telescope for photography with a camera.

Maintenance, Specifications, and Support

Care & Maintenance

Recommendations for cleaning, storing, and maintaining the telescope.

Specifications

Technical details and measurements of the telescope.

Suggested Accessories

List of recommended optional accessories for enhanced use.

Warranty Information

Details on the one-year limited warranty coverage and service.