Celestron AstroMaster 90 EQ User Manual

ENGLISH | 1
Your AstroMaster 90/127EQ MAK includes: optical tube w/
StarPointer finderscope, tripod with center support bracket,
equatorial mount, two eyepieces, two counterweights,
counterweight bar, two slow motion cables, erect image
diagonal, accessory tray, and CR2032 battery.
All three legs should be the same length to provide a level
platform for the telescope.
Locate the equatorial mount and place the base of the mount
through the hole in the center of the tripod mounting platform.
To set up the tripod, spread the legs outward until they are
fully extended. Extend the center portion of each of the
three tripod legs down 6-12”.
To attach the accessory tray, line up notches and turn clockwise
until tray tabs lock into place with the tripod brackets.
From underneath the tripod mounting platform, thread the
mounting nut into the threaded hole on the bottom of the
equatorial mount.
Use the three tightening screws located at the bottom of
each leg to secure the extended legs in place.
Properly assembled, the accessory tray should appear as
pictured above.
Thread the latitude adjustment screw into the equatorial
mount until the screw is touching the inside of the mount.
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QUICK SET-UP GUIDE
ENGLISH
#22058
TELESCOPE
90 EQ
MAKSUTOV-CASSEGRAIN
#22059
TELESCOPE
127 EQ
MAKSUTOV-CASSEGRAIN

Celestron AstroMaster 90 EQ Specifications

General

Optical Design	Refractor
Focal Ratio	f/11
Mount Type	Equatorial
Finderscope	StarPointer
Eyepieces Included	20 mm (50x), 10 mm (100x)
Highest Useful Magnification	213x
Tripod	Steel
Aperture	90 mm
Eyepiece Barrel Size	1.25"
Focal Length	1000 mm (39")

Summary

Quick Set-Up Guide

Tripod Leg Setup

Guides on extending, securing tripod legs, and attaching the accessory tray for a stable base.

Equatorial Mount Installation

Instructions for attaching the equatorial mount to the tripod and setting the latitude adjustment.

Included Components

Lists the optical tube, finderscope, tripod, eyepieces, counterweights, and accessories included.

Telescope Assembly and Initial Setup

Attaching Counterweight and Cables

Attaching the counterweight bar, slow motion cables to the equatorial mount axes.

Mounting Telescope Tube

Securing the telescope tube onto the equatorial mount using dovetail clamps.

Inserting Diagonal and Eyepiece

Inserting the diagonal into the visual back and then the eyepiece into the diagonal.

Finderscope Battery Check

Checking the finderscope battery by removing a protective plastic tab.

Aligning the Finderscope

Choose and Center Target

Select a distant object and center it in the main telescope's eyepiece.

Align Red Dot

Use adjustment knobs to align the finderscope's red dot with the centered object.

First Observation: Viewing the Moon

Pointing and Initial Focusing

Point the telescope at the Moon and use the finderscope to locate it.

Adjusting Magnification

Switch to a higher power eyepiece for a closer view of lunar details.

Celestial Object Discovery

Learn to view other celestial objects and use the SkyPortal app.