Celestron FIRSTSCOPE 90EQ User Manual

Use the three tightening screws located at the
bottom of each leg to secure the extended legs
in place.

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 6­8".

Item #31132

Quick Set-up Guide

1

2

3

All three legs should be the same length to
provide a level platform for the telescope.

4

7

Locate the equatorial mount and place the
base of the mount through the hole in the
center of the tripod mounting platform.

5

Properly assembled, the accessory tray should
appear as pictured above.

6

From underneath the tripod mounting platform,
thread the mounting bolt with washer into the
threaded hole on the bottom of the equatorial
mount.

8

Thread the attached latitude adjustment screw
into the equatorial mount until the screw is
touching the inside of the mount and the
mount can no longer pivot up and down.

9

FirstScope 90EQ

Your FirstScope 90 EQ includes: optical tube w/
tube rings attached; tripod with center support
bracket; equatorial mount; two eyepieces;
StarPointer finderscope; 5 lb. counterweight;
counterweight bar; two slow motion cables; star
diagonal; accessory tray; documentation including
an owner’s manual, The Sky™ CD Software.

Item# 21085

Place the accessory tray on top of tripod's
center leg brace. Thread the tray into the
threaded hole in the center of the leg brace.

Questions or Problems with Set-up?

CONTACT:

Celestron Technical Support: 310.803.5955

Quick Set-up Guide [cont]

Locate the counterweight bar and
counterweight. Slide the counterweight half
way down the counterweight bar and tighten
the locking screw to secure in place.

11

Thread the threaded end of the counterweight

bar into the Dec axis of the equatorial mount.

12

13

The other cable attaches to the Declination

axis as pictured above.

14

Place the telescope tube on the equatorial
mount so that the tube is facing forward as
pictured above.

15

Slide the tube onto the mount as shown
above. Secure tube in place by tightening the
bolt as shown above (inset).

16

Locate the StarPointer finderscope. Remove
the knurled nuts on the threaded posts at the
focuser end of the telescope tube.

17 18

Loosen the set screw on the focuser so that it
does not obstruct the inner diameter of the
focuser. Remove the plastic cap covering the
end of the focuser.

19 20

Insert the chrome barrel of the 20mm eyepiece
into the focuser and tighten the set screw.

21

Remove the lens cap from the front of the
telescope. To observe, look through the
eyepiece as shown above.

10

Orient the Star Pointer so that the glass
window is facing towards the front of the tube.
Place Starpointer over the posts on the tube
and tighten it down with the knurled nuts.

Slide the chrome end of the slow motion
control cables onto equatorial mount gear
shaft.

Insert the diagonal into the focuser and tighten
the set screw.

For detailed usage information please consult your owner’s manual.