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TELESCOPE FEATURES
6
1 2
9
5
11
10
6
(on left
fork arm)
16
4
19
13
15
7
3
Features of the ETX-90AT, ETX-105AT,
and ETX-125AT are identical,with the
exception of the size of optical tube
and the type of viewfinder.
Fig. 2 (Inset): Computer Control Panel. (A) On/Off switch; (B)
Auxiliary ports; (C) Handbox port; (D) 12v connector; (E)
Power indicator light.
E
A
B
B C D
8
12
14
18
17
1 Eyepiece
2
Viewfinder
3 Holder Thumbscrew
4 90° Eyepiece Holder
5 Optical Tube
6 Vertical Lock
7 Fork Arms
8 Focus Knob
9 Horizontal Lock
10 Computer Control Panel
A. ON/OFF Switch
B. Auxiliary Ports (2)
C. Handbox Port
D. 12v
E. LED
11 Base Housing
12 Battery Compartment
(bottom of base)
13 Right Ascension (R.A.)/
Horizontal Setting Circle
14 Flip-Mirror Control Knobs
15 Photo Port
16 Declination (Dec.)/Vertical
Setting Circle
17 Viewfinder Alignment Screws
18 Viewfinder Alignment Bracket
19 Dust Cap
Fig. 1: The ETX-90AT Telescope.