Manual

Important Note: In the most discriminating applications, such
as long-distance observing of delicate bird feather-structure,
both ETX models’ internal, optically-flat mirror yields a higher-
resolution image than is possible with any prism, including the
#932. In these special cases users of both ETX models are
advised to observe with the eyepiece in the standard 90°
eyepiece holder (as shown in Fig.1), with the flip-mirror control
in the “up” position. This admonition applies only to situations
requiring extraordinarily high optical resolution and where the
observer’s eye is well trained to observe very fine detail. In
typical terrestrial applications, no image differences between
the two eyepiece locations can generally be noted.
#765 Soft Carry Bag: The Meade soft-padded carry bag (Fig.
31) is well suited to travel with the ETX-90EC. Each carry bag
includes a shoulder strap and permits ready transport of the
complete telescope, including accessories.
Power Adapters and Cords: In addition to their internal battery
packs, ETX-90ECand ETX-125EC telescopes may be powered
from standard 115vAC home electricity with the #541 AC
Adapter. The #541 plugs into any standard home outlet and
includes a 25 ft. cord connecting to the telescope’s control
panel. Input voltage to the telescope is 12vDC. Alternately,
either telescope may be powered in the field from an automobile
cigarette lighter plug by using the #607 Power Cord (Fig. 32), a
25-ft. cord that plugs into the telescope’s control panel and
supplies 12vDC directly from the car battery.
#1244 and #1247 Electric
Focusers:
Meade-engineered for
smooth, rapid focusing with
both ETX models, each
electric focuser (Fig. 33)
includes coarse and micro-
fine speeds. The standard-
equipment hand controller
accepts one (user-supplied)
9-volt battery. On both ETX
models, the focuser plugs
into, and is powered by, the
t e l e s c o p e ’s control panel,
with operation eff e c t e d
through either the Electronic
Controller or the optional
#497 Autostar Computer
Controller: the #1244 f o r
ETX-90EC and the # 1 2 4 7
for ETX-125EC.
Hard Carrying Cases: For secure portability of the ETX-90EC
(#774 Hard Case) or ETX-125EC (#775 Hard Case) in the field,
Meade hard carrying cases (Fig. 34) are fully lined with fitted
foam inserts. They accept the complete telescope and
accessories ( e. g . , additional eyepieces, table tripod, the
Electronic Controller, Autostar, and much more).
#905 Variable Polarizing Filter:
For glare reduction in observing
the Moon, the #905 Va r i a b l e
Polarizer (Fig. 35) includes two
polarizer filters, mounted in a
specially machined cell. T h e
#905 filter permits variable
settings of light transmission,
between 5% and 25%, to
account for varying lunar-surface
brightness according to the
phase of the Moon. The #905
accepts 1.25” barrel-diameter
eyepieces of any focal length.
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OPTIONAL ACCESSORIES
CHAPTER
5
Fig.35: #905 Variable
Polarizing Filter.
Fig.32: #607 Power Cord.
Fig.34: #775 Hard Carrying Case shown with an
ETX-90EC.
Fig.33: #1244 Electric
Focuser.
Fig.31: The #765 Soft Carry Bag for the ETX-90EC.
Fig.30: The #932 45° Erecting Prism shown threaded to the
rear cell of an ETX-90EC. (1) #932 45° Erecting Prism;
(2) Eyepiece; (3) Knurled lock-ring; (4) Flip-mirror control.
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