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Fig. 31: #774 Hard Carrying Case.
#607 DC Power Cord: To power the ETX-90EC from an automobile cigarette
lighter plug, the #607 DC Power Cord (Fig. 32) is required. Supplied with 25 ft.
cord.
#541 AC Adapter: (not shown) The #541 AC Adapter permits powering of the ETX-90EC via a standard household
(115vAC) electrical outlet. Supplied with 25 foot cord.
#1244 Electric Focuser: The #1244 Focuser (Fig. 33) replaces the manual
focuser knob of the ETX-90EC and permits smooth, precise electric focusing of
the image through a remote handbox supplied with the focuser. Alternately, on
the ETX-90EC, the #1244 Focuser may be plugged into the telescope's
computer control panel and operated through either the Electronic Controller or
the optional #497 ETX Autostar Computer Controller.
Fig. 34: (1) #905 Variable Polarizing Filter;
(2) Eyepiece.
#774 Hard Carrying Case: For situations that require ruggedness and
portability, the #774 Hard Carrying Case (Fig. 31) provides a secure
environment for the ETX-90EC. The fitted foam interior protects the telescope
while providing ample room for additional eyepieces, a table tripod, the
Electronic Controller, ETX Autostar, and much more.
#905 Variable Polarizing Filter: For glare reduction in observing the Moon the
#905 Variable Polarizer (Fig. 34) includes two Polarizer filters mounted in a
specially-machined cell. The #905 permits variable settings of light transmission
between 5% and 25%, to account for varying lunar surface brightness according
to the phase of the Moon. Accepts 1.25" barrel-diameter eye-pieces of any focal
length.
Fig. 32: #607 DC Power Cord.
Fig. 33: #1244 Electric Focuser.
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