Meade LX-90 Instruction Manual page 40

#62 T-Adapter: The T-Adapter is the basic means of prime-focus photography through all
Meade Schmidt-Cassegrain models. Thread the T-Adapter on to the rear cell of your telescope,
followed by a T-Mount for your 35mm camera, and the camera body is rigidly coupled to the
telescope.
Variable Tele-Extender: For eyepiece-projection photography of the Moon and the planets, a
Tele-Extender is required. The variable Tele-Extender threads onto the telescope's eyepiece-
holder, into which is inserted an eyepiece of typically about 26mm focal length; the 35mm cam-
era body couples to the tele-extender by means of a T-Mount. The Meade Variable Tele-
Extender permits a range of projection images.
Fig. 19: #62 T-Adapter.
Off-Axis Guider: The Off-Axis Guider provides a means during long-exposure astrophoto-
graphy for the photographer to monitor the tracking of the telescope to assure that the tele-
scope remains precisely positioned on the object being photographed. Like the T-Adapter, the
Off-Axis Guider couples the camera body to the telescope but it also causes a small amount of
the guidestar's incoming light to be diverted at a right angle, where the star's position can be
examined for tracking errors with an illuminated reticle eyepiece; position corrections can then
be effected using Autostar.
Electric Focusers: Meade electric focusers are uniquely designed to yield smooth, precise
microfocusing of the image, without disabling the manual focus knob, which may be used for
rapid coarse focusing. Two focuser models are available: the #1205, which includes pushbut-
ton hand controller with self-contained (user-provided) battery, and the #1206, which plugs
directly into the Accessory Port Module (see previous page), with actuation from the hand con-
Fig. 20: Off-Axis Guider.
troller.
Piggyback Brackets: Piggyback photography is one of the most popular and easiest ways to
get started in astrophotography. Attach your 35mm camera, with its own 35mm-to-250mm lens,
atop your LX90 in equatorial mode, and guiding the camera through the main telescope, wide-
field photos of the Milky Way of remarkable detail and clarity can be taken.
Dew Shield: In moist climates, water particles suspended in the atmosphere may condense on
the front surface of the telescope's correcting plate. This dew formation may be inhibited to a
significant extent by the addition of a dew shield, essentially an extension tube attaching to the
front-cell of the telescope.
#541 AC Adapter: The optional #541 AC Adapter permits powering of the telescope via a stan-
dard household (115v.AC) electrical outlet.
#607 Power Cord: Powering the LX90 telescope by means of an automobile cigarette lighter
plug requires the #607 Power Cord. With this 25 ft. cord, the LX90 may be powered for a full
night's observing without risk of car-battery drain.
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