Meade Instruments ETX 90AT - Manual (Page 43)

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OPTIONAL ACCESSORIES
A wide assortment of professional Meade accessories are available for the for ETX
telescopes. Meade accessories greatly extend many important applications to the
telescope, from low-power, wide-field terrestrial viewing to high-power lunar and
planetary observing. The premium quality of these accessories is well-suited to the
quality of the instrument itself.
Meade telescopes and accessories, including optional accessories for ETX
telescopes, are available at more than 3,000 dealer locations in the U.S. and Canada
and through Meade international distributors worldwide. Once you have identified the
accessories you wish to order, contact your local Meade authorized dealer. To find a
dealer near you call
(949) 451-1450 or visit the Meade website at www.meade.com.
Autostar Suite with Meade LPI (Lunar Planetary Imager) and Planetarium
software (Fig. 33) turns your Meade ETX telescope, Autostar and PC into even more
powerful and easy-to-use astronomical instruments. Includes cable for connecting
Autostar to your PC. See page 42 for more details.
#505 Cable Connector Kit: With Meade AstroFinder
software (Fig. 33) loaded into your PC, Autostar-equipped ETX–90AT, ETX-105AT,
and ETX-125AT telescopes may be remotely controlled from the PC display. The
#505 Cable Connector Set, permitting connection of ETX, Autostar and PC, is includ-
ed with each AstroFinder package.
Eyepieces: For higher and lower magnifications, Meade Super Plössl (SP) and
Super Wide Angle (SWA) eyepieces (
Fig. 34), as well as the Series 4000 8mm to
24mm Zoom eyepiece, yield high-resolution imaging with all ETX telescope models.
A useful selection includes the SP 9.7mm, SP 12.4mm and SWA 18mm. Under good
seeing conditions, Meade Ultra Wide Angle 4.7mm and 6.7mm eyepieces present the
widest obtainable fields of view at high powers and are well suited for observing the
Moon and planets. Powers obtained with each eyepiece are shown in the following
table.
#126 2x Barlow Lens: An amplifying lens, the multi-coated #126 2x Barlow (Fig. 35)
doubles the power of all eyepieces with which it is used. Insert the #126 into the
telescope’s eyepiece holder first, followed by an eyepiece. Example: By itself, the
26mm eyepiece yields a power of 73X with the ETX-125AT; when used with the #126
2x Barlow Lens, this eyepiece yields 146X.
#825 8 x 25mm Right-Angle Viewfinder: Included as standard-equipment on
ETX-105AT and ETX-125AT models, the 8 x 25mm Right-Angle Viewfinder (Fig. 36)
permits a comfortable 90° viewing position with 90mm ETX models as well. The #825
fits into the same bracket as the 8x21mm viewfinder supplied with ETX-90AT
telescopes. The viewfinder’s wide-angle 7.5° actual field facilitates object location.
Precise focusing of the image is accomplished with a helicoid mechanism.
ETX-90AT ETX-105AT ETX-125AT
Eyepiece Power 2x Barlow Power 2x Barlow Power 2x Barlow
SP 6.4mm 195X 390X 230 459 297X 594X**
SP 9.7mm 129X 258X 152 303 196X 392X
SP 12.4mm 101X 202X 119 237 153X 306X
SP 15mm 83X 166X 98 196 127X 253X
SP 20mm 63X 126X 74 147 95X 190X
SP 26mm * 48X 96X 57 113 73X 146X
SP 32mm 39X 78X 46 92 59X 119X
SP 40mm 31X 62X 37 74 48X 96X
SWA 13.8mm 91X 182X 107 213 138X 275X
SWA 18mm 69X 138X 82 163 106X 211X
SWA 24.5mm 51X 102X 60 120 78X 155X
UWA 4.7mm 266X N/A 313 N/A 404X N/A
UWA 6.7mm 187X 374X ** 219 439** 284X 567X**
* Included as standard-equipment with the ETX models.
** Use these eyepieces only under extremely steady atmospheric conditions.
Fig. 34: Optional
Eyepieces yield higher and
lower magnifying powers.
Fig. 33: Autostar Suite with
Lunar Planetary Imager.
Fig. 35: Use the #126 2x
Barlow Lens to double the
magnification of the
eyepiece employed.
Fig. 36: #825 Right-Angle
Viewfinder
.