Meade ETX-90EC, Инструкция по эксплуатации

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OPTIONAL ACCESSORIES
A wide assortment of professional Meade accessories is available for the ETX-
90EC. 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-
series telescopes are available at more than
2000 dealer locations in the U.S.
and Canada and through Meade international distributors worldwide.
Eyepieces: Meade Super Plössl (SP), Super Wide Angle (SWA), and Ultra Wide
Angle (UWA) Eyepieces in the standard American-size (1.25") barrel diameter (Fig.
23) permit a wide range of magnifying powers with the ETX-90EC. Powers obtain-
ed with each available eyepiece are shown in the following table:
Eyepiece
Magnifying
Power
with ETX-
90EC
With
#126
2X
Barlow
Lens
SP
6.4mm
195X 390X **
SP
9.7mm
129X 258X
SP
12.4mm
101X 202X
SP 15mm 83X 166X
SP 20mm 63X 126X
SP 26mm
*
48X 96X
SP 32mm 39X 78X
SP 40mm 31X 62X
SWA
13.8mm
91X 182X
SWA
18mm
69X 138X
SWA
24.5mm
51X 102X
UWA
4.7mm
266X N/A
UWA
6.7mm
187X 374X **
* Included as standard
equipment with the ETX-90EC
telescope.
** Use these eyepieces only
under extremely steady
atmospheric conditions.
Fig. 23: Optional eyepieces yield
higher and lower magnifying
powers with the telescope.
Meade Super Plössl and Super Wide Angle Eyepieces are ideal for general-purpose
astronomical or terrestrial observing. The typical ETX-90EC user may wish to add two or
three of these eyepieces to his or her telescope. An introductory selection might include
the SP 9.7mm and SP 15mm eyepieces, while the more advanced observer might select
the SP 9.7mm, SP 12.4mm, and SWA 18mm. Meade Super Wide Angle Eyepieces yield
extremely wide fields of view, perfect for the examination of star fields, diffuse nebulae, or
for terrestrial applications. Under steady seeing conditions Meade UWA 4.7mm and
6.7mm eyepieces present the widest fields of view obtainable at high powers and are
excellent eyepieces for viewing the Moon and planets.
WARNING! Never use the
Meade ETX-90EC Astro
Telescope to look at the Sun!
Looking at or near the Sun
will
cause instant and irreversible damage to
your eye. Eye damage is often painless,
so there is no warning to the observer
that damage has occurred until it is too
late. Do not point the telescope or its
viewfinder at or near the Sun. Do not
look through the telescope or its
viewfinder as it is moving. Children
should always have adult supervision
while observing.