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obtained when an eyepiece is used alone. In the example above a 25mm eyepiece results in
28X magnification with the Meade 60mm DS telescope; when this same eyepiece is used in
conjunction with a 2x Barlow lens, power is doubled to 56X. To use the Barlow, insert it into
the telescope’s focuser/eyepiece-holder (A-17), followed by the diagonal mirror and an eye-
piece. (With Meade 114mm and 127mm DS telescopes, insert the Barlow into the telescope’s
focuser/eyepiece-holder, followed directly by an eyepiece.)
A Note About Power: The most common mistake of the beginning observer is to use pow-
ers which the telescope’s aperture (diameter) and typical atmospheric conditions cannot rea-
sonably support. The result is an image which is fuzzy, ill-defined, and poorly resolved,
through no fault of the telescope. Keep in mind that a smaller, lower-power but brighter and
well-resolved image is far superior to a large, high-power, but dim and poorly-resolved one.
Most commonly, Meade DS telescopes are best used at powers from about 30X (for land
observing and for extended astronomical objects such as diffuse nebulae and star clusters) to
about 150X (for more detailed study of the Moon and planets). Use higher powers only when
the air is steady and when such powers actually increase the level of visible detail.
Collimation of the Telescope’s Optical System: The optical systems of Meade 60mm
through 90mm refractors are collimated (aligned) at the factory and never require adjustment.
Similarly, it is unlikely that the user of a Meade DS 114mm or 127mm reflecting telescope will
need to adjust the factory-aligned optics of either of these models. Users of 114mm and
127mm models should, however, read Appendix 1 to confirm this point.
Maintenance: The objective lenses of Meade DS 60mm through 90mm refracting telescopes
and the primary and secondary mirrors of DS 114mm and 127mm reflecting telescopes should
be cleaned as infrequently as possible. A little dust on a lens or mirror causes negligible loss
of image quality and should not be considered as reason to clean it. If the telescope’s dust
cover (A-3) is replaced after each observing session, cleaning the optics will rarely be
required. When cleaning a lens or mirror does become necessary, use a camel’s hair brush
or compressed air gently to remove dust. The dew shield (A-19) of 60mm through 90mm
refracting telescopes should be removed to access the lens prior to cleaning.
Questions and Repairs: In the U.S.A. questions concerning any Meade DS telescope,
accessories, or optional systems should be directed to: Customer Service Dept., Meade
Instruments Corp., 6001 Oak Canyon, Irvine, California 92618; FAX: (949) 451-1460;
Telephone: (949) 451-1450. Do not return a telescope or telescope part to Meade
Instruments before calling or writing us first; the great majority of repair situations can be
handled without requiring return of the telescope to us. Outside the U.S.A. please contact the
Meade international distributor in your country. A listing of Meade international distributors is
included in the Meade website www.meade.com.
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