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thread inward one of the adjustment/lock knobs (1, Fig. 24) while unthreading another of these
knobs. Only make adjustments to two knobs at a time until the secondary mirror appears as in
Fig. 28.
3. Secondary mirror-holder adjustments: If the secondary mirror (1, Fig. 28) is centered in the
focuser drawtube (2, Fig. 28), but the primary mirror is only partially visible in the reflection (3,
Fig. 28), the three “+” (Phillips head) secondary mirror-tilt screws (2, Fig. 24) should be slight-
ly unthreaded to the point where the secondary mirror-holder (3, Fig. 24) can rotate about its
axis parallel to the main tube. Grasp the secondary mirror-holder (avoid touching the mirror sur-
face!) with your hand and rotate it until, looking through the drawtube, you can see the primary
mirror centered as well as possible in the reflection of the secondary mirror. With the rotation
of the secondary mirror-holder at this best-possible position, thread in the three Phillips head
screws (2, Fig. 24) to lock the rotational position. Then, if necessary, make adjustments to
these three Phillips head screws to refine the tilt-angle of the secondary mirror, until the entire
primary mirror can be seen centered within the secondary mirror’s reflection. With the second-
ary mirror thus aligned the image through the drawtube appears as in Fig. 29.
4. Primary mirror adjustments: If the secondary mirror (1, Fig. 29) and the reflection of the pri-
mary mirror (2, Fig. 29) appear centered within the drawtube (3, Fig. 29), but the reflection of
your eye and the reflection of the secondary mirror (4, Fig. 29) appear off-center, then the pri-
mary mirror tilt requires adjusting, using the Phillips head screws of the primary mirror cell (3,
Fig. 25). These primary mirror-tilt screws are located behind the primary mirror, at the lower end
of the main tube. See Fig. 25. Before adjusting the primary mirror-tilt screws, first unscrew by
several turns (use either a hex wrench or pliers) the three hex-head primary mirror lock screws
(2, Fig. 25) which are also located on the rear surface of the primary mirror cell and which alter-
nate around the cell’s circumference with the three Phillips head screws. Then by trial and error
turn the primary mirror Phillips head tilt screws (3, Fig. 25) until you develop a feel for which
way to turn each screw to center the reflection of your eye in the drawtube. (An assistant is
helpful in this operation.) With your eye centered as shown in Fig. 26, turn the three hex head
primary mirror lock screws (2, Fig. 25) to re-lock the tilt-angle of the primary mirror.
The telescope’s optical system is now aligned, or collimated. This collimation should be re-
checked from time to time, with small adjustments (per steps 1, 2, and/or 3, above) effected as
required to keep the optics well-aligned.
Meade Customer Service
If you have a question concerning your DS-2000 Telescope, contact the Meade Instruments
Customer Service Department at:
Telephone: (949) 451-1450
Fax: (949) 451-1460
Customer Service hours are 8:30 AM to 4:30 PM, Pacific Time, Monday through Friday. In the
unlikely event that your DS-2000 telescope requires factory servicing or repairs, write or call
the Meade Customer Service Department first, before returning the telescope to the factory,
giving full particulars as to the nature of the problem, as well as your name, address, and day-
time telephone number. The great majority of servicing issues can be resolved by telephone,
avoiding return of the telescope to the factory.