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APPENDIX H:
DE-ROTATOR AND
MICROFOCUSER ASSEMBLY
For LX200-ACF Telescopes Equiped with a Zero Image-Shift Microfocuser
When using a de-rotator, it is important to attach the microfocuser so that it is backed
off slightly from the de-rotator. If the microfocuser is flush against the de-rotator,
the assembly will not work properly. This is true also with other accessories that
may attach up flush against the de-rotator housing. The diagonal mirror (if used
without the microfocuser) may be attached tightly as it does not rub up against the
de-rotator housing.
To attach the microfocuser to the de-rotator:
Refer to Fig. 8, page 14, for an exploded view of the microfocuser assembly. Perform
this assembly on a flat surface (such as a desk or a table) before you attach the de-
rotator and microfocuser to the telescope.
1. With the de-rotator on a flat surface, thread on the adapter ring (Fig. 8, B) until it
just touches the housing; then back off the adapter ring (
i.e.
, turn it counter-
clockwise) one full revolution as shown in Fig. 60.
2. Place the microfocuser over the ring with the “hump” of the microfocuser in the
12:00 position as shown in Fig. 61.
3. Using the provided hex key, tighten to a firm feel one of the three microfocuser hex
screws (Fig. 8, K) up against the adapter ring as shown in Fig. 62. Take care not
to tighten or loosen the adapter ring as you position and tighten the microfocuser
in place.
4. Tighten to a firm feel the other two microfocuser hex screws.
5. Attach the de-rotator to the rear cell of the telescope.
Fig. 60: Back off the adapter ring one
full revolution.
Fig. 61: Place the microfocuser over
the adapter ring. Notice the
orientation of the microfocuser.
Fig. 62: Tighten the three
microfocuser hex screws to a firm
feel.
12:00 position
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