User Manual

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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