THE FOCUSER
Stellarvue focusers are oversized and designed to be accurate,
very smooth and stable. They can lift more weight than is neces-
sary, so heavier accessories may be used.
The focuser may be rotated 360 degrees so the user can put the
focuser knobs in the most convenient position. To rotate the
focuser loosen the rotator lock thumb screw slightly and rotate
the focuser. Once it is positioned where you want it, lock the
thumb screw.
The coarse focus knobs on either side of the focuser move the
drawtube in and out smoothly to attain focus. On one side there
is a separate fine focus knob. This knob rotates 7 - 10 times with
every single rotation of the coarse focus knobs. This permits ex-
tremely minute adjustments necessary to focus precisely at
higher powers.
Focus Knobs
:
If there is a little play in the focusing knobs, use the supplied Allen
wrench and tighten the set screw in the knob with play. This will fix the problem.
If the focus knobs make a noise when they are turned, they may be rubbing on
one another or against the side housing. To eliminate this, loosen the knobs with
the Allen wrench and pull them slightly apart from each other and the side hous-
ing. This will eliminate any rubbing.
Adjusting the Focuser: There is a tension control thumb screw
under the focuser. Use this to adjust tension for your various ac-
cessories. Place your heaviest diagonal and eyepiece (or camera)
in the focuser. If there is sideways movement when you focus or if
the focuser drawtube slips, increase the tension by slightly tight-
ening the Tension Control. Do not over-tighten, or the focuser will
be harder to adjust.
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Upper Tension Control: There is an upper
tension control that applies additional pres-
sure to the drawtube and makes it more
stable especially when imaging with a
heavy camera. Use a screwdriver to adjust
this tension control if needed to stabilize the
drawtube. Again, do not over-tighten and
use this adjustment only when necessary.
