Part III: Basic Operations
7
Focusing
1. Make sure the locking screw
[
Fig 5.1
]
is loose.
2. Slowly turn the focus knobs
[
Fig 5.2
]
one way or the other,
until the image in the eyepiece is nearly sharp.
3. To finely focus the image turn the 1:10 knob one way or the
other until the image is perfectly sharp
[
Fig 5.3
]
.
4. Tighten the locking screw
[
Fig 5.1
]
if a heavy load is
attached.
The image usually has to be finely refocused over time, due to
small variations caused by temperature changes. This often
happens when the telescope has not yet reached outside
temperature.
Refocusing is almost always necessary when you change an
eyepiece or accessory.
Fig. 5