Bresser Taurus NG Mode D'emploi page 25

2. Technical Data
Design: achromatic refracting telescope with 2 lenses
Focal length: 900 mm
Lens diameter: 90 mm
Magnification: 45 - 135x (depending on eyepiece).
Viewfinder: 6x30
Mount: equatorial (EQ-3) on a vertically adjustable
aluminium tripod.
3. Troubleshooting:
Mistakes:
No picture
Blurred picture
No focus possible
Bad picture
Viewing object visible
in the finder, but not
through the telescope
Heaviness in the flexible
handles on the axis
over the shaft
Despite using star
diagonal prism
the picture is
"crooked"
Help:
Remove dust protection cap and
sunbathe-shield from the objective
opening.
Adjust focus using focus ring
Wait for temperature to balance out
Never observe through a glass
surface
Adjust finder (See Part I:
6. Construction)
Telescope not balanced
The star diagonal prism
should be vertical in
the eyepiece connection
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