Bresser Arcturus 60/700 Gebrauchsanleitung Seite 8

GB
Eyepiece chart and theoretical power limits:
Eyepiece Power
20 mm 35x
12.5 mm 56x
4 mm 175x
ADJUSTING THE FINDERSCOPE
Since the telescope has a limited field of view, it can be quite difficult to locate a given
star or planet. For this reason the telescope is fitted with a finderscope with reticule for
orientation. lt is advisable to complete the following settings in daylight:
1. Insert the eyepiece with the lowest magnification in the zenith mirror or zenith prism.
Look at a stationary, easily recognizable object that is not further away than
300 m.Turn the telescope with the horizontal axle, and move the vertical axle until the
object is in the middle of the field of view, and then focus the image. Tighten the
adjusting screw on the mount so that the telescope remains in this position (the higher
the object is above the horizon, the easier it is to locate).
2. Now look through the finderscope. If the object seen through the telescope is not
visible, then release the adjusting screws and move the finderscope until the object
can be seen. Now retighten the adjusting screw while ensuring that the object remains
visible in the centre of the finderscope. To simplify this procedure use the adjusting
screws to adjust the object in the centre. The finderscope will move in the direction of
the screw in which it is being turned. All screws can be finally tightened as soon as the
setting with the eyepiece coincides with that of the finderscope.
ALTITUDE-AZIMUTH MOUNT
The telescope is fitted with an Altitude-Azimuth mount. „Altitude" refers to the up and
down or vertical movement of the telescope, while „Azimuth" refers to the sideways or
horizontal movement. The Altitude-Azimuth mount, in conjunction with the
microadjustable Altitude control (1), and the Azimuth Lock (14) enables you to observe the
entire night sky, or any celestial body, without having to move the tripod.
WHICH MAGNIFICATION? SELECTING THE CORRECT EYEPIECE
Magnification defines the power of a telescope to enlarge an image or to ‚pull it in' closer
for viewing.
700 mm (telescope focal length)
Example:
12,5 mm (eyepiece focal length)
The required magnification depends upon the object being observed. The following
general guideline is recommended for this purpose. ldeal viewing conditions are obtained
Power with 1.5x erecting eyepiece
52,5x
84x
262x
= 56x magnification
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