Barska 40070 Mode D'emploi page 11

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 finder scope with reticule for orienta-
tion. It 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 300m. 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 finder scope. lf the object seen through the telescope is not
visible, then release the adjusting screws and move the finder scope until the object can
be seen. Now retighten the adjusting screw while ensuring that the object remains visi-
ble in the centre or the finder scope. To simplify this procedure use the adjusting screws
to adjust the object in the centre. The finder scope 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 finder scope.
PAN HEAD MOUNT 60050 & 40070 & 40080
The telescope is fitted with a pan head mount. The movement of the telescope is done
by movements whilst turning the main bolt.
AZIMUTH MOUNT 70060 & 80060 & 70076
The telescope is fitted with an Altitude - Azimuth mount. "Altitude" refers to the up and
down or vertical movement of the telescope, whilst " Azimuth" refers to the sideways or
horizontal movement.
EQUATORIAL MOUNT 90060 & 900114
The Equatorial mount, in conjunction with the micro adjustable Altitude control, and the
Azimuth Lock enables you to observe the entire night sky, or any celestial body, without
having to move the tripod.
WHICH MAGNIFICATION? SELECTING THE CORRRECT EYEPIECE
Magnification defines the power of a telescope to enlarge an image or to 'pull it in' closer for
viewing.
Example :
700mm focal length
12.5mm focal length of eyepiece
The required magnification depends upon the object being observed. The following general
guideline is recommended for this purpose: Ideal viewing conditions are obtained if the
magnification is not more than 15x - 20x the diameter of the objective lens, i.e. an optimal
ADJUSTING THE FINDERSCOPE
12
= 56 x magnification