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 screws while ensuring that the
object remains visible in the center of the finderscope. To simplify this procedure,
use the adjusting screws to adjust the object in the center. 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.
HOW TO ADJUST THE FOCUS
Although it appears easy to adjust the focus, it is rather laborious in practice until onegets used to it. Focus on any distant image in the daytime and repeat this practice to develop skill in it.
1 . Adjust the focus by moving the Focusing Tube (B) back and forth. This may be done by turning the Focus Knob (A).
2. Since stars are always moving, focus on a neon sign or lamp over 1 ,OOO meters
away. When the image is focused roughly, adjust the focus by moving the Focusing Tube (B) back and fiorth slightly until the image is made clear. Then,
without shifting the tube, point it to catch a star, and the focus will normally be found to be correct.
3. First adjust the focus with an eyepiece of lower magnification and then change it to another one having the required magnification.
4. Whenever the eyepiece is changed, readjust the focus by moving the Focusing Tube (B) slightly.
BEFORE OBSERVATION
Try to focus the telescope . It is advisable to start by using a low powered eyepiece on a distant terrestrial object. The image given by an. astronomical telescope will appear erect but as a mirrored image. Remove the diagonal and insert the erecting eyepiece to correct the mirrored image.
SPECIAL NOTES
Your telescope is a precision optical instrument, that is like any other optical instrument, it should be kept away from dust and moisture which are bad for all optical systems. When lenses get dirty, blow off the dust particles before cleaning the lenses, then clean the lens gently with moistened lens tissue. The lenses should not be taken apart, and the surface of the lenses should be kept free of finger smudges.
After the observation, keep the telescope in a dry dust free place. Avoid sudden temperature fluctuations as the moisture ìn the air will condense on the objective lens. Should this happen, then place the objective lens not too close to a source of heat and allow the moisture to evaporate slowly. With this care, your telescope willbecome a friend for life.
T5761-00-8101