National Geographic NG90EQ Instructions And Owner's Manual

13, 13 CARE AND CLEANING OF OPTICS Optical components of a telescope get dirty over time. Dirt or dust on a lens should be removed with the utmost care. A considerable amount of dirt or dust would have to accumulate on the optical surface before your view would be compromised. 1) Ke…

8, 8 Complete the following settings in daylight: 1) Insert the 25-mm eyepiece into the eyepiece holder. Look at an easily recognizable, stationary object that is at least 500 feet away. Slightly loosen all locking knobs and move the telescope until the object is in the center of the…

9, 9 You can also adjust the declination by raising or lowering the angle of the main optical unit until the arrow on the degree scale located on the side of the equatorial mount points toward the north latitude of your observing location. If you do not know your viewing position’s north latit…

15, National Geographic NG90EQ 15 2) Why can’t I see anything through my telescope? If you see only gray or black when looking through your telescope, even after searching for an object to view, it is very likely that you are using an eyepiece that is too powerful. To solve this problem always start with the lowest po…

7, 7 10) Remove the plastic dust cap from the upper eyepiece port and insert the 25-mm eyepiece into the eyepiece holder. Tighten the small set screw to hold the eyepiece securely in place. (See Fig. 15). (Fig. 15) 11) Remove the plastic dust cap from the rear eyep…