National Geographic NG90EQ owner manual Finder Scope Alignment

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 eyepiece port and attach the 45º diagonal prism by turning its collar clockwise over the threaded piece on the back of the main optical unit (See Fig. 16 and Fig. 17).

(Fig. 16) (Fig. 17)

FINDER SCOPE ALIGNMENT

Since a telescope has a narrow field of view by design, it can be challenging to locate a particular star or planet. For this reason the telescope is fitted with a low-power, wide- field miniature telescope called a finder scope. Always use your finder scope to locate the object you want to view FIRST. The finder scope should be aligned with the main telescope tube before you begin using the telescope, in order that both scopes are positioned to always provide exactly the same angle and view.

Note: Objects in the finder scope are upside down. This is normal and is common to all astronomical telescopes.

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