Bedienungsanleitung Meade Goto-Kit for equatorial EQ-5 Mounts (Seite 31 von 40) (Englisch)

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Instruction Manual

The Polar Alignment Viewfinder

Typically handbox‘s pointing capabilities are sufficient for most telescope

observers, and the use of the polar alignment viewfinder is unnecessary for

them. However, for those observers who need to meet the more demanding

requirements of astrophotography, the polar alignment viewfinder allows the

telescope mount to be more precisely aligned with true North. The polar align-

ment viewfinder contains a reticle, lit by an LED (Figs. 43a and 43b).

To align your telescope to North using the polar alignment viewfinder:

1. Set your telescope in the home position (see page 15). Then loosen the Dec.

lock (1, Fig. 1a) and rotate the optical tube 90°. Re-tighten the Dec. Lock.

2. Loosen the R.A. Lock (17, Fig. 1a).

3. Remove the polar viewfinder cap (2, Fig. 1a).

4. If you have not already done so, remove the plastic separating the watch

batteries inside the polar alignment reticle. See step 11, page 11.

5. Turn the polar alignment reticle LED knob to turn on the LED and look

through the reticle.

6. Northern Hemisphere: Move the telescope mount until Polaris is superim-

posed on the graduated area of the reticle (between 40‘ and 60‘). The center

crosshair denotes the North celestial pole. Southern Hemisphere: The four-

sided figure in the reticle represents a grouping of four stars in Octantis

(Sigma, Tau, Chi, and Upsilon) for use in the Southern Hemisphere. Move

the telescope mount on its R.A. axis until the four stars depicted in the reticle

are superimposed on the four star group that matches the reticle pattern.

7. Use the latitude T-handle screws (10, Fig. 1a) and the fine azimuth control

knobs (11, Fig. 1a) to fine tune the mount adjustment until the reticle pattern

is more precisely superimposed over the appropriate position as described

in step 6.

Note: Not all pointing positions are possible with the polar alignment

reticle, as the tripod is a limiting factor as to how far the optical tube and

mount can be moved.

8. Tighten the R.A. Lock (17, Fig. 1a). Return the optical tube to the home posi-

tion.

Note: Remember to turn off the polar alignment reticle LED.

Enhancement Methods

The handbox provides four methods of enhancing your telescope’s pointing

precision:

#1: Three-Star Alignment and

#2: Axis Alignment and #3 for Axis Alignment with the handbox.

Method #1 is recommended for all users, but especially for the beginner and

Methods #2 and #3 are recommended for the Advanced observer.

Method #1: Three-Star Alignment Using the handbox

Perform this procedure at night. This method is similar to Two-Star Alignment

(see page 35), but in this method, the handbox chooses three stars to align

upon: Two stars on one side of the sky and a third star on the opposite side of

the sky.

In order to get the most out of this procedure, make sure you perform the Train

the Drive procedure (see page 17). The combination of Training your Drive and

performing Three-Star Alignment will optimize your pointing accuracy.

To perform the Three-Star Alignment:

1. Keep pressing MODE until „Select Item: Setup“ is displayed. Press

ENTER.

2. „Setup: Align“ displays. Press ENTER. „Align: Easy“ displays. Press the

Scroll Down key until “Align: Three-Star” displays. Press ENTER.

3. „German North“ displays and a scrolling message prompts you to set your

telescope in the polar home position. See SETTING THE POLAR HOME POSITION,

page 14, for a description of this procedure. Press ENTER after you finish the

procedure.

Fig. 43a: The polar alignment view-

finder.

Fig. 43b: The view inside the polar

alignment viewfinder reticle.

Appendix B:

Enhancing Pointing Precision

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