Handleiding Meade Goto-Kit for equatorial EQ-5 Mounts (pagina 8 van 40) (Engels)

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Instruction Manual

Telescope setup

Balancing the telescope

In order for the telescope to be stable on the tripod and also for it to move

smoothly, it must be balanced. To balance the telescope, unlock the Right

Ascension or R.A. lock (17, Fig. 1a). When this axis is unlocked, the telescope

pivots on the R.A. axis. Later in the procedure, you will also unlock the Declination

or Dec. lock (1, Fig. 1a). When unlocked, the telescope pivots on the Dec. axis.

Most of the motion of the telescope takes place by moving about these two

axes, separately or simultaneously. Try to become familiar with these locks and

observe how the telescope moves on each axis. To obtain a fine balance of the

telescope, follow the method below:

1. Firmly hold the optical tube secure so that it cannot accidentally swing

freely. Loosen the R.A. lock (17, Fig. 1a). The optical tube now moves freely

about the R.A. axis. Rotate the telescope so that the counterweight shaft (6,

Fig. 1a) is parallel (horizontal) to the ground.

REMARK!

The LXD-75 mount comes with a 4,5 kg counterweight. In case that you do

not suceed in balancing the mount., it could be necessary to use a second

or third counterweight . Those are available as an optional accessory. Make

sure however that a higher total weight affects stability of your complete

setup negatively.

2. Unlock the counterweight lock knob and slide the counterweight (5, Fig. 1a)

along the counterweight shaft until the telescope remains in one position

without tending to drift down in either direction. Then re-tighten the coun-

terweight lock knob, locking the counterweight in position.

3. Again, hold the optical tube so that it cannot accidentally swing freely. Lock

the R.A. lock (17, Fig. 1a), and unlock the Dec. lock (1, Fig. 1a). The tele-

scope now is able to move freely about the Dec. axis. Loosen the cradle ring

lock knobs so that the main tube slides easily back and forth in the cradle

rings. Move the main tube in the cradle rings until the telescope remains in

one position without tending to drift down in either direction. Re-lock the

Dec. lock (1, Fig. 1a).

The telescope is now properly balanced on both axes. Next, the viewfinder must

be aligned.

Observing by Moving the Telescope Manually

After the telescope is assembled and balanced as described previously, you

are ready to begin manual observations. View easy-to-find terrestrial objects

such as street signs or traffic lights to become accustomed to the functions and

operations of the telescope. For the best results during observations, follow the

suggestions below:

• When you wish to locate an object to observe, first loosen the telescope’s

R.A. lock (17, Fig. 1a) and Dec. lock (1, Fig. 1a). The telescope can now turn

freely on its axes. Unlock each axis separately and practice moving your

telescope. Then practice with two unlocked axes at the same time. It is very

important to practice this step to understand how your telescope moves,

as the movement of an equatorial mount is not intuitive.

•

Use the aligned viewfinder to sight-in on the object you wish to observe. When the

object is centered in the viewfinder’s crosshairs, re-tighten the R.A. and Dec. locks.

• A telescope’s eyepiece magnifies the image formed by the telescope’s main

optics. Each eyepiece has a focal length, expressed in millimeters, or “mm.”

The smaller the focal length, the higher the magnification. For example, an

eyepiece with a focal length of 9mm has a higher magnification than an eye-

piece with a focal length of 26mm.

Low-power magnification eyepieces offer a wide field of view, bright, high-

contrast images, and relief of eye strain during long observing sessions. To

observe an object with a telescope, always start with a low power eyepiece

such as the SP 26mm supplied with your telescope. When the object is

centered and focused in the eyepiece, switch to a higher power eyepiece to

enlarge the image as much as practical for prevailing viewing conditions.

• Once centered, an object can be focused by turning one of the knobs of the

focusing mechanism. Notice that when observing astronomical objects, the

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