Handleiding Bresser Messier Exos 1 (pagina 12 van 44) (Engels)

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you will see the bolt blocking the hole. Move the counterweight slightly

to make it disappear in its drill hole and reveal the hole. If it doesn‘t,

carefully loosen the counterweight screw until the bolt moves. Remove

the safety cover (23, illustration 1d) from the rod. Hold the counter-

weight firmly whilst moving it to about the middle of the counterweight

rod (22, illustration 1d). Tighten the counterweight fastening screw and

then replace the safety cover.

NOTE:

If the counterweight ever slips, the safety cap (23, Fig. 1d) prevents the counter-

weight from sliding entirely off the shaft. Always leave the safety cap in place when

the counterweight is on the shaft.

6. Set the latitude. Setting the latitude is easier if it is set before you attach the

optical tube to the assembly. Locate the latitude dial (28, Fig. 1d); note that

there is a triangular pointer above the dial located on the mount. The pointer

is not fixed; it moves as the mount moves.

Determine the latitude of your observing location. See APPENDIX B:

LATITUDE CHART, page 28-29, for a list of latitudes, or check an atlas.

Move the latitude T-handle screws in order to move the mount until the

pointer points to your latitude. The two T-handle screws (EXOS-2 only) work

in a „push - pull“ operation—as you tighten one, loosen the other. When the

pointer points at your latitude, tighten both screws until they make contact

with the mount. The EXOS-1 has on screw with similar operation.

At your observing site, set up the telescope assembly so that this leg

approximately faces North (or South in the Southern Hemisphere).

7. Attach the cradle assembly to the mount – Models R and N: Remove the

optical tube from the cradle and slide the cradle assembly (11, Fig. 1a) onto

the cradle mounting slot. See Fig. 7. The rounded base of the cradle assem-

bly fits into the rounded portion of the mounting slot. Tighten both the cradle

locking knob and the secondary locking knob to a firm feel.

8. Position optical tube – Models AR and NT: Unscrew the cradle ring lock

knobs (13, Fig. 1a) and open the cradle rings. While firmly holding the opti-

cal tube (10, Fig. 1a), position it onto the cradle rings (14, Fig. 1a) with

the mid-point of the optical tube’s length lying roughly in the center of the

cradle ring assembly. Point the tube so that the front end (this end comes

shipped with the dust cover (9, Fig. 1a) over it) is oriented as depicted

in Fig. 1a. Then close the cradle rings (14, Fig. 1a) over the optical tube.

Loosely tighten the cradle ring lock knobs just to hold the tube securely in

place until you balance it. See Balancing the telescope, page 13.

Attach viewfinder bracket

(Abb. 9b). Locate the viewfinder bracket

screws (15, Fig. 1b and Fig. 9a) and remove the nuts from the screws.

Slide the holes in the viewfinder bracket over the viewfinder bracket

screws. Replace the nuts and tighten to a firm feel only.

9a. Attach viewfinder tube:. Back off the viewfinder collimation screws (5,

Fig. 1b) and slide the viewfinder tube into the bracket. Orient the view-

finder eyepiece as depicted in Fig. 1b. Tighten the collimation screws

to a firm feel. See Aligning the viewfinder, page 14.

10. Insert the eyepiece: NT models (Fig. 10a): Lift to remove the dust cap

from the eyepiece holder on the focuser assembly. Set the dust cap

aside in a safe place and replace it when you have finished observing

to protect the eyepiece assembly. Back off the eyepiece thumbscrews

(1, Fig. 1a) and insert the supplied 25mm eyepiece (3, Fig. 1a) into

the the eyepiece holder. Tighten the holder thumbscrews to a firm

feel to secure the eyepiece. AR models (Abb. 10b): Lift to remove the

dust cap from the eyepiece holder on the focuser assembly. Set the

dust cap aside in a safe place and replace it when you have finished

observing to protect the eyepiece assembly. Back off the eyepiece

thumbscrews (1, Fig. 1b) and slide the diagonal prism into the holder

and tighten the thumbscrews to a firm feel only. Insert the supplied

25mm eyepiece (3, Fig. 1b) into the the diagonal prism. Tighten the

prism‘s thumbscrews to a firm feel to secure the eyepiece.

Looking at or near the Sun will cause instant and irreversible damage to your eye! 12

assemblInG exos-2

Fig. 8a: Place the optical tube

in rings and loosely tighten the

cradle ring lock knobs.

Cradle rings

Lock

knobs

Fig. 9b: Viewfinder assembly.

Slide bracket into slot.

Fig. 6a: Attach counterweight

assembly (EXOS-1)

Fig. 7: Mounting the cradle assembly

to the mount shaft (EXOS-2)

Cradle

assembly set

Safety cap

Counter-

weight

shaft

Counterweight

locking knob

Counter-

weight

Shaft base

DEC-setting circle

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