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te l e s c o p e fe at u r e s
Looking at or near the Sun will cause instant and irreversible damage to your eye!
5
Messier series: Your personal
window to the universe
The Messier series models are versatile, high-resolution telescopes.
The Messier series models offer unmatched mechanical performance.
The Messier series telescopes reveal nature in an ever-expanding level of
detail. Observe the feather structure of an eagle from 150 yards or study
the rings of the planet Saturn from a distance of 800 million miles. Focus
beyond the Solar System and observe majestic nebulae, ancient star clusters,
and remote galaxies. Messier series telescopes are instruments fully capable of
growing with your interest and can meet the requirements of the most demand-
ing advanced observer. Refer to Figures 1a through 1d for the following fea-
tures:
Description of the features (Fig. 1a to 1d)
1 Eyepiece Thumbscrews: Tightens the eyepiece (see 3) in place.
Tighten to a firm feel only.
2 Eyepiece Holder: Holds eyepiece in place. Holders supplied for both
1.25“ and 2“ eyepieces (2“only for EXOS2 AR-models)          Diagonal
Prism (not shown, achromatic refractor models only): Provides a more
comfortable right-angle viewing position. Slide the diagonal prism
directly into the eyepiece holder (see 2) and tighten the thumbscrew
on the eyepiece holder to a firm feel only. See page 10 for a photo
and more information.
3 Eyepiece: Place the supplied eyepiece into the eyepiece holder or
the diagonal prism and tighten in place with the eyepiece thumbscrew
(see 2). The eyepiece magnifies the image collected in the optical
tube.
4 8 x 50mm Viewfinder: (6x30 only for smaller models) A low-power,
wide-field sighting scope with reticle that enables easy centering of
objects in the telescope eyepiece.
5 Viewfinder Collimation Screws: Use these screws to adjust the
alignment of the viewfinder.
6 Viewfinder Front Cell and Locking Ring: Adjust the front cell to focus
the viewfinder. See step 3, page 10 for more details. The viewfinder is
supplied with a small dust cover placed over the front cell.
7  Viewfinder Bracket: Holds the viewfinder in place.
8 Focus Knobs: Moves the telescope’s focuser drawtube in a finely-
controlled motion to achieve precise image focus. The Messier series
telescopes can be focused on objects from a distance of about 500 ft.
to infinity. Rotate the focus knobs to focus on objects.
9 Dust Cover: Place the dust cover (not visible in photo) over the optical
tube when storing the telescope.
NOTE:
The dust cover should be replaced after each observing session. Allow
time for any dew that might have collected during the observing session
to evaporate prior to replacing the dust cover.
10 Optical Tube: The main optical component that gathers the light from
distant objects and brings this light to a focus for examination through
the eyepiece.
11 Cradle Assembly: Attaches to mount base. See 9.
13 Cradle Ring Lock Knobs (2 pcs.) and Washers
14 Cradle Rings: Part of the cradle assembly (see 11); hold the optical
tube firmly in place.
15  Viewfinder Bracket Screws: Tighten to a firm feel to hold viewfinder
securely in place (see 4). See page 10 for more information.
16 Focus Lock Knob: Designed to prevent the focuser drawtube from
moving when a heavy accessory, such as a camera, is attached to
B
Which eyepiece is suitable for
which application? See p. 16
“choosing an eyepiece”
H
How do I mount the viewfin-
der? See p. 10, 9/9a
E
How do I adjust the finder-
scope? See p. 14
1!
Want to learn more about
mounting the telescope? See
p. 8-10 (Exos1) / p. 11-12
(Exos2)
5


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