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1. Parts List
• EON 70mm ED Quadruplet Refractor
• Objective lens cap
• Focuser end cap
• Tube rings (pair)
• Lower mounting dovetail bar
• Upper accessory rail
• Dovetail finder scope base
• 54mm-48mm step down ring (includes 48mmx0.75mm filter
threads)
• 48mm-42mm step down ring (not shown)
• Hard case with custom foam interior
The EON 70mm ED Quadruplet refractor comes ready for use
from the factory. Your telescope’s optics have been assembled
and precisely collimated at the factory, so they should not require
any adjustments. Please keep the original shipping box. In the
unlikely event that you need to ship the telescope back to Orion
for warranty repair service, you should use the original packaging
WARNING:
Do NOT look at the Sun without a
professionally made
solar filter
on the telescope;
serious eye damage may result if you look at the
Sun with any unfiltered optical instrument. Do not
leave the telescope unsupervised around children.
Always cover the lenses when leaving the telescope
in direct sunlight.
2. Features and Functions
Your EON 70mm Quadruplet has premium features designed
to maximize the performance of the scope for imaging the night
sky. Most notably, the air-spaced four-element designed objec-
tive lens contains Hoya FCD100 extra-low dispersion (“ED”)
glass, which minimizes chromatic aberration and also provides
a very well corrected flat field of view for impeccably clean, sharp,
high-resolution images without the need for extra field flatten-
ing lenses.
Retractable Dew Shield
The dew shield of the EON 70mm Quad is retractable, allowing
the telescope to become more compact for storage. To extend
the dew shield, simply pull it forward until it stops. Extend the
dew shield while imaging to block extraneous light and to fore-
stall the formation of dew on the exposed surface of the objec-
tive lens. If you look closely at the back end of the dew shield
bevel, you will find three small allen head setscrews (
Figure 1
),
which can be slightly tightened down to secure the dew shield in
place. Under normal operation this shouldn’t be necessary, but
if you use a light box to lay over the dew shield when the tele-
scope is pointed straight up in order to capture flat field calibra-
tion frames, tightening these setscrews down will prevent the
dew shield from contracting under the weight of the light box.
Don’t forget to loosen these setscrews slightly before retracting
the dew shield.
Dual-Speed Focuser
The 70mm Quad features an incredibly well build 3" rack-and-
pinion focuser with 10:1 reduction gearing, and bias (diagonal)
cut on the rack to provide exceptionally smooth, backlash-free
Figure 1
.
Features and parts of the EON 70mm ED Quadruplet Astrograph
54mm female threads
Vixen dovetail bar
Top accessory rail
Focus knob (dual speed knob opposite side)
Dew shield locking setscrews
(3x around perimeter
Finder dovetail shoe
Retractable dew shield
54mm-48mm
adapter
Camera rotation lock knob
