Parts List, Getting Started, Functions and Features

Congratulations on your purchase of an Orion® EON™ ED Apochromatic Refractor optical tube assembly. The exceptional optical and mechanical quality of your EON refractor will provide you with a pleasing telescope experi- ence. The ED glass in the objective lens yields extremely sharp, high-contrast images with virtually no color distor- tion compared to a standard refractor. The smooth and fine movement of the dual-speed Crayford focuser allows for easy and precise focusing. These instructions will help you use your EON refractor optical tube assembly.

Focus rotation lock ring	Finder scope dovetail base
(for EON 80mm only)	(for EON 80mm only)
2" Eyepiece
holder

Dew shield

Mounting block

1.25"
Eyepiece	Fine focus knob
adapter	Fine focus knob
Coarse focus knob

Figure 1a. The EON 72mm and 80mm ED Refractor optical tube assembly

Parts List

EON 72mm & 80mm Optical tube assembly

Dust Cover

1.25" eyepiece adapter 2.5mm hex key

Hard carrying case

EON 120mm Optical tube assembly

Dust Cover

1.25" eyepiece adapter Tube rings (quantity 2) Dovetail mounting plate 2.5mm hex key

Hard carrying case

Getting Started

Your EON refractor is fully assembled from the factory. The optics have been installed and collimated, so you do not need to make any adjustments to them.

We recommend keeping all of the original packaging. In the unlikely event you should need to ship the telescope back to Orion for warranty repair service, you should use the origi- nal packaging to ensure the telescope stays intact during shipping.

Take a moment to inspect the telescope and all of its parts.

Tube rings

Tube ring

clamps

Finder scope dovetail base

Dovetail mounting plate

Figure 1b. The additional features of the EON 120mm ED Refractor optical tube assembly

Functions and Features

The EON refractors have several features designed to maxi- mize the use and enjoyment of your telescope. When you have become familiar with all of the functions of your EON refractor, you will be ready to begin using your new tele- scope under the night sky!

Retractable Dew Shield

All EON refractors feature a retractable dew shield which allows the telescope to become more compact for stor- age. The dew shield’s primary purpose is to prevent dew (water condensation) from forming on the lens during cold and humid nights. The dew shield is also useful for reduc- ing glare under unwanted outside lights. To extend the dew shield, remove the optical tube dust cover, then pull the dew shield outward until it stops (Figure 2).

Figure 2. Gently pull the dew shield outward until it stops.