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Orion

®

 EON 80mm ED 

Apochromatic Doublet 

Refractor 

#10287

IN 662 6/21

INSTRUCTION MANUAL

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Copyright © 2021 Orion Telescopes & Binoculars. All Rights Reserved. No part of this product instruction or any of its contents 

may be reproduced, copied, modified or adapted, without the prior written consent of Orion Telescopes & Binoculars.

A N   E M P L O Y E E - O W N E D   C O M P A N Y

Congratulations on your purchase of the Orion EON 80 ED Apochromatic Refractor optical tube. 

Your 80mm f/7 ED has been designed with high quality optics and excellent mechanical construc-
tion. The ED glass in the objective lens means you’ll enjoy images with far less color distortion 
than those seen in a standard refractor, and the smooth and robust dual speed Rack and Pinion 
focuser will make getting sharp images a breeze. These instructions will help you set up and use 
your telescope tube.

Summary of Contents for EON 10287

Page 1: ...dapted without the prior written consent of Orion Telescopes Binoculars A N E M P L O Y E E O W N E D C O M P A N Y Congratulations on your purchase of the Orion EON 80 ED Apochromatic Refractor optical tube Your 80mm f 7 ED has been designed with high quality optics and excellent mechanical construc tion The ED glass in the objective lens means you ll enjoy images with far less color distortion t...

Page 2: ...tube rings are a series of 6mm 1mm per thread mounting holes designed to connect any auxiliary rail or other accessory to the top of your telescope Use of Optional Eyepieces Diagonal and Finder Scope The EON 80mm ED does not come with a finder scope diago nal or eyepieces in order to grant the user the greatest versatil ity in customizing the instrument to suit their tastes However certain rules f...

Page 3: ...ate the magnification or power of a telescope simply divide the focal length of the telescope by the focal length of the eyepiece Telescope F L Eyepiece F L Magnification For example the EON 80mm ED which has a focal length of 560mm used in combination with a 25mm eyepiece yields a power of 560 25 22 4x Every telescope has a useful limit of power of about 50x per inch of aperture Claims of higher ...

Page 4: ...using this method Use caution rubbing too hard may scratch the lens Clean only a small area at a time using a fresh lens tissue on each area Never reuse tissues Specifications Optical tube Seamless aluminum Objective lens diameter 80mm 3 1 Objective lens Apochromatic doublet rear element made of Fk 61 ED glass air spaced Objective lens coating Fully multi coated all air to glass surfaces multi lay...

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