instruction Manual Orion EON Apochromatic ED Refractors ® ™ #9781 EON 72mm, #9927 EON 80mm, #9925 EON 120mm Customer Support (800) 676-1343 E-mail: support@telescope.com Corporate Offices (831) 763-7000 Providing Exceptional Consumer Optical Products Since 1975 89 Hangar Way, Watsonville, CA 95076 IN 326 Rev.
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 experience. The ED glass in the objective lens yields extremely sharp, high-contrast images with virtually no color distortion compared to a standard refractor. The smooth and fine movement of the dual-speed Crayford focuser allows for easy and precise focusing.
2" Dual-Speed Crayford Focuser The high quality dual-speed 2" Crayford focuser is one of the most important components of your EON refractor. The Crayford design allows for smooth, precise focusing without any image shift that typical rack-and-pinion designs experience. For quick focusing of your EON refractor, the two larger focus knobs will provide a coarse focus.
3. Secure the barrel in place by firmly tightening the thumbscrew on the 1.25" eyepiece adapter. To attach a 2" diagonal or extension tube to your telescope: 1. Loosen the thumbscrew on the Crayford focuser’s 2" eyepiece holder and remove the 1.25" eyepiece adapter. 2. Insert the barrel of your diagonal or extension tube into the 2" eyepiece holder. 3. Secure the barrel in place by firmly tightening the thumbscrew.
Connecting the EON 72mm and 80mm to a Tripod or Mount The EON 72mm and 80mm have a built-in mounting block ready to connect to a sturdy camera tripod or telescope mount (Figure 7). The mounting block is threaded to accept a common 1/4"-20 stud found on almost any camera tripod. To connect the EON 72mm or 80mm to a camera tripod, simply screw the 1/4"-20 stud found on your camera tripod to the underside of the EON’s mounting block.
Using Different Eyepieces The EON refractors work well with virtually any 1.25" or 2" eyepiece. Because the EON refractors implement high-quality ED optics, the eyepieces you use should also have excellent, fully multi-coated optics to utilize the full performance of the EON. The diagonal used should also be a quality 90° mirror with high reflectivity. It is desirable to have a range of eyepieces of different focal lengths, to allow viewing over a range of magnifications.
Care & Maintenance Give your telescope reasonable care and it will last a lifetime. When not in use, keep its dust cover on as well as the dust cap on the eyepiece opening. Keep the telescope inside the hard storage carrying case when not in use. Store it indoors or in a dry garage. Do not leave the telescope outside except when using it. The optical tube is aluminum and has a smooth anodized surface that should resist scratches and smudges.
One-Year Limited Warranty The Orion EON Refractor is warranted against defects in materials or workmanship for a period of one year from the date of purchase. This warranty is for the benefit of the original retail purchaser only. During this warranty period Orion Telescopes & Binoculars will repair or replace, at Orion’s option, any warranted instrument that proves to be defective, provided it is returned postage paid to: Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076.
