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inStruCtion Manual
® ™
orion Eon apochromatic
ED refractors
#9781 Eon 72mm, #9927 Eon 80mm, #9925 Eon 120mm
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IN 326 Rev. A 01/08
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® ™ 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 instructio
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2" Dual-Speed Crayford Focuser The 72mm EON refractor has screw holes for an optional The high quality dual-speed 2" Crayford focuser is one of finder scope dovetail base attached to the rotating portion the most important components of your EON refractor. The of the focuser, allowing you to change the orientation of the Crayford design allows for smooth, precise focusing without finder scope as desired. any image shift that typical rack-and-pinion designs experi- The EON 72mm uses a single t
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3. Secure the barrel in place by firmly tightening the To insert a finder scope onto your EON refractor, slide the thumbscrew on the 1.25" eyepiece adapter. finder scope bracket into the finder scope dovetail base and secure it in place by tightening the thumbscrew(s) on the dove- To attach a 2" diagonal or extension tube to your telescope: tail base (Figure 6). 1. Loosen the thumbscrew on the Crayford focuser’s 2" eyepiece holder and remove the 1.25" eyepiece adapter. 2. Insert the barrel
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Connecting the Eon 72mm and 80mm to a when using heavy accessories, such as 2” eyepieces or t ripod or Mount DSLR cameras. To reverse the orientation of the mount- The EON 72mm and 80mm have a built-in mounting block ing block, remove the screw (using a 4mm hex key) that ready to connect to a sturdy camera tripod or telescope attaches the mounting block to the telescope tube and turn mount (Figure 7). The mounting block is threaded to accept it around 180° (Figure 9). Once the mounting block
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using Different Eyepieces you may need to use an extension tube for your particular The EON refractors work well with virtually any 1.25" or 2" imaging setup. Any imaging accessory, such as a color filter eyepiece. Because the EON refractors implement high-qual- wheel, increases the amount of inward focus travel required. ity ED optics, the eyepieces you use should also have excel- Before attaching any extra imaging accessory, try reaching lent, fully multi-coated optics to utilize the full
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Focuser: Dual Speed 11:1 Crayford, accepts Care & Maintenance 1.25" or 2" accessories, brass compression ring 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 Mounting: Mounting block, dovetail design, cap on the eyepiece opening. Keep the telescope inside the 1/4"-20 threaded hard storage carrying case when not in use. Store it indoors Weight: 5.0 lbs./2.27 kg or in a dry garage. Do not leave
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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 war- ranty 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. Proof o
