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Фрагмент инструкции
A 01/08 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. These instructions will help you use your EON refractor optical tube assembly. Figure 1a. The EON 72mm and 80mm ED Refractor optical tube assembly Focus rotation lock ring (for EON 80mm only) Finder scope dovetail base (for EON 80mm only) 2" Eyepiece holder 1.25" Eyepiece adapter Coarse focus knob Fine focus knob Mounting block Dew shield Dovetail mounting plate Tube rings Finder scope dovetail base Tube ring clamps Figure 1b. The additional features of the EON 120mm 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 original packaging to ensure the telescope stays intact during shipping. Take a moment to inspect the telescope and all of its parts. Functions and Features The EON refractors have several features designed to maximize 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 telescope under the night sky! retractable Dew Shield All EON refractors feature a retractable dew shield which allows the telescope to become more compact for storage. 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 reducing 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. 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. For more precise focusing, as needed for applications such as critical high power planetary observing and digital imaging, the smaller black focus knob (Figure 1a) offers fine focus adjustment. The fine focus knob rotates eleven times to one single rotation of the coarse focus knobs, making an 11:1 ratio for extremely precise focusing. The dual-speed Crayford is capable of handling the weight of heavy accessories, such as large 2" eyepieces or a CCD or DSLR camera. Adding tension to the focuser drawtube will further increase the amount of weight the focuser can handle without slipping. To adjust the focuser drawtube tension, locate the focus tension set screw on the underside of the focuser (Figure 3). Using the 2.5mm hex key, turn the set screw clockwise until you have added the appropriate amount of tension for your needs. In some cases, you may want to loosen the tension, which will also decrease the resistance of the focus knob movement. Simply turn the focus tension set screw counter-clockwise as needed to loosen the focus drawtube tension. Tightening the focus lock thumbscrew (Figure 3) will prevent the drawtube from moving. This feature can be utilized for imaging, or visual use, when you have achieved focus and do not want the drawtube to move. While you are focusing, make sure the focus lock thumbscrew is loosened, or the drawtube may not move properly. Note: Applying too little tension on the focuser will result in the focus drawtube to slide under its own weight, or under the weight of your accessories installed. Make sure there is enough tension to support your 2"or 1.25" accessories. Focuser rotation The focuser assembly on the EON refractors have the ability to be rotated. Under normal use, you should not have to rotate the focuser, since the eyepiece and diagonal can be rotated instead. However, focuser rotation can be beneficial for changing the camera orientation while imaging (see “Imaging with the EON Refractors”). Additionally, this feature can allow you to keep the focus knobs parallel to the ground no matter how your telescope is posit...