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Hersteller: Celestron Dateigröße: 371.76 kb Dateiname: Unterrichtssprache:

Without this eyepiece, the image you see is reversed from left to right, when using the standard diagonal. To use the erecting eyepiece, remove the diagonal and insert the erecting eyepiece directly into the focuser (see diagram above). Then use a low power .96" eyepiece such as the 20mm, inserting it directly into the erecting eyepiece. Aligning the Finderscope 1. Point the telescope at a stationary object (e.g., a stop sign) at least 100 yards away. Looking through the eyepiece (make sure all caps have been removed), focus on the object seen in the main telescope by turning either of the focus knobs on the telescope tube. 2. Carefully center the object in your field of view. 3. Look through the finderscope at the object. If the object needs to be centered, use the three screws holding the finderscope in its bracket to accomplish this. Loosen and adjust the screws, two at a time, until the cross hairs are fixed on the object centered in the main telescope. Tighten the set screws and check alignment again. Finding Objects 1. Loosen the altitude locks on the sides of the telescope tube and the silver azimuth lock on the base of the altazimuth mount, then move the telescope in the desired direction. 2. Look through the finderscope and pan (up/down and left/right) the telescope until the object appears in the field of view. Once it’s in the field, tighten the altitude and azimuth locks. 3. To center the object in the finderscope, use the fine adjustment ring on the altitude slow motion rod assembly -for Firtscope 60 models only. For the Novice telescopes, use the fine adjustment ring on the eyepiece of the finderscope. Focusing 1. Once you have found an object in the telescope, turn the focusing knob until the image is sharp. 2. To focus on an object that is nearer than your current target, turn the focusing knob toward the eyepiece (i.e., so that the focusing tube moves away from the front of the telescope). For more distant objects, turn the focusing knob in the opposite direction. 3. To achieve a truly sharp focus, never look through glass w indows or across objects that produce heat waves, such as asphalt parking lots. Image Orientation 1. When observing with a diagonal, the image will be right side up, but reversed from left to right. 2. When observing straight through, w ith the eyepiece inserted directly into the telescope, the image w ill be inverted. Also, the image in the finderscope is inverted (which is normal). Using the Altitude Slow Motion Rod Assembly This assembly is used to elevate or lower (up or dow n) the vertical aim of the telescope tube in very small increments After makins rough adjustments, then tighten the thumb screw which locks the rod to the mount Then, turn the thumbwheel to make fine altitude (up down) adjustments. S Magnification The magnification (or power) of a telescope varies depending upon the focal length of the eyepiece being used and the focal length of the telescope. For example, we will use the Firstscope 60 telescopes.that have a focal length of 700mm and come with a 20mm eyepiece. To calculate magnification, use the following formula, in which FL = focal le...

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