User manual CELESTRON FIRSTSCOPE 70 AZ REFRACTORS

[. . . ] FIRSTSCOPE 60 AZ REFRACTORS MODELS #21052 FIRSTSCOPE 70 AZ REFRACTOR MODEL #21071 INSTRUCTION MANUAL 2 INTRODUCTION Congratulations on your purchase and welcome to the Celestron world of amateur astronomy. Some of the terms and parts described in these instructions may be new to you, so a few commonly used terms you'll want to be familiar with are defined below. Altazimuth mount - the simplest type of mount, with two motions: altitude (up and down) and azimuth (side-toside). "Mount" refers to the part of the telescope that support the tube, which carries all the telescope's optics. [. . . ] The Star Pointer is now ready to be used . Remember to always turn the power off after you have found an object. This will extend the life of both the battery and the LED. Finding Objects 1. Loosen the altitude locks on the sides of the telescope tube and the silver azimuth lock on the base of altazimuth mount, then move the telescope in the desired direction. Look through the Star Pointer finderscope and pan the telescope until the object appears in the field of view. Once it's in the field, tighten the altitude and azimuth locks. To center the object with the red dot in the Star Pointer, use the fine adjustment ring on the altitude slow motion rod assembly. Focusing 1. Once you have found an object in the telescope, turn the focusing knob until the image is sharp. 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. To achieve a truly sharp focus, never look through glass windows 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. When observing straight through, with the eyepiece inserted directly into the telescope, the image will be inverted. Also, the image in the finderscope is inverted. 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. The Firstscope telescope has a focal length of 700mm and comes with a 20mm 1¼" eyepiece. To calculate magnification, use the following formula, in which FL = focal length: Magnification = FL (telescope) in mm FL (eyepiece) in mm 6 Therefore, if you use the 20mm eyepiece your magnification is 700/20 = 35x. The same formula can be applied to any of your eyepieces. Celestron offers numerous optional eyepieces to expand your range of magnification. Eyepieces come in barrel diameters of . 96" and 1¼". In general, 1¼" eyepieces are of a higher optical quality and give you sharper images, along with a wider field of view and better eye relief. Magnification through the telescope has its limits. These limits are determined by the laws of optics and the nature of the human eye. [. . . ] Celestron warrants this telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to the obligation of Celestron to repair or replace such product, the product must be returned to Celestron together with proof-of-purchase satisfactory to Celestron. The Proper Return Authorization Number must be obtained from Celestron in advance of return. [. . . ]