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Fabricant : Celestron Taille : 371.76 kb Nom Fichier : 7bcc130c-68b8-4831-9ecf-6645f35afb7c.pdf Langue d'enseignement:

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-to-side). “Mount" refers to the part of the telescope that supports the tube, which carries all the telescope’s optics. Altitude lock - allows the telescope tube to be locked into place once a focused image has been set up, by tightening the two screws on the outside of the altazimuth mount. Aperture - the diameter (in millimeters) of the objective lens. The larger the aperture, the more light the telescope collects. More light creates a brighter, clearer image. Focal length - the distance from the optical center of the lens to the point where the incoming light rays converge, creating a clear, focused image. Objective lens - the front lens of the telescope. It gathers incoming light to create a sharply focused image. Refracting telescope - a long, thin tube where light passes in a straight line from the front objective lens directly to the eyepiece at the opposite end of the tube. This telescope is a classical refracting telescope w'ith a 50 or 60mm objective lens. Its light gathering power (60mm) is about 75 times that of the unaided human eye and 50 times that for the 50mm telescopes. With this telescope you’ll be able to study craters on the moon, watch Jupiter’s moons as they circle the gas giant, view Saturn’s rings and the phases of Venus. You’ll also be able to observe bright double stars. The 60mm telescopes can also be used to observe the brighter nebulae and large star clusters. But your Celestron telescope is not limited to astronomical viewing. It can also be used for terrestrial viewing of the world around you, such as observing wildlife and distant views. First, you need to take the time to familiarize yourself with the parts of your telescope, then assemble it, following the easy instructions provided. Next, read over the operating instructions and become familiar with how your telescope works, to prepare for hours of viewing enjoyment. CAUTION: READ THIS SECTION BEFORE USING YOUR TELESCOPE Your Celestron telescope is designed to give you hours of fun and rewarding observing. However, there are a few things to be aware of before using your telescope that will ensure your safety and protect your equipment. NEVER look directly at the sun with the naked eye or with a telescope. Never point your telescope at the sun unless you’re using the proper solar filter. Permanent and irreversible eye damage may result. NEVER use your telescope to project an image of the sun onto any surface, or use an eyepieee solar filter or a herschel wedge. Internal heat build-up can damage the telescope and/or any accessories that may be attached to it. NEVER leave your telescope unsupervised, especially when children are present. This also holds true for adults who may not be familiar with the correct operating procedures for your telescope. ALWAYS cover the finderscope when using your telescope with a correct solar filter. Although small in aperture, thi...

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