User manual CELESTRON POWERSEEKER 76 Instruction Manual

[. . . ] CAUTION: READ THIS SECTION BEFORE USING YOUR TELESCOPE Your PowerSeeker 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. [. . . ] Loosen the altitude slow motion rod locking screw (7) and the azimuth lock (11) on the base of altazimuth mount, then move the telescope in the desired direction. Look through the 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 in the eyepiece, rotate the fine adjustment ring located on the altitude slow motion rod assembly (3). Focusing 1. Once you have found an object in the telescope, turn the focusing knob (14) 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 When observing with a Newtonian reflector telescope, the image seen will be correct for daytime viewing. However the image will be rotated depending on the position of the focuser relative to the optical tube. Newtonian telescopes are designed for astronomical use rather than for daytime land viewing. 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 PowerSeeker 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 Therefore, if you use the 20mm eyepiece your magnification is 700/20 = 35x. The same formula can be applied to any of your eyepieces. 5 Important!Magnification through any telescope has its limits. These limits are determined by the laws of optics and the nature of the human eye. Most of your viewing will be done in the range of 35x to 120x. Higher powers are used mainly for lunar and sometimes planetary observing where you can greatly enlarge the image and the atmospheric conditions are near perfect. The images at extremely high powers magnify the image, but remember that the contrast will be very low due to the high magnification. For the brightest images with the most contrast, start by using the lower power eyepiece with a smaller image scale. The following magnification levels can be achieved when using the standard eyepiece in conjunction with the 3x Barlow lens: Eyepiece 20mm 4mm Magnification 35x 175x Mag. with 3x Barlow Lens 105x 525x TELESCOPE MAINTENANCE With proper care, your telescope should rarely need any maintenance work. To maintain your telescope in the best possible condition, observe the follow suggestions: 1. [. . . ] CELESTRON EXPRESSLY DISCLAIMS ANY LOST PROFITS, GENERAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT FROM BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR INABILITY TO USE ANY CELESTRON PRODUCT. ANY WARRANTIES WHICH ARE IMPLIED AND WHICH CANNOT BE DISCLAIMED SHALL BE LIMITED IN DURATION TO A TERM OF TWO YEARS FROM THE DATE OF ORIGINAL RETAIL PURCHASE. Some states do not allow the exclusion or limitation of incidental or consequential damages or limitation on how long an implied warranty lasts, so the above limitations and exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. [. . . ]