User manual CELESTRON POWERSEEKER 50 Instruction Manual

[. . . ] 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. NEVER USE YOUR TELESCOPE TO PROJECT AN IMAGE OF THE SUN ONTO ANY SURFACE, OR USE AN EYEPIECE SOLAR FILTER OR A HERSCHEL WEDGE. [. . . ] Locate a distant daytime object and center it in a low power eyepiece in the main telescope. Look through the finderscope and take notice of the position of the same object. Without moving the main telescope, turn the adjustment thumb screws located around the finderscope bracket until the crosshairs of the finder are centered on the alignment object. Finding Objects 1. Loosen the altitude locking screw (3) on the base of tripod head (4), 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. Focusing 1. Once you have found an object in the telescope, turn the focusing knob (6) 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 PowerSeeker 50 telescope has a focal length of 600mm 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 Important! Therefore, if you use the 20mm eyepiece your magnification is 600/20 = 30x. These limits are determined by the laws of optics and the nature of the human eye. 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. 5 The following magnification levels can be achieved when using the standard eyepiece in conjunction with the 3x Barlow lens: Eyepiece 20mm 12mm 4mm Magnification 30x 50x 150x Mag. with 3x Barlow Lens 90x 150x 450x 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. When your telescope isn't in use, replace all lens covers to keep dust and contaminants off the optical surfaces. [. . . ] 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. [. . . ]