User manual CELESTRON FIRSTSCOPE 21070

[. . . ] Before embarking upon an exploration of the sky, please take time to read this manual and familiarize yourself with both the parts and operation of your telescope. WARNING NEVER LOOK DIRECTLY AT THE SUN WITH THE NAKED EYE OR WITH A TELESCOPE. NEVER POINT YOUR TELESCOPE AT THE SUN UNLESS YOU ARE USING THE PROPER SOLAR FILTER. PERMANENT AND IRREVERSIBLE EYE DAMAGE MAY RESULT. [. . . ] The alignment procedure is best done at night since the LED dot will be difficult to see during the day. To turn on the Star Pointer, rotate the variable brightness control clockwise until you here a "click". To increase the brightness level of the red dot, continue rotating the control knob about 180º until it stops. Locate a bright star or planet and center it in a low power eyepiece in the main telescope. With both eyes open, look through the glass window at the alignment star. If the Star Pointer is perfectly aligned, you will see the red LED dot overlap the alignment star. If the Star Pointer is not aligned, take notice of where the red dot is relative to the bright star. Right ascension hours are also divided into minutes of arc and seconds of arc, with each hour having 60 minutes of arc and each arc minute being divided into 60 arc seconds. Astronomers prefer the time designation for RA coordinates even though the coordinates denote locations on the celestial sphere. Using time makes it easier to tell how long it will be before a particular star will cross a particular north-south line in the sky. RA coordinates are marked off in units of time eastward from an arbitrary point on the celestial equator, in the constellation Pisces. First, move the telescope in declination to the correct declination coordinate. Then move the telescope in right ascension until the indicator points to the correct coordinate. After moving the telescope to the correct celestial coordinates, look through the lower power eyepiece to see if you have located the object you wish to view. If the object is not visible in the eyepiece, gradually pan the telescope, using the right ascension and declination cables, until the object is visible. 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 60 telescope has a focal length of 900mm 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 900/20 = 45x. 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. [. . . ] This useful guide also includes beautiful constellation paintings, photographs, and clear, concise descriptions of stars, the planets, the sun, the moon, comets, black holes, galaxies and more. Planisphere (#93720) - A colorful rotating star map that indicates when specific constellations are visible, with removable markers for tracking the movement of planets. Available in three different latitudes: 30°, 40°, and 50° all ±10°. A full description of all Celestron accessories can be found in the Celestron Accessory Catalog (#93685). 16 CELESTRON TWO YEAR WARRANTY A. [. . . ]