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Manafacture: Celestron File size: 601.34 kb File name: Language of manual:

(This knob is already attached to the mount and does NOT need to be installed.) Once loose, point the telescope to the desired area and tighten the azimuth tension knob. 5 NOTE: Disassembling and T ransporting Your FirstscopeAZ For fine adjustments in azimuth, turn the slow motion control knob on the left side of the mount. Turning the knob clockwise moves the telescope to the right while turning it counterclockwise moves the telescope to the left. The azimuth slow motion knob will NOT work while the azimuth tension knob is loose. The azimuth tension knob must be fully tightened before you can use the azimuth slow motion control knob. ,Once assembled, the telescope can be left set up. The entire unit is light enough to pick up and carry outside for a casual observing session. If, however, you want to transport your Firstscope AZ to a remote observing location, you should partially disassemble your telescope for easy transportation. 1. Remove the optical tube from the altazimuth mount. Wrap the tube in cloth to prevent it from being scratched or dented. Perform the steps for attaching the telescope in reverse order. 2. Fold the tripod legs together. The mount does NOT have to be removed if you are transporting the telescope yourself. You are now ready to transport the telescope to your observing site. If you are shipping the telescope via a common carrier, you should completely disassemble the telescope and return all parts to the original shipping container. 6 TELESCOPE BASICS Attaching the Accessories Once your telescope has been fully assembled, you are ready to attach the accessories. The Accessory Adapter The accessory adapter is the short black tube with the set screw that allows the attachment of visual accessories (i.e., the star diagonal, erect image diagonal, eyepieces, etc.). The accessory adapter comes attached to the focus tube and is removed only when attaching photographic accessories. Erect Image Diagonal The erect image diagonal is a prism that diverts the light at a 45° angle to the light path of the telescope. In addition to placing the eyepiece in physically comfortable viewing positions, this accessory also provides correctly oriented images. To attach the erect image diagonal: 1. Loosen the thumbscrew on the accessory adapter until it no longer obstructs the inner diameter. 2. Slide the chrome portion of the erect image diagonal into the accessory adapter. 3. Tighten the thumbscrew on the accessory adapter to hold the diagonal in place. If you wish to change the orientation to the erect image diagonal, loosen the thumbscrew on the accessory adapter until the diagonal rotates freely. Move the diagonal to the desired position and tighten the thumbscrew. The Eyepieces The eyepiece, or ocular, is an optical element that magnifies the image focused by the telescope. The eyepiece(s) fit into either the accessory adapter directly or into the erect image diagonal. To install an ocular: 1. Loosen the set screw on the erect image diagonal so that it does not obstruct the inner diameter. 2. Slide the chrome portion of the eyepiece into the diagonal. 3. Tighten the set screw. To remove the ocular: 1. Loosen the set screw on the diagonal. 2. Slide the eyepiece out of the diagonal. You can replace it with another ocular. 7 Focusing Aligning the Finder Eyepieces are commonly referred to by focal length, which is printed on the eyepiece barrel. The longer the focal length (i.e., the larger the number) the lower the power. Conversely, the shorter the focal length (i.e., the smaller the number) the higher the magnification. Generally, you will use low to moderate power when viewing. For more information on how to determine power, see the section on “Calculating Magnification.” In addition, eyepieces are also referred to by barrel diameter. These Celestron refractors use eyepieces with a barrel diameter of 1-1/4". To focus your telescope, simply turn either of the focus knobs located directly opposite the finderscope. Turn the focus knob until the image is sharp. Once sharp, turn the knob towards you to focus on an object that is closer than the one you are currently observing. Turn the knob away from you to focus on a more distant object than the one you are currently observing. In addition to understanding how the focusing mechanism works, there are a few focusing hints to remember when using any optical instrument. • Avoid looking through glass. Glass found in household windows is optically imperfect, and as a result, may vary in thickness from one part of a window to the next. This inconsistency can and will affect the ability to focus your telescope. In most cases, you will not be able to achieve a truly sharp focus. In some cases, you may actually see a double image. • Never look across or over objects producing heat waves. This includes asphalt parking lots on hot summer days or building rooftops. • Hazy skies, fog, and mist can also make it difficult to foc...

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