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Summary of Contents for Celestron 80mm
- Page 1 Model #21072 F80 EQ WA 80mm (3.1”) REFRACTOR TELESCOPE INSTRUCTION MANUAL...
- Page 2 Figure 1...
- Page 3 Tube Ring Square Extrusions Finderscope Knurled Screw (opposite of tube ring hinge) Finder Bracket Focusing Set Screw Mounting Platform Figure 2...
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Page 4: Telescope Assembly
1. INTRODUCTION Thank you for purchasing this Celestron 80mm Refractor Equatorial Telescope. This telescope is a precision scientific instrument. With it you will enjoy numerous objects in the sky—planets, nebulae, star clusters, galaxies and other astronomical objects. But, before your journey begins take time to read this manual to familiarize yourself with the operation and parts of this telescope. - Page 5 Slide the remaining tube ring towards the objective end of the telescope tube. Place the telescope tube on the mounting platform and orient it so that the objective lens is opposite the slow motion control handles.
- Page 6 Look at the latitude scale (#19) and move the mount to the latitude of your location and then tighten the polar axis knob. This only has to be done once unless you take the telescope to a different location. For example, Los Angeles, California is located at about 34º.
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Page 7: The Celestial - Coordinate System
Aligning the Finderscope: Do not be alarmed when you look through the telescope and the object is upside down and reversed left to right. This is normal with an astronomical telescope. To align it: Choose a target in excess of one mile away. This will eliminate any possible parallax effect. -
Page 8: Polar Alignment
Given the celestial coordinate system, it now becomes possible to find celestial objects by translating their celestial coordinates using telescope pointing positions. For this you use setting circles for R.A. and Dec. to find celestial coordinates for stellar objects which are given in star charts and reference books. - Page 9 So, if using a motor drive, the objects observed through the telescope appear stationary (they do not drift out of the field of view). When using the basic telescope, all objects in the sky will slowly drift out of the field of view unless you manually make corrections with the right ascension cable.
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Page 10: Using The Setting Circles
The right ascension setting circle does not move as the telescope moves in right ascension and thus it must by aligned each time you want to use it to find a new object. However, you do not need to use a bright star each time but you can use the object you are currently observing. - Page 11 15x to 140x. Higher powers are used mainly for lunar and planetary observing. C. Your telescope also can use an optional 2x Barlow Lens - 1¼”. The Barlow Lens doubles the power of any 1¼”...
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Page 12: Telescope Maintenance
7. Photography Your 80mm EQ can be used photographically as well as visually. To turn your telescope into a telephoto lens all you need is to use the built-in T-Adapter and a T-Ring designed for your particular camera make (i.e., Nikon, Minolta, Pentax, etc.). The T-Ring, which replaces the camera’s normal lens, threads onto the T-Adapter. -
Page 13: Specifications And Standard Accessories
F. Planisphere & Planet Guide (#93720) in various latitude ranges 30º (20 – 40º), 40º (30 – 50º), 50º (40 – 60º). G. Other accessories are available. See the Celestron Accessory Catalog (#93685) or ask your Celestron dealer for details. #21072... - Page 14 CELESTRON ONE YEAR LIMITED WARRANTY Celestron International (CI) warrants this telescope to be free from defects in materials and workmanship for one year from the date of purchase. CI will repair or replace such product or part thereof which, upon inspection by CI, is found to be defective in materials or workmanship.
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