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Summary of Contents for FirstScope 21024

Page 1: ...F Fi ir rs st tS Sc co op pe e I In ns st tr ru uc ct ti io on n M Ma an nu ua al l M Mo od de el l 2 21 10 02 24 4...

Page 2: ...General Observing Hints 7 The Celestial Coordinate System 8 Motion of the Stars 9 CELESTIAL OBSERVING 10 Observing the Moon 10 Lunar Observing Hints 10 Observing the Planets 10 Observing Deep Sky Obje...

Page 3: ...and easy set up Take time to read through this manual before embarking on your journey through the Universe It may take a few observing sessions to become familiar with your telescope so you should ke...

Page 4: ...4 Figure 1 1 1 Focuser 6 Arm 2 Secondary Diagonal Mirror inside 7 Tube End 3 Optical Tube 8 Primary Mirror inside 4 Lock Nut 9 Focus Knob 5 Base 10 Eyepiece 10 9 8 7 6 5 4 3 2 1...

Page 5: ...er see the section on Calculating Magnification The eyepiece fits directly into the focuser To attach the eyepieces 1 Make sure the thumbscrews are not protruding into the focuser tube Then insert the...

Page 6: ...ll enjoy a telescope that is relatively compact and portable A Newtonian Reflector telescope offers such impressive light gathering characteristics you can take a serious interest in deep space astron...

Page 7: ...t you are observing To calculate the actual field of view divide the apparent field of the eyepiece supplied by the eyepiece manufacturer by the magnification In equation format the formula looks like...

Page 8: ...rth and separates the northern celestial hemisphere from the southern Like the Earth s equator it bears a reading of zero degrees On Earth this would be latitude However in the sky this is referred to...

Page 9: ...use the sunlight during the day washes out the starlight However part of this circular motion of stars in this region of the sky can be seen by setting up a camera on a tripod and opening the shutter...

Page 10: ...see the moons of Jupiter as they orbit the giant planet Saturn with its beautiful rings is easily visible at moderate power Planetary Observing Hints y Remember that atmospheric conditions are usually...

Page 11: ...than you can with the naked eye y Binoculars a helpful tool in locating bright stars and searching an area you are looking for objects in Can be a substitute or supplement to a finderscope y Books sev...

Page 12: ...necting the two stars 6 Look through the telescope and the Ring Nebula should be in your field of view The Ring Nebula s angular size is quite small and difficult to see 7 Because the Ring Nebula is r...

Page 13: ...ound around major urban areas LPR filters enhance deep sky viewing from light polluted areas by blocking unwanted light while transmitting light from certain deep sky objects You can on the other hand...

Page 14: ...ted If moisture condenses on the inside of the optics remove the accessories from the telescope Place the telescope in a dust free environment and point it down This will remove the moisture from the...

Page 15: ...osed on the primary mirror Figure 6 2 If the primary mirror is not centered in the secondary mirror adjust the secondary mirror screws by alternately tightening and loosening them until the mirror is...

Page 16: ...Length 300mm Focal Ratio f 4 Optical Coatings Coated Eyepieces 1 25 Barrel 20mm 15x 4mm 75x Apparent FOV 20mm 25 and 4mm 33 Angular Field of View w 20mm eyepiece 1 7 Linear FOV w 20mm ft 1000yds m 10...

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