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(714) 556-2291 TABLE OF CONTENTS Introduction ' 3 Standard Equipment 3 Setting Up The Telescope 3 Telescope Operation: Your First Observations 5 Focusing 5 Magnification 6 The Viewfinder 6 Celestial Coordinates 6 Lining Up With The Celestial Pole 7 Latitude Ranges 9 High Latitudes Low Latitude Balance Weight Precise Polar Alignment 9 Electronic Motor Drive 10 Setting Circles 11 Observing with the Telescope 11 Telescope Maintenance 12 Basic Specifications: Model 2045 15 MEADE MODEL 2045:4" SCH MIDT-CASSEG RAI N TELESCOPE INTRODUCTION The Meade Model 2045 permits a very wide range of serious astronomical and terrestrial applications — and in an extremely compact and portable optical/mechanical package. The advanced Schmidt-Cassegrain mirror-lens ("catadioptric") optical design of the Model 2045 enables a 40" effective optical tube length to be compressed into an actual tube length only 10" long — and with no sacrifice whatsoever in the most demanding performance requirements. The capabilities of the instrument are essentially limited not only by the telescope, but by the acquired skills of the observer and photographer. Do take time to read this manual thoroughly so that you will be fully acquainted with the many important features of the telescope, as well as with the auxiliary equipment and accessories available for advanced applications. STANDARD EQUIPMENT • 4" Schmidt-Cassegrain optical tube assembly and fork mount with pulse motor drive system 1 Eyepiece — MA25mm 1-1/4” O.D. 1 eyepiece holder/diagonal prism assembly • 5x24mm viewfinder • 3 thread-in tripod legs (2 fixed length legs; 1 adjustable length leg) Dust covers (front and rear) Battery pack with cord • Hardware package SETTING UP THE TELESCOPE The basic Model 2045 telescope is shipped as a completely assembled instrument. After removing he telescope from its shipping carton and carrying case, familiarize yourself with the various controls and accessories (See Fig. 1). The eyepiece holder/diagonal prism threads directly onto the rear cell thread of the telescope and, in turn, accepts the supplied eyepiece. The 5x24 viewfinder attaches to the rear portion of the telescope with the supplied hardware (see (1), Fig. 1). For astronomical observations, the diagonal prism provides a comfortable right-angle viewing position. Note, however, that although the image appears correctly oriented up-and-down, it is reversed left-for-right. For terrestrial observations, where a fully-corrected image orientation (both up-and-down and left-for-right) is desirable, the optional #928 45* Erect-lmage Roof Prism and eye piece holder (1-1/4") should be ordered separately. The standard diagonal prism is also well-suited for many terrestrial observations. Eyepieces are held in place in the diagonal prism with a moderate tightening of the small thumbscrew. Fig. 1 — Meade Model 2045 (1) Viewfinder (2) Declination Lock (3) Declination Setting Circle (4) Motor Drive Base (5) Declination Slow-Motion Control (6) Adjustable Tripod Leg (7) Right Ascension Lock (8) Right Ascension Setting Circle (9) R.A. Slow-Motion Control (10) Tube Adapter (11) Eyepiece-Holder/Diagonal Prism (12) Eyepiece (13) Fixed-Length Tripod Leg (14) Tripod Adapter (Optional) 4 TELESCOPE OPERATION: YOUR FIRST OBSERVATIONS With the telescope standing upright on its drive base (i.e. without the 3 tripod legs attached), the eyepiece-holder/diagonal prism attached, and with the MA 25mm eyepiece inserted into the diagonal prism, you are ready to make observations through the telescope. WARNING! NEVER POINT THE TELESCOPE DIRECTLY AT OR NEAR THE SUN, OR ATTEMPT TO OBSERVE THE SUN, EITHER THROUGH THE MAIN TELESCOPE OR THE VIEWFINDER, WITHOUT A PROPER PROFESSIONAL QUALITY SOLAR FILTER! INSTANT AND IRREVERSIBLE INJURY TO YOUR EYE MAY OTHERWISE RESULT! By unlocking the R.A. lock (7), Fig. 1, the telecope may be turned rapidly through wide angles in Right Ascension (R.A.) The reason for the terminology "Right Ascension" and its complementary term “Declination" will be made clear further on in this manual. For now, "Right Ascension" simply means "horizontal" and "Declination” means "vertical." DO NOT ATTEMPT TO MOVE THE TELESCOPE MANUALLY IN A HORIZONTAL DIRECTION WHEN THE R.A. LOCK IS IN THE FULLY "LOCKED" POSITION, AS SUCH OPERATION MAY RESULT IN DAMAGE TO THE INTERNAL GEAR SYSTEM. Release the Declination lock (2), Fig. 1, by rotating the control lever in a counterclockwise direction. This permits sweeping the telescope through wide angles in Declination. DO NOT ATTEMPT TO MOVE THE TELESCOPE MANUALLY IN A VERTICAL DIRECTION WHEN THE DECLINATION LOCK IS IN THE "LOCKED" POSITION. To use the Declination fine-adjust, or slow-motion control, lock the telescope in Declination using the Declination lock (2) Fig. 1, and turn the Declination slow-motion knob (5), Fig. 1. NOTE THAT THIS DECLINATION SLOW-MOTION CONTROL HAS A FIXED TRAVEL LENGTH, LIMITED BY THE MOTION OF ...