Operating Instructions AR-90 · AR-102 · AR-127S/L · AR-152S/L· NT-130 · NT-150S/L · NT-203
General InformatIons / telescope features G f e H I J 1# d 1$ C B 1# 1) 1! Fig. 1a: The Messier series telescope including a viewfinder. Optical Assembly (Newtonian model shown). d B 1^ f e 3( H g 1% C I 3& 3* 3^ Fig. 1c: The Exos1 Tripod 3& 3% AR = Achromatic Refractor - NT = Newton - Reflectortelescope Technical Data Page 23! 3^ 3* Fig.
General Informations / Telescope Features 1& 1* 1( 3#3$ 3) 3! 2! 2( 2* 2$ 2@ 2^ 2& 2# 1* 1( 2! 2# 2@ 2^ 2& 1& 3) 3@ 3$ 3! 2( 2* 2^ Fig. 1d, top: The Messier series mount EXOS2 Fig. 1d, left: The Messier series mount EXOS1 Explanations of the points see page 5 ff WARNING! Never use a Messier-Series Telescope to look at the Sun! Looking at or near the Sun will cause instant and irreversible damage to your eye.
Index Chapter Page Messier series: Your personal window to the universe �������������������������������������������������������� 5 Description of the features ������������������������������������������������������� 5 Assembling (Exos 1) Telescope Assembly ����������������������������������������������������������� 8 How to Assemble Your Telescope ������������������������������������� 8 Assembling (Exos 2) Telescope Assembly ��������������������������������������������������������� 11 How to Assemble
Telescope Features Messier series: Your personal window to the universe The Messier series models are versatile, high-resolution telescopes. The Messier series models offer unmatched mechanical performance. The Messier series telescopes reveal nature in an ever-expanding level of detail. Observe the feather structure of an eagle from 150 yards or study the rings of the planet Saturn from a distance of 800 million miles.
Telescope Features 1& Important: Before loosening the DEC lock, hold the optical tube in place; otherwise it might swing through and cause damage to the mount or even hurt the operator. 2& Want to learn more about adjusting the latitude scale? See p. 15, step 6. 2( Want to learn more about the polar finder? See p. 30. DEFINITION: In this manual, you will find the terms “right aszension (RA), Declination (DEC), Elevation and Azimut”. These terms are explained on p. 25 6 the focuser assembly.
Telescope Features Messier Tips Surf the Web One of the most exciting resources for astronomy is the internet. The internet is full of websites with new images, discoveries, and the latest astronomical information.For example, when comet Hale-Bopp made its approach to our Sun in 1998,astronomers around the world posted new photos daily. You can find websites for almost any topic relating to astronomy on the internet.
Assembling Exos1 Assembling (Exos1) Telescope Assembly As you unpack your telescope, carefully note the following parts. The assembly is shipped in separate boxes. • Equatorial mount with polar alignment finder • Heavy duty, adjustable steel tube tripod with leg braces, three tripod leg lock knobs, and a captive mount locking knob • Complete optical tube assembly including primary mirror with dust cover and a rack-and-pinion focuser and eyepiece holders for both 1.
Assembling Exos1 5. Fastening the counterweight on the counterweight rod: insert the base of the counterweight rod (20, illustration 1d) on the threaded end of the rod and screw it on the counterweight rod (22, illustration 1). Then screw both in the thread on the base of the declination axis and counter screw rod to base. If you look through the large drill hole in the counterweight you will see the bolt blocking the hole.
Assembling Exos1 Fig. 9b: The finder scope assembly has a dovetail bracket, that fits the holder that is mounted on the optical tube. Eyepiece NT Viewfinder Holder Thumbscrew Fig. 10a: Insert eyepiece intor holder and tighten thumbscrews. Eyepiece AR Thumbscrews Viewfinder Diagonal prism 9. Attach viewfinder bracket (Abb. 9b). Locate the viewfinder bracket screws (15, Fig. 1b and Fig. 9a) and remove the nuts from the screws.
assemblInG exos2 Assembling (Exos2) Telescope Assembly As you unpack your telescope, carefully note the following parts. The assembly is shipped in separate boxes. • Equatorial mount with polar alignment finder • Heavy duty, adjustable steel tube tripod with leg braces, three tripod leg lock knobs, and a captive mount locking knob • Complete optical tube assembly including primary mirror with dust cover and a rack-and-pinion focuser and eyepiece holders for both 1.
Assembling Exos2 it disappear in its drill hole and reveal the hole. If it doesn‘t, carefully loosen the counterweight screw until the bolt moves. Remove the safety cover (23, illustration 1d) from the rod. Hold the counterweight firmly whilst moving it to about the middle of the counterweight rod (22, illustration 1d). Tighten the counterweight fastening screw and then replace the safety cover.
First Steps Eyepiece NT Viewfinder Holder Thumbscrew Fig. 10a: Insert eyepiece intor holder and tighten thumbscrews. Eyepiece AR Thumbscrews Viewfinder Diagonal prism Holder Fig. 10b: Insert eyepiece into diagonal prism and tighten thumbscrews. Leg lock knob Fig. 11: Adjust the tripod height using the leg lock knobs. 13 NOTE: Two eyepiece holders are included with your EXOS2-NT-telescope - for both 1.25” and 2” eyepieces.
First Steps Aligning the Viewfinder Isolation pad Typ 2x LR 44 The wide field of view of the telescope‘s viewfinder (4, Fig. 1a) provides an easier way to initially sight objects than the main telescope‘s eyepiece (3, Fig. 1a), which has a much narrower field of view. If you have not already attached the viewfinder to the telescope tube assembly, follow the procedure described in step 9, page 9.
First Steps Collimation screws Eyepiece ATTENTION: Never point the telescope directly at or near the Sun at any time! Observing the Sun, even for the smallest fraction of a second, will result in instant and irreversible eye damage, as well as physical damage to the telescope itself. 6. Check this alignment on a celestial object, such as a bright star or the Moon, and make any necessary refinements, using the method outlined above in steps 3 and 4.
First Steps A telescope’s eyepiece magnifies the image formed by the telescope’s main optics. Each eyepiece has a focal length, expressed in millimeters, or “mm.” The smaller the focal length, the higher the magnification. For example, an eyepiece with a focal length of 9mm has a higher magnification than an eyepiece with a focal length of 25mm. Your telescope comes supplied with a Plössl 25mm eyepiece which gives a wide, comfortable field of view with high image resolution. Fig.
Observation Observation Important Note: Objects appear upside-down and reversed left-for-right when observed in the viewfinder. With refracting telescope models, objects viewed through the main telescope with the diagonal mirror in place are seen right-sideup, but reversed left-for-right. This image inversion is of no consequence when observing astronomical objects, and in fact all astronomical telescopes yield inverted images.
observatIon Setting the Polar Home Position North Point optical tube to north The tripod leg is to be aligned north under the counterweight rod Level mount Point leg marked with star to north Fig. 16a: The polar home position, side view. 1. Level the mount, if necessary, by adjusting the length of the three tripod legs. 2. Unlock the R.A. Lock (33, Fig. 1d). Rotate the Optical Tube Assembly until the counterweight shaft is pointing straight down over the mount. See Figs. 16a and 16b. 3.
Maintenance and Service Maintenance Messier series telescopes are precision optical instruments designed to yield a lifetime of rewarding applications. Given the care and respect due any precision instrument, your Messier will rarely, if ever, require factory servicing. Maintenance guidelines include: a.
Maintenance and Service Alignment (Collimation) of the Newtonian Optical System Note: The AR-(refractor) models do not need any collimation All Bresser Newtonian telescopes are precisely collimated at the factory before packing and shipment, and it is probable that you will not need to make any optical adjustments before making observations. However, if the telescope sustained rough handling in shipment, you may need to re- collimate the optical system.
Maintenance and Service IMPORTANT NOTE: Do not force the 4 screws past their normal travel, and do not rotate any screw or screws more than 2 full turns in a counterclockwise direction (i.e., not more than 2 full turns in their „loosening“ direction), or else the diagonal mirror may become loosened from its support. Note that the diagonal mirror collimation adjustments are very sensitive: generally turning a collimation screw 1/2-turn will have a dramatic effect on collimation. 3.
Maintenance and Service Customer Service NOTE: The production registration form is on page 42. Please fill it out and return it to Meade Instruments Europe. This is a condition of our original guarantee. If you have a question concerning your Messier series telescope, contact the Messier Customer Service Department. In the improbable case of a malfunction, please contact first the Bresser customer service before sending back the telescope.
technIcal data AR-102 Achromatic refractor with EXOS 2 item number Optical design Clear aperture Focal length Focal ratio Resolving power Coatings Mount EXOS2 RA + DEC drive system Max. practicle power Tripod Net weight 47-02108 achromatic refractor 4” = 102 mm 1000 mm f/10 1.11 arc sec multi coated Aluminium-Guß, German type equatorial flexible shafts 200x adjustable steel-tube field tripod 18.
technIcal data NT-150 S/L Newtonian reflector with EXOS 2 item number Optical design Clear aperture Focal length Focal ratio Resolving power Mount EXOS 2 RA + DEC drive system Max. practical power Tripod Net weight 47-50758 / 47-50128 Newtonian reflector 6” = 150 mm 750mm / 1200 mm f/5 or f/8 0.76 arc sec Aluminium-Guß, German type equatorial flexible shafts 300x adjustable steel-tube field tripod 20,8 or 22.
Appendix A: Celestial coordinates Appendix A: Celestial coordinates For a sufficient tracking of an celestial object, the telescope mount has to be aligned with the celestial pole. By doing this, the mount’s axes are orientated in this way that they fit to the celesial sphere. If you want to align the telescope’s mount to the celestial pole, you need some knowledge in which way an object at the sky can be located while it is steadily moving across the sphere.
Appendix A: Celestial coordinates Every celestial object can be exactly determined by these coordinates. Using setting circles prerequisites an advanced observing technique. If you use them for the first time, first point a bright star (the guide star) with known coordinates and adjust the setting circles to them. Now you can do a “star hop” to the next star with known coorditates and compare the setting circles with them.
Appendix A: Celestial coordinates Messier Tips Join an Astronomy Club. Attend a Star Party One of the best ways to increase your knowledge of astronomy is to join an astronomy club. Check your local newspaper, school, library, or telescope dealer/store to find out if there’s a club in your area. At club meetings, you will meet other astronomy and Meade enthusiasts with whom you will be able to share your discoveries.
Appendix B: Latitude Chart Appendix B: Latitude Chart Latitude Chart for Major Cities of the World To aid in the polar alignment procedure (see page 25), latitudes of major cities around the world are listed below. To determine the latitude of an observing site not listed on the chart, locate the city closest to your site. Then follow the procedure below: Northern hemisphere observers (N): If the site is over 70 miles (110 km) north of the listed city, add one degree for every 70 miles.
Appendix B: Latitude Chart UNITED STATES OF AMERICA City Albuquerque Anchorage Atlanta Boston Chicago Cleveland Dallas Denver Detroit Honolulu Jackson Kansas City Las Vegas Little Rock Los Angeles Miami Milwaukee Nashville New Orleans New York Oklahoma City Philadelphia Phoenix Portland Richmond Salt Lake City San Antonio San Diego San Francisco Seattle Washington Wichita SOUTH AMERICA City Asuncion Brasilia Buenos Aires Montevideo Santiago ASIA City Peking Seoul Taipei Tokio Victoria AFRICA City Kai
Appendix C: Polar Alignment Reticle LED knob 3) Eyepiece Fig. 35: The polar alignment viewfinder* Appendix C: Polar Alignment The Polar Alignment Viewfinder Normally, a rough alignment with the celestial pole is sufficient for visual purposes. However, for those observers who need to meet the more demanding requirements of astrophotography, the polar alignment viewfinder allows the telescope mount to be more precisely aligned with true North.
Appendix C: Polar Alignment Observers on the northern hemishere: 3) N- 7 a) Determine the rough longitude of your observing site (example: Munich is 12° E). Now determine the longitude of the time meridian according to your local time. For the central european time, this is 15° E (do not use daylight savings). Calculate the difference between both longitudes; in our exampel with Munich, it is 3° N- 7 b) Now set the secondary scale at your month ring (E 20 10...) to this difference.
Appendix D: Basic astronomy Appendix D: Basic astronomy Fig. 42: The moon. Note the deep shadows in the craters. Fig. 43: The giant planet, Jupiter. The four largest moons can be observed in a different position every night. In the early 17th century Italian Scientist Galileo, using a telescope smaller than your Messier, turned it skyward instead of looking at the distant trees and mountains.
Appendix D: Basic astronomy Twelve Apollo astronauts left their bootprints on the Moon in the late 1960‘s and early 1970‘s. However, no telescope on Earth is able to see these footprints or any other artifacts. In fact, the smallest lunar features that may be seen with the largest telescope on Earth are about one-half mile across. Planets Fig. 44: Saturn with its ring system. Planets change positions in the sky as they orbit around the Sun.
Appendix D: Basic astronomy Difficult to imagine stellar distances? Learn more on p. 36 Constellations are large, imaginary patterns of stars believed by ancient civilizations to be the celestial equivalent of objects, animals, people, or gods. These patterns are too large to be seen through a telescope. To learn the constellations, start with an easy grouping of stars, such as the Big Dipper in Ursa Major. Then, use a star chart to explore across the sky.
Appendix D: Basic astronomy Fig. 47: The Andromeda Galaxy (M31), the biggest one in our local group. Fig. 48 Messier-Tipps Star Charts Star charts and planisphere are very useful tools and are great aids in planning a night of celestial viewing. A wide variety of star charts are available in books, in magazines, on the internet and on CD Roms. For all Messier telscopes the star chart software „Cartes du Ciel“ is included with your purchase.
Appendix D: Basic astronomy Distances in space Distance between Earth and Moon 383.000 km / 240’000 mi Earth Moon Diameter = 12’664 km Diameter = 3’456 km Distance between Planets Sun The distance between the Sun and our Earth is 150’000’000 km / 93’750’000 mi or 1 AU (Astronomical unit) Mercury Venus Distance to the sun = 0.39 AU Earth Distance to the sun = 0.72 AU Mars Distance to the sun = 1.00 AU Distance to the sun = 1.
Appendix E: Star maps Winter W O Fig. 50: Sky view (Beginning of January, ca. 22 h), Facing south S O W Fig. 50a: Sky view in winter (Beginning of
Appendix E: Star maps Spring O Fig. 51: Sky view in spring (Beginning of April, ca. 22 h), facing south W S W Abb. 51a: Sky view in spring (Beginning of April, ca.
Appendix E: Star maps Summer W O Fig. 52: Sky view in summer (Beginning of July, ca. 22 h), facing south S O W 39 Fig. 52a: Sky view in summer (Beginning of July ca.
Appendix E: Star maps Autumn O Fig. 53: Sky view in autumn (Beginning of October, ca. 22 h), facing south W S W Fig. 53a: Sky view in autumn (Beginning of October, ca.
Meade Instruments Europe GmbH & Co. KG Gutenbergstraße 2 • DE-46414 Rhede Telefon: (0 28 72) 80 74 0 service.apd@bresser.de • www.bresser.de ANLMESSIERGB1212BRESSER © 2013 Meade Instruments Europe. No part of this manual may be reproduced, sent, transferred or be translated into another language in any form without written permission of the Meade Instruments Europe GmbH & CO. KG. Errors and technical changes excepted.
