Coleman CDB1145EQ1 Instruction & Owner'S Manual Download

Page: 1 / 28

Please retain the packaging and instructions for further reference, as they contain important information.

CDB1145EQ1

Summary of Contents for CDB1145EQ1

Page 1: ...Please retain the packaging and instructions for further reference as they contain important information CDB1145EQ1 ...

Page 2: ...escope has been designed for both a beginner and advanced star gazer It provides views of the moon and planets as well as dozens of galaxies star clusters and nebulae As a terrestrial land telescope the CDB1145EQ1 brings the world s natural wonders closer It delivers superb scenic views and allows for observation of animals and landscapes from a distance To obtain the best performance from your te...

Page 3: ...ket E 6x30 Finderscope F Finderscope Alignment Screws G Eyepieces K10 K25 Eyepiece cases 2 H Focus Knob I Piggyback Bracket J Telescope Main Tube K Primary Mirror Position 1 Dec Flexible Control Cable 2 R A Flexible Control Cable 3 Altitude Adjustment T bolt 4 Azimuth Lock Knob 5 Counterweight 6 Counterweight Locking Thumb Screw 7 Counterweight Rod 8 R A Scale 9 Dec Scale 10 Dec Lock Knob 11 Tube ...

Page 4: ...gure 1 1 Slowly loosen the height adjustment clamp and gently pull out the lower section of each tripod leg Tighten the screws to hold the legs in place see Figure 1 2 Spread the tripod legs apart to stand the tripod upright 3 Adjust the height of each tripod leg until the tripod head is properly leveled Note that the tripod legs may not be at same length when the equatorial mount is level B ATTAC...

Page 5: ... Figures 3 1 through 3 5 Follow the diagrams to place the mount into an upright position 4 AttachingtheEQ1MounttotheTripodLegs Position the EQ1 mount assembly collar in between the tripod legs as shown in Figure 4 Secure in place with the included bolts and wing nuts ...

Page 6: ...ace 6 Installing the Control Cables see Figure 5 A Locate the control cables The control cables have two different lengths Although you can mount either cable to each directional axis it is recommended that you mount the longer cable to the declination axis and the shorter cable to the right ascension axis setting circle B To install the control cables slide the sleeve end of the cable over the ni...

Page 7: ...A Remove the telescope tube from the box B Find the center of balance of the telescope tube Place this point between the two tube rings Close the hinges around the telescope and fasten securely by tightening the thumb nuts DO NOT OVER TIGHTEN FINDERSCOPE ASSEMBLY 1 ATTACHING THE FINDERSCOPE see Figure 8 A Locate the finderscope optical assembly B Remove the two knurled thumbscrews near the front o...

Page 8: ...s holder can now be turned in and out to focus When focus is reached lock it in position with the locking ring Figure 9 2 A Choose a distant object that is at least 500 yards away and point the main telescope at the object Adjust the telescope so that the object is in the center of the view in your eyepiece B Check the finderscope to see if the object centered in the main telescope view is centere...

Page 9: ... mount Fig 11 C Tighten the Dec lock knob D Move the counterweight along the counterweight rod until the telescope is balanced and remains stationary when released E Tighten the counterweight thumb screw to hold the counterweight in its new position 2 DEC Balancing All accessories should be attached to the telescope before balancing around the declination axis The R A balancing should be done befo...

Page 10: ...knob and rotate the mount head around the azimuth axis Use the altitude adjustment T bolts for altitude adjustments Fig 12 In addition this mount has Right Ascension hour angle and declination direction controls for polar aligned astronomical observing Loosen the lock knobs to make large direction changes Use the control cables for fine adjustment after the lock knobs have both been locked Fig d1 ...

Page 11: ... when placed in front of the diagonal In addition to increasing magnification the benefits of using a Barlow lens include improved eye relief and reduced spherical aberration in the eyepiece For this reason a Barlow plus a lens often outperform a single lens producing the same magnification However its greatest value may be that a Barlow can potentially double the number of eyepiece in your collec...

Page 12: ...map road maps are good for this purpose Now look at the side of your mount head there you will see a scale running from 0 90 degrees Unlock the hinge of the mount by gently pulling on the lock lever counter clockwise At the bottom of the head is a screw that pushes on a tongue under the hinge changing the angle Spin this until your latitude is shown on the scale by the indicator pin then lock the ...

Page 13: ...Hemisphere you must align the mount to the SCP by locating it s position with star patterns without the convenience of a nearby bright star The closest star is the faint 5 5 mag Sigma Octanis which is about one degree away Two sets of pointers which help to locate the SCP are alpha and beta Crucis in the Southern Cross and a pointer running at a right angle to a line connecting alpha and beta Cent...

Page 14: ...rom 1 through 24 with small lines in between representing 10 minute increments The upper set of numbers apply to viewing in the Northern Hemisphere while the numbers below them apply to viewing in the Southern Hemisphere Fig 18 Setting calibrating the R A setting circle In order to set your Right Ascension circle you must first find a star in your field of view with known coordinates A good one wo...

Page 15: ...gned POINTING YOUR TELESCOPE A German Equatorial mount has an adjustment sometimes called a wedge which tilts the mount s polar axis so that it points at the appropriate Celestial Pole NCP or SCP Once the mount has been polar aligned it needs to be rotated around only the polar axis to keep an object centered Do not reposition the mount base or change the latitude setting The mount has already bee...

Page 16: ... axis counter clockwise Fig 20 1 or clockwise Fig 20 3 Pointing toward the western or eastern horizon Now consider pointing the telescope to the western Fig 21 1 or eastern Fig 21 2 horizon If the counterweight is pointing North the telescope can be swiveled from one horizon to the other around the Dec axis in an arc that passes through the NCP any Dec arc will pass through the NCP if the mount is...

Page 17: ...d of a finderscope by loosening both the R A and Dec locks and swiveling the mount around both axes until the object is centered in the eyepiece field The swiveling is best done by placing one hand on the optical tube and the other on the counter weight bar so that the movement around both axes is smooth and no extra lateral force is applied to the axis bearings When the object is centered make su...

Page 18: ...d of the optical tube bumps into the mount s legs Fig q1 To adapt for this the optical tube can be very carefully slipped up inside the tube rings Fig q2 This can be done safely because the tube is pointing almost vertically and therefore moving it does not cause a Dec balance problem It is very important to move the tube back to the Dec balanced position before observing other sky areas Something...

Page 19: ... from the ground house buildings etc Your telescope may be able to give very high magnification but what you end up magnifying is all the turbulence between the telescope and the subject A good rule of thumb is that the usable magnification of a telescope is about 2X per mm of aperture under good conditions 6 Calculating the field of View The size of the view that you see through your telescope is...

Page 20: ...he amount of water vapour and particulate material in the air When you observe the Moon and the planets and they appear as though water is running over them you probably have bad seeing because you are observing through turbulent air In conditions of good seeing the stars appear steady without twinkling when you look at them with unassisted eyes without a telescope Ideal transparency is when the s...

Page 21: ...ial mount use this time for polar alignment 5 Adapting your eyes Do not expose your eyes to anything except red light for 30 minutes prior to observing This allows your pupils to expand to their maximum diameter and build up the levels of optical pigments which are rapidly lost if exposed to bright light It is important to observe with both eyes open This avoids fatigue at the eyepiece If you find...

Page 22: ...eful planning to actually see one of the moons disappear either in front of or behind Jupiter as it orbits around the planet Another great feature of Jupiter is its cloud belt Jupiter is alive with weather activity and its clouds have formed over time into belts visible through telescopes in the right atmospheric conditions Saturn the second largest planet is not as bright as Jupiter and so its mo...

Page 23: ... to observe 5 Begin your viewing session by using only the S20 eyepiece It will give you the widest angle and the brightest sharpest views Adjust the angle and position of the telescope as outlined in the previous sections 6 When possible avoid sudden temperature changes as the moisture in the air will condense on the mirrors and eyepiece lenses Should this occur after bringing your telescope indo...

Page 24: ...h gray lid Drill or punch a small pinhole in the exact center of the lid and cut off the bottom of the canister This device will keep your eye centered of the focuser tube Insert the collimating cap into the focuser in place of a regular eyepiece Collimation is a painless process and works like this Pull off the lens cap which covers the front of the telescope and look down the optical tube At the...

Page 25: ...n one and then compensate for the slack by tightening the other two Stop when you see all three mirror clips Fig 29 Make sure that all three small alignment screws are tightened to secure the secondary mirror in place Aligning the primary mirror Find the three locking screws at the back of your telescope and loosen them by a few turns If you see 3 large nuts protruding from the back of your telesc...

Page 26: ...only now it will be illuminated by starlight If necessary repeat the collimating process only keep the star centered while tweaking the mirror CARE AND CLEANING OF THE OPTICS 1 The optical components of a telescope will get dirty over time Dirt or dust on a lens should be removed with the utmost care A considerable amount of dirt or dust would have to accumulate on the optical surface before your ...

Page 27: ...fter searching for an object to view it is very likely that you are using an eyepiece that is too powerful To solve this problem always start with the lowest power eyepiece at first and only insert the higher power eyepiece after you have located an object 3 When I use my high power eyepiece everything looks much darker Why As magnification in a telescope increases brightness diminishes Conversely...

Page 28: ...28 Made in China ...

Search results

Summary of Contents for CDB1145EQ1

Reviews:

Related manuals for CDB1145EQ1

Brands by name

Popular brands

Coleman CDB1145EQ1, Instruction & Owner'S Manual

Search results

Summary of Contents for CDB1145EQ1

Reviews:

Related manuals for CDB1145EQ1

Brands by name

Popular brands