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User Manual
Explore Scientific Truss Tube Dobsonian Telescopes
DANGER!
DO NOT use this telescope or any accompanying finder scope to look at or near the Sun unless you are using a special
solar filter! Even momentary visual contact with the Sun's light rays can instantly cause irreversible damage to your
eye(s). Eye damage can be painless, so there is no warning to the observer that damage has occurred until it is too
late. Take extra care when using the telescope or a finder scope during daylight hours, and do not point either at or
near the Sun. Do not look through either when you are moving the instruments during the daytime. Never allow anyone
to use the telescope or a finder scope during the daytime without warning them of the hazards of aiming either at or
near the Sun. Make sure that they are adequately trained on the use of these instruments before allowing them to start
observing. Children should always have informed and trained adult supervision while observing.
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Summary of Contents for Explore Scientific Truss Tube Dobsonian Series
- Page 1 User Manual Explore Scientific Truss Tube Dobsonian Telescopes DANGER! DO NOT use this telescope or any accompanying finder scope to look at or near the Sun unless you are using a special solar filter! Even momentary visual contact with the Sun’s light rays can instantly cause irreversible damage to your eye(s).
- Page 2 Accessory Explore Scientific service All Explore Scientific telescopes and telescope accessories are subject to constant technical improvement. Minor changes of product specifications that happen during the improvement of the product are subject to change without notice. Please keep this manual for future reference and do not throw it away.
- Page 3 Revision Figure 1 Figure 1: Telescope parts overview 1. Focusser with 10:1 reduction Figure 2 Figure 3 2. Secondary cage unit with secondary mirror 3. Collimation-tool for the main mirror 4. Trusses 5. Altitude wheels The revision consists of the clutch and the 4mm 6.
- Page 5 Unboxing and checking contents Please Note: We recommend that you keep the original shipping box and packing materials if possible, in case your scope should ever need to be returned for service or warranty purposes. Inside the main package, you will find: Two yellow altitude wheels Rockerbox Red dot finder...
- Page 6 Figure After removing the trusses, you will find two boxes. The smaller one contains the mirror box and the other contains the rocker box. On the outer left you can see one of the altitude wheels, the stray light cover for the secondary cage is visible in the upper part of the box.
- Page 7 Inside the mirror box you will see a foam insert that contains some small parts, clutches, extension and the red dot finder. This foam insert also protects the main mirror during transit. It also gives you the opportunity to store/transport eyepieces or accessories.
- Page 8 move but not slip. To install, place the clutch with the tension pad facing the altitude wheel into the hole nearest the end of the box with the fans. Attach the clutch by screwing in the large thumb knobs until the tension pad presses firmly against the wheel. Figure 6 Now look at the mirror box from above.
- Page 9 1. Remove the eyepiece from the focuser and look through it. The secondary should appear round. If the secondary does not appear round, tilt it with the three collimation screws that are located on the back side of the secondary holder. 2.
- Page 10 Figure 11 Figure 8 Figure 10 Try turning the main mirror collimation screws – when you are turning the right screw in the right direction, you will notice that the distracting “tail” is getting shorter (figure 10): Remember to recenter the star after you have turned a screw. When the telescope is perfectly aligned, you will see the picture of figure 11 (when the air is perfect).
- Page 11 Using your Dobsonian Your Explore Scientific Dobsonian is a precision optical instrument and should be used with care. Try to avoid exposing your telescope to vibrations because this may cause the telescope to lose collimation. Aligning the viewfinder The red dot that is used by the finder scope is not readily visible during the day. For this reason you should align the finder scope once it is dark.
- Page 12 Astronomical observations The first observations should be performed during dusk so that you get familiar with your new telescope quickly. Always remember never to look at or near the sun! Choose a land object that is easy to find and far away, such as a mountain top. Roughly point the telescope at the object.
- Page 13 Tips and Tricks Marking with luminous paint: As noted above in the section about assembly it is very helpful to mark the positions of the altitude wheels and the trusses. This helps when assembling the telescope at night and keeps collimation issues at a minimum. We also recommend marking your screws with a patch of luminous paint because it makes finding lost parts a lot easier to find when dropped in the grass and often makes it unnecessary to use a flashlight, which would disturb the night vision of other observers.
- Page 14 Specifications 10“ Model Tube: Open truss design Upper tube ring: Metal tubing, incl. secondary spider and holder, plus focuser and truss connectors. Mirror box: with main mirror and cell, fans and truss connectors Trusses: Powder coated aluminum with connectors. Secondary spider: 4-arm, steel Main mirror: 10”...
- Page 15 Service and Maintenance Your Explore Scientific truss Dobsonian is a precision instrument that will provide many years of fun. When you are treating this telescope with the same care as for example a expensive camera, it is very unlikely that you will ever need to return it for service or maintenance.
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