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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.  
 

 

Содержание Truss Tube Dobsonian Series

Страница 1: ...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 m...

Страница 2: ...s and tricks Maintaining the optics Specifications Accessory Explore Scientific service All Explore Scientific telescopes and telescope accessories are subject to constant technical improvement Minor...

Страница 3: ...Extension 11 Clutch The revision consists of the clutch and the 4mm hex screw with the plastic sleeve The center rocker knob will be replaced with the hex screw and sleeve Figure 2 This will allow for...

Страница 4: ......

Страница 5: ...r box Stray light protection 8 Screws 4 short screws with knob to secure the secondary cage to the truss pairs 2 long screws with knob to secure the altitude wheels directly to the main mirror box its...

Страница 6: ...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 Remove all parts from the b...

Страница 7: ...are two sets of holes on both sides of the mirror box Having two sets gives you an additional degree of freedom to balance your telescope If you are just using lightweight eyepieces 1 25 we recommend...

Страница 8: ...time you will need a few minutes to get accustomed to the procedure since you have to hold the secondary cage with one hand and align the truss holes and the threaded hole of the secondary unit and i...

Страница 9: ...main mirror Practice this until you get a feel of what a turn at one of the collimation screws is doing Fine Collimation During fine collimation locate Polaris and view it with high magnification Note...

Страница 10: ...and show tails directed tot he edge of the field of view If you are using cheap eyepieces those star images will be even more distorted because the off axis aberrations of the telescope and the eyepi...

Страница 11: ...red dot finder and move your head until you see the red dot of light that is projected onto the glass window Adjust the finder with the two screws until the red dot is on top of the object that is cen...

Страница 12: ...turn Saturn has a diameter about nine times the Earth s diameter and appears as small roundish disc with a distinct set of rings that bulge out from the edges of the planetary disc Galileo who was the...

Страница 13: ...ins Always remember to bring warm clothing like thick jackets beanies gloves winter shoes and thick socks even if your were sweating during the day It is hard to enjoy even the best night when you are...

Страница 14: ...coated aluminum with connectors Secondary spider 4 arm steel Main mirror 12 305 mm parabolic BK 7 like glass aluminum coated with protective layer Focal length 1524 mm Focal ratio f 5 Resolving power...

Страница 15: ...b If cleaning the optics is necessary it is best to brush away the dust with a fine camel hair brush as it is used for photographic equipment Please do NOT use optical lens cleaning tissues as many c...

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