Explore Scientific Truss Tube Dobsonian Series User Manual Download Page 15

 
 

Accessories: 

Explore Scientific has a large portfolio of accessories available for your telescope. For a complete overview of these accessories, 
visit 

www.explorescientific.com

 

 
If you have any question regarding this product, please do not hesitate to contact our Customer Service department at (866) 252-
3811 or [email protected]. In case of the unlikely event that your telescope needs service or repair at our facility, 
please contact one of our customer service representatives before sending anything back. The large majority of service issues 
can be dealt with on the phone without sending anything back to us.

 

 
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. 

 
Please note the following recommendations for maintaining your telescope: 

a)  Try to avoid cleaning the optics. A little dust on the optical system will not deteriorate the performance of the optical 

system by any noticeable amount. A little dust should not be a reason to clean the optics. 

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 contain fiberglass particles that can 
be abrasive.  

c)  Organic dirt (fingerprints etc.) can be removed from the optical surface with a mixture of 3 parts distilled water and one 

part pure isopropyl alcohol (99%). Only use soft, white, unscented, lotion-free tissues to wipe optics. Soak the mirror to 
dissolve the dirt and remove the fluid with short, cautious strokes. Remember to change tissues every few strokes.  

d)  While you are using your telescope during the night you will eventually have dew condensing on the surfaces. This will 

not cause any trouble – your telescope is designed to take a little moisture without problems. When you store the 
telescope, however, we recommend wiping the surfaces (except for the optics) with a dry cloth and giving the telescope 
some time to evaporate the water on the optics by putting the telescope into a dry room with the lid of the mirror box 
open. Wait until all water has dried off before storing the telescope. 

 

 Recycling 

 
Please dispose of the package properly. Please note that you have to consider the legal obligations when you want to recycle the 
telescope. You will get the actual recycling regulations from your local recycling agency or the ministry that issued the regulations. 
 
 

 

Summary of Contents for Truss Tube Dobsonian Series

Page 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...

Page 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...

Page 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...

Page 4: ......

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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