background image

 
Inside  the  mirror  box  you  will  see  a  foam  insert  that  contains  some  small  parts  and  the  red  dot  finder.  This  foam  insert  also 
serves  as  a  transport  securing  device  for  the  main  mirror.  It  also  gives  you  the  opportunity  to  store/transport  eyepieces  or 
accessories. Remove the insert and  also remove the  protective  paper from the main mirror.  Please keep the protective  paper 
and try to avoid the contamination with dirt 

– the soft paper is the ideal  protection against dust without giving off fluff. 

In the other box there is the secondary cage unit and the rocker box (See figure 5): 

 

Figure

 5 

Take both parts out of the box and carefully remove the protective paper from the secondary mirror. 

 

Contents

 

Two yellow altitude wheels 
Rockerbox 
Red dot finder 
Secondary cage with finder bracket and 2“ focuser with reduction (10:1) 
4 Pairs of trusses 
Collimating tool for the main mirror 
Main mirror box 
Stray light protection 
12 Screws: 
4 short screws with knob to secure the secondary cage to the truss pairs 
4 long screws with knob to secure the altitude wheels directly to the main mirror box itself 
2 long thinner screws with knob to connect the altitude wheels to the lid of the main mirror box 
 

Assembly 

If  you  are  assembling  your  telescope  for  the  first  time  you  should  try  it  inside  the  warm  room first.  This  also  prevents  screws 
from vanishing in the grass when they fall down.  
Place the mirror box onto a table in front of yourself. We recommend to attach the altitude wheels to the mirror box first. You will 
notice  that  each  altitude  wheel  has  three  holes.  Two  of  the  holes  match  the  threaded  holes  on  the  mirror  box,  the  third  hole 
matches the threaded hole in the lid of the mirror box. 
Important:  You  have  four  possibilities  to  attach  the  altitude  wheel  onto  the  mirror  box  of  the  telescope.  There  are  two  sets  of 
holes on both sides of the mirror box. The idea behind this is, that this gives you a additional degree of freedom to balance your 
telescope. If you are just using lightweight eyepieces (1,25”) we recommend you to attach the altitude wheels to the lower set of 
holes. If you are using a coma corrector, heavy eyepieces or both we recommend you to use the upper set of holes.   Though 
the  distance  of  the  holes  in  the  altitude  wheels  appears  to  be  similar,  the  orientation  of  the  wheels  on  the  mirror  box  DOES 
matter 

– holes will not align if the altitude wheels are mounted in the wrong orientation. We recommend to mark the position of 

the altitude wheels so that everything works on the first try next time you assemble the telescope. I prefer luminescent color 

– 

this enables me to assemble the telescope in complete darkness so that my eyes can adapt to the night sky faster. Luminous 
color or luminous stickers are available from model making sources. 

Summary of Contents for Truss Tube Dobsonian Telescopes

Page 1: ...and it is very often painless you will react too slow and the permanent eye damage will already have taken place Never point your telescope or the finder scope at or near the sun Never look though yo...

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: ...scope parts overview 1 Focusser with 10 1 reduction 2 Secondary cage unit with secondary mirror 3 Collimation tool for the main mirror 4 Trusses 5 Altitude wheels 6 Rockerbox 7 Lid mirror box 8 Mirror...

Page 4: ...gure 2 Figure 2 The trusses are already assembled in four pairs At the bottom of the picture you will notice the collimation tool that will help you collimating the main mirror of the telescope Carefu...

Page 5: ...that contains the rocker box to the right 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...

Page 6: ...e the warm room first This also prevents screws from vanishing in the grass when they fall down Place the mirror box onto a table in front of yourself We recommend to attach the altitude wheels to the...

Page 7: ...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 insert the screw with the other hand If you are doing...

Page 8: ...ndary does not appear round tilt it with the three collimation screws that are located on the back side of the secondary holder 2 Next check the reflection of the middle point of the main mirror in th...

Page 9: ...10 Figure 11 Figure 9 Try turning the main mirror collimation screws when you are turning the right screw in the right direction you will notice that the comatic tail is getting shorter figure 10 Reme...

Page 10: ...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 centered in the telescopes eyep...

Page 11: ...e lines are cloud bands in the atmosphere of Jupiter Even with low magnification 4 of the 67 moons of Jupiter are visible the so called Galilean moons Io Ganymed Europa and Callisto Because those moon...

Page 12: ...the meridian so that they are on their highest position possible If the image is dim or moving fast use a smaller magnification Using too much magnification is a mistake that is made very often by beg...

Page 13: ...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 14: ...ack sky As a consequence the contrast and the visibility of deep sky objects are seriously affected Depending on the nature of the celestial object your can block some of the unwanted light and thus e...

Page 15: ...llen is consumed by bacteria that will return the favor in form of acid excretion which will damage the coating c Organic dirt fingerprints etc can be removed from the optical surface with a mixture o...

Page 16: ...e void of the warranty you will get free offer about the repair costs Important shipping information Please try to avoid damage during transport by using the original boxes Please do not forget to add...

Reviews: