Explore Scientific Truss Tube Dobsonian Series User Manual Download 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” (254 mm), parabolic, BK-7 like glass, aluminum coated with protective layer,  

Focal length

: 1270 mm 

Focal ratio

: f/5 

Resolving power

: 0,51 arc seconds 

Visual limiting magnitude

: approx.14.5 mag 

Focuser

: 2" rack and pinion 1:10, aluminum, with 1,25” reducer. 

Mount

: Dobson 

Finder

: Deluxe red dot finder 

Tube weight

: 20,2 kg. 

Rocker box weight

: 6,7 kg. 

Total weight

: 26,4kg 

 

12“ 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

: 12” (305 mm), ), parabolic, BK-7 like glass, aluminum coated with protective layer, 

Focal length

: 1524 mm 

Focal ratio

: f/5 

Resolving power

: 0,43 arc seconds 

Visual limiting magnitude

: approx.14.5 mag 

Focuser

: 2" rack and pinion 1:10, aluminum, with 1,25” reducer. 

Mount

: Dobson 

Finder

: Deluxe red dot finder 

Tube weight

: 22,9 kg. 

Rocker box weight

: 7,1 kg. 

Total weight

: 30 kg 

 

16" 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

: 16” (406 mm), ), parabolic, BK-7 like glass, aluminum coated with protective layer, 

Focal length

: 1825 mm 

Focal ratio

: f/4,5 

Resolving power

: 0,32 arc seconds

  

Visual limiting magnitude

: approx.16 mag 

Focuser

: 2" rack and pinion 1:10, aluminum, with 1,25” reducer. 

Mount

: Dobson 

Finder

: Deluxe red dot finder 

Tube weight

: 30 kg. 

Rocker box weight

 10 kg. 

Total weight

: 40 kg 

 

 

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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