Explore Scientific Truss Tube Dobsonian Telescopes User Manual Download Page 13

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Specifications

“ 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

“ 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 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...

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Summary of Contents for Truss Tube Dobsonian Telescopes

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