| GSO Imaging Newtonian Telescopes |
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GSO 8inch F/4 Imaging Newtonian Telescope with EXOS-II GoTo System
D=200mm / F=800mm F/4 Astrophotography Telescope | MADE IN TAIWAN (OTA) |
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1,02,000 + 18% GST |
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8" f/4 Imaging Newtonian telescope - for astro photography and rich field observation |
- fast and diffraction limited reflector system (f/4)
- high definition parabolical primary mirror, better than typical Chinese mirrors
- bright image by forced 94% mirror coatings
- good field illumination by 70mm secondary mirror
- robust mechanical system, no tilting/bending even under heavy camera load
- improved Monorail focuser with 1:10 dual speed transmission - more stability compared with Crayford designs
- ideal for travelling: tube length only 58 cm, weight only 6 kgs with rings and finderscope.
- GSO 8" f/4 Newtonian telescope is a strongly recommanded combination for astro photography as well as visual observing. We also offer high quality coma correctors for this fast imaging newtonian telescope.
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| Fast and Precision Optics |
The precisely figured 8" f/4 primary mirror is made from BK7 optical glass for enhanced thermal stability. BK7 is far superior in thermal characteristics to soda lime float glass - the glass used in consumer products like cookware - that's used in many reflectors in this price range. The mirror is coated with enhanced aluminum to at least 92% reflectivity and coated with a protective layer of SiO2 (quartz) for durability. The primary mirror is mounted in a cell with six external push-pull collimation knobs on the back of the tube, and the center-marked primary makes collimation with a laser a snap.
With a cropped-sensor DSLR camera or an astronomy camera such as the ZWO ASI071MC-Pro with an APS-C sensor, this scope gives a field of view across the diagonal of nearly 2 degrees, more than enough to frame the brightest regions of extended deep-sky objects like the Andromeda and Triangulum galaxies, the Orion Nebula, and the Horsehead Nebula. |
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| BRESSER EXOS-II Dual Motor EQ Mount |
| Mount and Tripod. The BRESSER EXOS 2 is a rugged mount with high rigidity and precision tracking for visual observation and astrophotography. The tripod is extremely rigid to suppress vibrations really well. This model is very well machined and has a polar finder scope and precise graduated circles. A powered twoaxis control (BRESSER Exos Duo) or a GoTo-Kit is available as an optional extra. The BRESSER EXOS 2 can take the weight - depending on length and use of up to 13 kg. This allows you to use refractors of up to 152 mm aperture and mirror telescopes of up to 203 mm aperture. |
- The BRESSER EXOS 2 is a rugged equatorial mount with high rigidity and precision tracking for visual observation and astrophotography
- The tripod is extremely rigid to suppress vibrations really well. This model is very well machined and has polar finder scope and precise graduated circles.
- A powered two axis control (BRESSER Exos Duo) or a GoTo-Kit is available as an optional extra.
- The BRESSER EXOS 2 can take the weight - depending on length and use of the telescope of up to 13 kg
- Included: Mount, height adjustable tripod, 2x flexible shaft, polar finder scope, 4.5 Kilogram counterweight
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| BRESSER EXOS-II Mount Special Features |
- weight EXOS II Goto: 4.5kg (without counterweight shaft, which weights 1.0kg)
- load capacity: 13kg
- weight Tripod: 4.9kg
- maximum height tripod: 108cm
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| BRESSER RA/DEC-Motor Kit Duo for EXOS-2 and EQ/MON-2 |
This Bresser Messier RA+DEC-Motor + Controller MON2 lets you control your Messier telescope more comfortably. Including controller. Suitable for Bresser Messier telescopes or mount with Exos-2 or Mon-2 equatorial mount.
Motorkit for both axes (RA und DEC). Handcontrol with 3 preset speeds (1x (sidereal speed); 8x; 32x). Suitable for entry level astrophotography. |
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| What's in the Box |
- 200mm f/4 Newtonian optical tube assembly
- 2" Crayford-style linear bearing focuser with 1.25" eyepiece adapter
- 8x50mm straight-through finder with bracket and base
- Tube rings
- 8" Vixen-style dovetail rail
- 2" extension tube with 35mm extension
- Front dust cover
- No instruction manual is included for OTA
- EXOS II Mount
- Height Adjustable Tripod
- 2x flexible shaft
- Polar Finder Scope
- 4.5 kg Counterweight
- Stepping motor for RA- and DEC axis
- Mounting material and clutches
- Handcontrol
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| The high-quality 2" Crayford focuser |
| The 2" Crayford focuser with 1:10 speed reduction is included. Accessories are evenly clamped with a brass compresssion ring. The 1.25" reducer is equipped with a brass ring, too. The focuser will not wobble even when used with heavy cameras. With the 1:10 speed reduction, precise focusing is possible. Point-shaped stars over the whole field are the result. |
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| Tube and Mounting Rings |
The tube of this imaging Newtonian is made from rolled steel for good thermal stability and it's capped with end rings of die-cut aluminum for protection and rigidity. It includes a dust cap. The scope also comes with two split-hinged die-cast aluminum mounting rings with felt lining to protect the finish of the tube. These rings make it easy to rotate the tube to bring the focuser and finder to the most comfortable viewing position. The bottoms of the rings have threaded mounting holes for a Vixen-style mounting plate (which is included) or an optional Losmandy-style plate. The tops of the two rings each have two threaded M6x25mm holes that are 7.5" apart so you can install a separate dovetail to mount other accessories such as a guide scope.
The tube has an attractive outside gloss white finish and a matte black interior finish to reduce stray reflection and increase image contrast. The tube is 9.15" in diameter (9.3" at the end rings), 27.75" long, and it extends beyond the focuser to act as a shield to prevent stray light from entering the tube and reducing image contrast. The primary mirror cell also includes a low noise, long-lifetime cooling fan powered by 8 AA batteries (batteries not included). |
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| GSO 6" F/4 Telescope SPECIFICATION |
| Country of Manufacturing |
OTA - MADE IN TAIWAN |
| Optical Design |
Fast Newtonian |
| Primary Mirror |
200 mm Primary Mirror 94% reflectivity dielectrically coated/minimum 1/12th wave, BaK7 glass |
| Focal Length |
800 mm |
| Focal ratio |
f/4 |
| Highest Practical power |
- - - |
| Faintest Steller Magnitude |
- - - |
| Finder |
8x50 Fully multi-coated achromatic finder with quick-release bracket |
| Focuser |
2" Monorail with 1:10 dual speed transmission and reducer to 1.25", brass compression ring, with 2" extension tube - to achieve focus with all kinds of eyepieces |
| Accepts Eyepiece Barrel Ø |
50.8mm (2") to 31.7mm(1.25") |
| Mirror Cell |
Primary mirror Cell with 12V Main mirror cooling fan |
| Standard Eyepiece(s) |
Your choice of any two GSO Premium Plossl Eyepiece 1.25''
any one from series:: 12mm / 9mm / 6mm / 4mm
any one from series:: 15mm / 20mm / 25mm / 32mm
[ subject to availability in choices ] |
| View Finder Scope |
8x50mm Fully multi-coated achromatic straight finder |
| Barlow Lens |
OPTIONAL |
| Mount type |
German Equatorial |
| Astro-imaging capability |
Lunar Planetary & Deep Sky |
| Mounting Ring |
Two mounting ring |
| Dove tail Bar system |
Yes |
| Tube material |
Steel |
| Tube dimension |
length 720 mm / diameter 240mm |
| Weight, optical tube |
9 kg including mounting ring and 6x30 finder |
Shipping Weight OTA |
Tube : Net weight - 9 Kg / Gross weight: 12 Kg |
| Shipping Cartoon Dimension 200/F4 OTA |
86 x 42 x 34 cm3 |
| BRESSER EXOS-II Technical Specifications |
| Mount Type |
German/Equatorial Mount with GoTo |
| Polefinder scope |
included |
| Drive system in RA / AZ |
12V DC servo motors with encoders |
| Fine movements |
Electric (RA and DEC) |
| Bearing in alt-azimuth / RA |
2 ball bearings |
| Bearing in elevation / DEC |
2 ball bearings |
| Material tripod3 |
Stainless Steel |
| Colour |
white |
| EXOS-II DIMENSIONS & WEIGHTS |
| Total length |
100 mm |
| Total width |
100 mm |
| Total height |
160 mm |
| Maximum load capacity |
13 kg |
| Net Weight total (incl. accessories) |
15000 g |
| Net weight mount (incl. accessories) |
5 kg |
| Net weight tripod (incl. accessories) |
4.9 kg |
| Net weight pier (incl. accessories) |
4.9 kg |
| Counterweight |
4.5 kg |
| DIMENSIONS & WEIGHTS of RA Motor |
| Total length |
65 mm |
| Total width |
55 mm |
| Total height |
54 mm |
| Net Weight total (incl. accessories) |
1440 g |
1] Operation alternatively with a suitable power supply (included). Only use a power supply as indicated on the device / in the manual.
2] Operating voltage: 12V DC Connection power supply: DC- plug 5.5/2.5mm Polarity of the 12V connection socket: pin inside + / plug shaft unit. |
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| Suggested Accessories with this Telescope |
SOLAR FILTER
- SOLARIX Solar filter (Explore Scienfific - USA) provide more pleasing and natural Yellow-Orange image of the Sun . . . . Rs 1920
EYEPIECES (Super Premium Plossl for GSO) EYEPIECES (Super Premium Plossl for GSO)
- 40mm Plossl Eyepiece 1.25" . . . . Rs. 2820
- 32 mm Plossl Eyepiece 1.25" . . . . Rs 2640
- 25 mm Plossl Eyepiece 1.25" . . . . Rs. 2550
- 20 mm Plossl Eyepiece 1.25" . . . . Rs. 2460
- 15 mm Plossl Eyepiece 1.25" . . . . Rs. 2280
- 12 mm Plossl Eyepiece 1.25" . . . . Rs. 2100
- 9 mm Plossl Eyepiece 1.25" . . . . Rs. 2100
- 6 mm Plossl Eyepiece 1.25" . . . . Rs. 2100
- 4 mm Plossl Eyepiece 1.25" . . . . Rs. 2100
- GSO SuperView 15mm 1.25" Wide Angle Eyepiece . . . . Rs. 3000
- GSO SuperView 20mm 1.15" Wide Angle Eyepiece . . . . Rs. 3000
- GSO SuperView 30mm 2 " Wide Angle Eyepiece . . . . Rs. 4800
- GSO SuperView 42mm 2" Wide Angle Eyepiece . . . . Rs. 4800
- GSO SuperView 50mm 2" Wide Angle Eyepiece . . . . Rs. 4800
FINDER
- GSO 8x50 RA finder . . . . Rs 4800
BARLOW
- GSO 2x ED-Barlow-Lens (Multicoated) . . . . Rs.4800
- GSO 2X Achromatic BARLOW LENS- fully multicoated 1.25" . . . . Rs. 1470
- ED 3X Barlow Lens GSO 1.25" . . . . Rs. 2640
- 3 Elememt 2.5x Barlow GSO 1.25" . . . . Rs. 2370
- 3 Elememt 5x Barlow GSO . . . . Rs. 2820
CAMERA ATTACHMENTS
- T-RING Nikon . . . . Rs. 930
- T-RING Canon . . . . Rs 930
- T Adapter 1.25" . . . . Rs. 750
- Super ACHROMATIC (MultiCoated /High Colour corrected) 2X BARLOW 1.25" OD, 2 ELEMENT LENS with T-thread for direct camera attachment /with Brass compression ring / GSO. . . . Rs. 3,000
- 2 inch T-2 Camera Adapter . . . . Rs 1650
- GSO 40mm Camera adapter 2 inch . . . . Rs. 1560
- Eyepiece Projection Camera Adapter . . . . Rs. 2100
- Mobile Cell Phone Adapter . . . . Rs. 1560
- GSO 1.25" 32mm Camera Projection Lens (CPL) eyepiece ... Rs. 3900
- GSO 1.25" 40mm Camera Projection Lens (CPL) eyepiece ... Rs.4080
- GSO 2" 30mm Camera Projection Lens (CSV) eyepiece ... Rs.5700
- GSO 2" 42mm Camera Projection Lens (CSV) eyepiece ... Rs.5700
- COMA Corrector 2 inch . . . . Rs 5700
- GSO....0.5X Focal Reducer 1.25" with 25mm extension tube ....Rs 1560
- GSO.....0.5x Focal Reducer 2 inch ....Rs 2100
- GSO Planet View filter each . . . . Rs 660
- GSO 2 inch EXTENSION TUBE
35mm . . . . Rs 1470
50mm . . . . Rs 1560
80mm . . . . Rs 1650
- GSO....0.5X Focal Reducer 1.25" with 25mm extension tube ....Rs 1560
- GSO.....0.5x Focal Reducer 2 inch ....Rs 2100
- GSO Planet View filter each . . . . Rs 660
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