| 6" Cassegrain Telescope by GSO |
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6" F/12 M-CRF Cassegrain Telescope with EXOS-II GoTo System
D=154mm / F=1848mm F/12 - MADE IN TAIWAN Telescope OTA |
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99300 + 18% GST |
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GSO makes the World's Finiest Astronomical Telescopes with unmatched manufacturing optical precision.
100% MADE IN TAIWAN |
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6" F/12 Classical Cassegrain Telescope by GSO |
| Cassegrain telescopes combine the benefits of a Newtonian telescope being a pure reflective system with a short-built design. In terms of optical quality, Cassegrain telescopes are superior to customary Schmidt-Cassegrain systems. Cassegrain telescopes are mainly used for photography of the moon and the planets and for observation of astronomical objects. Thanks to the highly sensitive sensors built into modern astro cameras, even deep-sky photography of nebulae, star clusters and galaxies is possible. |
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| The advantages of GSO Cassegrain Telescopes in summary: |
- Large corrected and illuminated image field due to parabolic primary and hyperbolic secondary mirror with less field curvature than with SC telescopes.
- Pure reflection system without Schmidt plate, as a result even Infrared photography becomes possible at full sharpness.
- Significantly quicker temperature adaption than a SC, due to open design.
- Brighter image due to 96% dielectric coating on primary and secondary mirror.
- No shifting, because the primary mirror is fixated
- High-quality 2" Crayford focuser with micro-gear reduction and compression rings for 2" and 1.25" accessories
- 33% obstruction caused by secondary mirror, comparable to SC telescopes.
- Better sharpness on the optical axis due to precise mirror surfaces and the lack of a Schmidt plate
- Less problems from dew: with Schmidt-Cassegrains you get condensation on the front plate, not with a Cassegrain
- Interior baffles for even higher contrast
- Generous backfocus allowing the use of 2" accessories.
- Compact tube with only 500 mm length - can be operated with smaller mounts
- Significantly less expensive than other classical Cassegrain telescopes!
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| Cassegrain Optics are versatile Telescopes |
Mobile travel scope:
Take the compact and light telescope with you to your traveling location. It only takes a few seconds to unscrew the focuser, making the Cassegrain even more compact and fitting your hand luggage.
Telescope for observation of Astronomical Objects:
Due to the bright and contrasty image and also because of the large corrected and illuminated image field, the Cassegrain is optimal for observation of astronomical objects. 2" and 1.25" accessories are not a problem. The obstruction by the secondary mirror is only 33%. This is comparable to Schmidt-Cassegrain telescopes. As a result of the 96% reflection of primary and secondary mirror the image is significantly brighter. Even the field sharpness is better, because the image field is basically undistorted.
Telescope for Astrophotography:
The Cassegrain is very well suited for photography of the moon and the planets. The visual contrast is very high. Due to interior baffles stray light is effectively suppressed. Planets and tiny moon craters can be seen without the slightest chromatic aberration. Thanks to its micro-gear reduction the Crayford focuser permits precise focusing. When using modern, highly sensitive CMOS cameras, even deep-sky photography becomes possible with the GSO Cassegrain. An additonal correction lens isn´t needed, because the image field is well corrected up to APS-C sensor format. |
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| BRESSER EXOS-II GoTo EQ Mounting System |
BRESSER EXOS-2 GoTo Equatorial Mount. Mount, tripod and hand box with computer. This German mount has tracking motors in both axes that follow celestial objects very precisely.
The handbox with GoTo works reliable and controls the mount in every situation.
Precise ball bearings in both axes ensures minimal backlash at all nine possible tracking speeds.
The mount rests on a very tough and rigid steel tripod and can take optical tubes of up to 13 kg. GOTO Stargazing at the push of a button!
The Startracker GoTo System enables beginners to start astronomical observations in just a few minutes, and guides you to objects that are hard to localize through a standard finder scope.
Just push the button and the GoTo System will find planets, nebulae or galaxies for you and position your telescope automatically and precise.
The GoTo System database includes thousands of astronomical objects.
The Messier mount with GoTo System allows you to observe without tedious searching, or image faint objects that are hard to find in a standard finder scope.
The BRESSER StarTracker GoTo systems uses servo motors for both axes and features an ST-4 compatible autoguiding input. Guiding aggressivity can be set on the mount itself.
The menu navigation of the Startracker Handbox is also multilingual and offers the settings of German, English, French, Spanish and Italian. |
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| EXOS-II GoTo Special Features |
- Equatorial GoTo-Mount with stainless steel tripod
- Maximum payload: up to 13 kg
- For easy finding and guiding the deep sky objects
- Ideal for astrophotography because of an ST-4 compatible autoguider port
- Included: Mount with tripod, Startracker handbox controller, 1x4.5kg counterweight, manual
- Startracker handbox DE/GB/FR/ES/IT
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| GoTO Special Features |
- weight EXOS II Goto: 5.0kg (without counterweight shaft, which weighs 1.0kg)
- payload capacity: 13kg
- weight Tripod: 4.9kg
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| In The Box |
- 6" f/12 Cassegrain
- Choice of two eyepiece (Any ONE from : 4, 6, 9, 12mm and any ONE from 15, 20, 25, 32mm)
- Mirror Star Diagonal 1,25"
- 6x30 Achromatic Finder Telescope
- 2" focuser with reduction to 1.25"
- Dovetail GP Level
- Dust protection cap for the focuser and front aperture
- Finder shoe (mounted)
- M90 extension tubes
- German Manual
- Equatorial Mount with GoTo
- Height Adjustable Tripod
- Polar Finder Scope
- 1x counterweight 4.5kg
- Startracker Handbox DE / GB / FR / ES / IT
- Manual
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| GSO TELESCOPE SPECIFICATION |
| Country of Manufacturing |
TAIWAN |
| Optics: |
Cassegrain optics with parabolic primary and hyperbolic secondary mirror |
| Aperture: |
152 mm - 6" |
| Focal length: |
1848 mm |
| F-ratio: |
f/12 |
| Reflectivity: |
96% to primary and secondary mirror |
| Suitable for Infrared Photography: |
yes |
| Backfokus: |
roughly 150 mm from the 2" receptacle |
| Tube diameter: |
191 mm |
| Tube length: |
roughly 500 mm |
| Weight: |
5.4 kg |
| Secondary Mirror Obstruction: |
33% (linear) |
| Focuser: |
2" Crayford focuser with micro-gear reduction |
| Connection-thread of the focuser: |
M90x1 on the tube |
| Dovetail: |
Vixen-GP - Skywatcher-EQ5 style |
| 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 |
6x30mm Fully multi-coated achromatic finder |
| Star Diagonal |
Mirror Star Diagonal 1.25" |
| GENERAL TECHNICAL DATA for EXOS-II GoTo |
| Mount Type |
German/Equatorial Mount with GoTo |
| Polefinder scope |
included, illumination optional |
| 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 |
| DIMENSIONS & WEIGHTS for EXOS-II |
| 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 |
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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 1470
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
DIAGONAL
- GSO 1.25" Mirror Diagonal . . . . Rs.2100
- GSO 2 inch Mirror diagonal . . . . Rs 5700
- GSO 2 inch 99% Dielectric mirror Diagonal CNC . . . . Rs 7500
- GSO 2 inch 99% Quartz Dielectric mirro Diagonal CNC . . . . Rs 9300
- GSO 45 Degree Erecting Image Diagonal . . . . Rs 2640
FINDER
- GSO 6x30 Straight finder . . . . Rs.2460
- GSO 8x50 straight finder . . . . Rs 3900
- 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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