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6" Cassegrain Telescope by GSO
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6" F/12 M-CRF Cassegrain Telescope with EXOS-II Dual Axis Motor & HPC
D=154mm / F=1848mm F/12 - MADE IN TAIWAN Telescope OTA
85800 + 18% GST
GSO 6" Classical Cassegrain Telescope GSO 6" Classical Cassegrain Telescope
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[ click to enlarge ]
GSO 6" Classical Cassegrain Telescope GSO 6" Classical Cassegrain Telescope
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[ click to enlarge ]
GSO 6" Classical Cassegrain Telescope
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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.
 
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!
 
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.
 
EXOS-II 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
 
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
  • BRESSER EXOS II EQ-5 Mount with Motor
  • Hand Pad Control
  • Height Adjustable Tripod
  • 2x flexible shaft
  • Polar Finder Scope
  • 4.5 kg counterweight
 
TELESCOPE SPECIFICATION
Country of Manufacturing TAIWAN
Optics: Cassegrain optics with parabolic primary and hyperbolic secondary mirror
Aperture: 152 mm - 6"
Focal length: 1836 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"
EXOS-II GENERAL TECHNICAL DATA
Colour white
Material Metal
Product series Messier
EXOS-II DIMENSIONS & WEIGHTS
Net weight (without access.) 4500 g
Net Weight total (incl. accessories) 14500 g
Net weight tripod (incl. accessories) 4.9 kg
Shipping Weight 20 kg approx
 
Instructions for use in ENGLISH
Bresser Operating Manual for EXOS-II EQ Mount
 
WARNING
Buy BAADER Solar Safety Film
Buy 1000 OAKS Solarite Safety Film
 
The following items are FREE with the telescope listed above.
Magnitude 5 STAR Atlas
Directional Compass  FREE
Micro Fiber (Anti-Static) Cleaning cloth
Optics Cleaning Fluid
The Moon Map Poster B/W chart unfold to 22"x26"
110 Messier Object Locator     A4 size front back colour print
109 Deep Sky CALDWELL Catalogue A4 size front back colour print
Star Dial - Identifying Stars & Constellations
Various Astronomical Post-Card (SET-3)
Desiccant Cap - Refillable desiccant cap to protect fine optics
Astronomical Telescope - user guide
 
Suggested Accessories with this Telescope
    SOLAR FILTER
  • Baader Solar Filter (off-axis) Germany . . . . Rs. 1200
  • 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. 840
  • T-RING Canon . . . . Rs 840
  • 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. 1830
  • 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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