Manufacturers & Suppliers of Astronomical Telescopes in India Serving Amateur Astronomers Since 1976
Manufacturers & Suppliers of Astronomical Telescopes in India Serving Amateur Astronomers Since 1976
GSO RC 8" with EXOS-II EQ Mount
GSO RC 8" with EXOS-II EQ Mount
GSO RC 8" with EXOS-II EQ Mount
Polar Scope . . . . Rs 6600
Dual Axis Motor Drive with HAND PAD CONTROLLER . . . . Rs 16500
Dual Axis Motor Drive with HAND PAD CONTROLLER . . . . Rs 16500
EXOS-II GoTo Upgrade Kit . . . . Rs 38100
EXOS-II GoTo Upgrade Kit . . . . Rs 38100
Polar Scope
By LAMAGAT Frederic
GSO RC 8inch | Statue of Liberty Nebula
GSO RC 8inch | Moon Crater
GSO RC 8inch | Moon Crater
By Ram Mohan from Bangalore
Optical Design: True Ritchey Chrétien / RC by GSO
Ritchey Chretien systems are excellent Cassegrain-configuration optical systems which are great performers for many different types of astronomical observation, but are particularly well suited for astrophotographic purposes. The RC has a concave hyperbolical primary mirror and a convex hyperbolical secondary mirror.
Contrary to Maksutovs or Schmidt-Cassegrains which have spherical mirrors and need image correctors, and contrary to Newtonians that need coma correctors, the RC system is a well corrected photographical instrument that uses only mirrors (no false colour!) and does not require any corrector with many cameras.
Hyperbolic RC system is superior to a standard Schmidt-Cassegrain and other optical designs in many important respects: a well-designed RC will have no Coma (elongation of stars) around the edge of the field; an RC will give a sharper on-axis response than most SCTs or Newtonians; they are completely false colour free; they have no front corrector plate, thus reaching thermal equilibrium quicker and cutting down dramatically on dewing issues.
The resulting image correction throughout the field as well as the sharpness on the optical axis are superior to typical Schmidt-Cassegrains or Newtonians.
| TELESCOPE SPECIFICATION | |
| RC 8 | 8" f/8 Ritchey-Chrétien Telescope with EXOS-II |
| Optical Design | Ritchey- Chretien: True RC (Ritchey-Chretien) with a hyperbolic primary and a hyperbolic secondary mirror. No glass corrector plates or lenses in the optical train. |
| Diameter Primary Mirror | Quartz - Mirrored 8" /203 mm:surface quality 1/12 Lambda or better. Primary Mirror 96% reflectivity dielectrically coated. |
| Secondary mirror | Secondary 96% reflectivity dielectrically coated/collimatable |
| Focal Length, Focal Ratio | 1624 mm, f/8 |
| Recommended Maximum Visual Power | 33x through 300x approx. |
| Accepts Eyepiece Barrel Ø | 50.8mm (2") to 31.7mm(1.25") |
| Focuser | 1:10 Crayford focuser for extremely smooth focusing. The dual speed 1:10 focusing knob is particularly important for astro imaging. No image shift and up to 5kgs load capacity! The focuser accepts 2" and 1.25" accessories. The 2" Monorail focuser - much better, than a simple crayford design |
| 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) |
| Finder Scope | 8x50mm Fully multi-coated achromatic finder |
| Star Diagonal | not included |
| Computer-optimized baffle system | The inside of the tube is lined with computer-optimized baffles for optimum suppression of stray light. |
| Length of tube | 580 mm incl. focuser |
| diameter of tube | 230 mm |
| Optical Tube Net Weight | 7.5 kg |
| Dovetail mounting rail | A GP-style dovetail rail is mounted on the underside of the tube. It fits in all mounts that accept GP / Vixen dovetail plates. |
| Mount / Stand | EQUATORIAL (EQ5) parallactic mount and steel tripod stand |
| Mounting Base Net Weight | 5.3 kg |
| Tripod Net Weight | 4.6 kg |
| Tripod | Height: 68cm - 108cm |
| Counterweight(s) | 1x 4.5 kg |
| Max weight of the mounted device | about 13 kg (Optics) |
This device focuses a lot of light.
Looking directly at the SUN through this device can result in partial or complete loss of vision.
For observing the SUN, we recommend you buy a 'Solar Safety Film' for this Telescope.
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STARTRACKER [ India ]
EXPLORE SCIENTIFIC [ USA ]
G.S.O. [ Taiwan ]
Goto Mounts / Tripods [ U.S.A ]
BRESSER [ Germany ]
William Optics [ Taiwan ]
Founder Optics [ Taiwan ]
MEADE [ U.S.A ]
CELESTRON [ U.S.A ]
S V Bony [ China ]
ZWO [ China ]
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