G.S.O 6″ F/12 M-CRF Cassegrain Telescope with EXOS-II GoTo System

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.

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.

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, 1×4.5kg counterweight, manual
Startracker handbox DE/GB/FR/ES/IT

GoTO Special Features
weight EXOS II Goto: 5.0kg (without counterweight shaft, which weighs 1.0kg)
payload capacity: 13kg
weight Tripod: 4.9kg

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″
6×30 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

WARNING

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.