8" f/12 Classical Cassegrain Telescope by GSO
Classical Cassegrain telescope with 8” aperture and focal ratio of f/12, ideal for visual observation and imaging of the Moon, planets, double stars, planetary nebulae, and other compact celestial objects
Folded optical design packs a focal length of 2436mm into an optical tube only 535mm long
No glass corrector plate means no chromatic aberration and fast temperature equalization and resistance to dew formation
Lightweight tube and optics for a total weight of just 20lbs, ideally matched to many mid-capacity alt-az and equatorial mounts
Dual-speed 2” Crayford focuser with 1.25” adapters with non-marring compression rings
Includes Losmandy and Vixen-style dovetail rails, shoe for finder scope, and dust cap 
 
Optical Tube System
Open Optical Tube System Prevent Dew Formation Thus Eliminate The Requirement Of Dew Shield. Comes Includes With Dual Speed 2'' Focuser. Fixed Primary Mirror And Secondary Preventing Mirror Flop Issue In Schmidt Cassegrain. Smaller Central Obstruction Of Just 33% Allow Much Better Contrast Than Similar Schmidt Cassegrain
 
96% Reflectivity Dieletric Coated Aluminium
These Mirror Are Specially Coated To Provide Maximum (96%) Light Reflectivity To Get The Best Contrast Available For Image Or Visual Usage. Compund RC Telescope Are Very Compact Due To The Optical Design
 
Precision Dual Speed Focuser
Most Standard SCT Comes With Standard Focuser, Our Classical Cassegrain Telescope Comes With High Quality Dual Speed Linear Bearing Focuser Allow Precision Focus And Sharp Image. Linear Bearing Prevent Focuser Flexure While Focusing And Locking
 
High Quality Internal Baffle
Our Classical Cassegrain Telescope Are Built With highest Standard Baffled Tube To Provide Maximum Contrast And Prevent Stray Light From Disturbing Viewing Or Imaging. These Baffle Systems Only Found In Higher Quality Telescopes
 
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 99% 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
34% area 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!
 
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, 1x4.5kg 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
8' F/12 Classical 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"
8x50 Achromatic Finder Telescope
2'' Dual Speed 1:10 Microfocuser
1X 50mm Spacer
2X 25mm Spacer
Dual Vixen Dovetail Plate (Top & Bottom)
Dust Cover
Equatorial Mount with GoTo
Height Adjustable Tripod
Polar Finder Scope
1x counterweight 4.5kg
Startracker Handbox DE / GB / FR / ES / IT
Manual

TELESCOPE SPECIFICATION

GSO TELESCOPE SPECIFICATION
Country of Manufacturing	TAIWAN
Optics:	Cassegrain Optics with parabolic primary and hyperbolic secondary mirror
Aperture:	203 mm - 8"
Focal length:	2436 mm
F-ratio:	f/12
Lowest useful magnification	29x
Highest useful magnification	300x
Highest theoretical magnification	400x
Limiting stellar magnitude	14.2
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 finder
Star Diagonal	Mirror Star Diagonal 1.25"
Resolving Power	116.00arc*sec
Optical Quality	Diffraction limited
Reflectivity	99% to primary and secondary mirror
Suitable for Infrared Photography:	yes
Dove Tail	Dual V-Vixen Dovetail Plate
Central Obstruction	68mm (10.9% By Area)
Optics	Internal Baffled
Tube diameter:	191 mm
Tube length:	25" approx
Weight:	7.5 kg approx
Connection-thread of the focuser:	M90x1 on the tube
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 GoTo
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

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.

Buy 1000 OAKS Solarite Safety Film

Instructions for use in ENGLISH

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