GSO-Optics 8" F5 Newtonian reflector telescope for observation and astrophotography - optical tube assembly
Aperture 200 mm (8") / focal length 1000 mm / photographic speed f/5
High quality parabolic primary mirror with 94% enhanced reflectivity coatings for a brighter and contrastier image
Largely dimensioned secondary mirror with 63 mm diameter (minor axis) - very good illuminated field for astrophotography
Primary mirror cell and secondary mirror holder completely made of metal - not plastic - fully adjustable (image of the secondary mirror holder at left)
Precise 2" Crayford focuser with 1:10 dual speed transmission for exact focusing - already included
Primary mirror cooling fan for less cooling time
Rigid steel tube instead of a wobbly aluminium tube - better adjustment stability
 
GSO 8" f/5 Newtonian telescope - for observing and astrophotography
This telescope is a true all-rounder and ranks among the best in this range range. Through the versatile focal ratio of f/5, the Newtonian offers best prerequisites for lunar and planetary observations. The optimized secondary mirror is designed for deep-sky observations as well as for astrophotography.
 
The advantages of the GSO Newtonian at a glance
Moderate focal ratio for short exposure times for astrophotography.
Very high sharpness on moon and planets
Secondary mirror provides good illumination, for example for DSLR cameras
Large backfocus allows using popular coma correctors and cameras
High-quality primary mirror of optical BK7 glass with enhanced 94% reflectivity
coating provides a bright, clear image.
Stable 2" Crayford focuser with 10:1 dual speed and 1.25" reduction adapter
Quicker cooling down, quicker observing, quicker photographing through fan for the primary mirror
Steel tube and metal mirror cells for optimal adjustment stability
Since many years, we are a GSO distributor and we know about the exceptional quality of GSO telescopes. The manufacturer keeps the optical performance of the mirrors on constantly high level. Significant differences do not occour at GSO, in opposite to other suppliers from far east.
 
What's in the Box
200mm f/5 Newtonian optical tube assembly
2" dual speed Crayford-style micro focuser with 1.25" eyepiece adapter
8x50mm straight-through finder with bracket and base
Tube rings
13" red Vixen-style dovetail rail
2" extension tube with 35mm extension
Front dust cover
No instruction manual is included
 
The precise 2" crayford focuser with 1:10 micro transmission
We offer this Newtonian telescope with a 2" Crayford style focuser with integrated 1:10 dual speed transmission. This focuser works very precise even with heavy accessories like astro cameras. With a bit of experience, you can achieve accuracies around 0.08 mm which is sufficient even for very high resolution sensors.
 
High-quality primary mirror with f/5 and 94% reflectivity
This Newtonian shows its full potential at observation and astrophotography due to a high-quality primary mirror made of optical BK7 glass, free from internal stress. The parabolic mirror has a 94% reflectivity coating, thus offering a brighter and contrastier image. You can instantaneously notice the difference to a standard coating.

Due to the focal ratio of f/5, this Newtonian belongs to the all-round telescopes for astrophotography and observing.

No vignetting at the edge - full illumination through large 63 mm secondary mirror No shadow at the edge, you will be satisfied with a bright image with full illumination even with modern DSLR or CCD cameras. But 2" wide field eypeces are also supplied with light up to the edge of the field stop.

Enjoy your image more with optimal field correction - Only a good coma corrector turns this Newtonian into a true astrograph. Makes a true astrograph out of this Newtonian.

TELESCOPE SPECIFICATION

TELESCOPE SPECIFICATION
Country of Manufacturing	TAIWAN
Optical Design	Parabolic Newtonian Reflector
Aperture: Primary mirror	200 mm Primary Mirror 94% reflectivity dielectrically coated/minimum 1/12th wave, BaK7 glass
Focal length:	1000 mm
Focal ratio:	f/5
Highest Practical Power	300x
Faintest Steller Magnitude	14.2
finder Scope	8x50 Fully multi-coated achromatic finder with quick-release bracket
Primary mirror:	Parabolic primary mirror with 94% enhanced reflectivity coatings and quartz layer
Field illumination:	28 mm diam. (100%) - ideal for APS-C format sensors with matching coma corrector
Focuser	2" Monorail with 1:10 dual speed transmission and reducer to 1.25", brass compression ring, with 2" extension tube - to achieve focus with all kinds of eyepieces
Accepts Eyepiece Barrel Ø	50.8mm (2") to 31.7mm(1.25")
Mirror Cell	Primary mirror Cell with 12V Main mirror cooling fan
Secondary mirror:	63 mm diameter (minor axis) with 94% enhanced reflectivity coatings and quartz layer
Eyepiece 1.25" / 2" OD	OPTIONAL
Barlow Lens	OPTIONAL
Mount type	NO
Astro-imaging capability	Lunar Planetary & Deep Sky
Mounting Ring	Two mounting ring
Dove tail Bar system	Yes
Tube material	Steel
Tube dimension	length 940 mm /diameter 240 mm
Weight, optical tube	10 kg with rings and finder
Shipping Weight OTA	Tube : Net weight - 10 Kg / Gross weight: 14 Kg
Shipping Carton Dimension 8" F5 OTA	120 cm x 41 cm x 34 cm

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

Free Items [ Subject to Availability ]

• Collimination Tool (for Newtonian)
• 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
• Astronomical Telescope - User Guide
• The Moon Map Poster B/W chart unfold to 22"x26"
• Magnitude 5 Star Atlas Book

Suggested Accessories

246mm Cap Dia Solar Filter
₹ 3900

Solar Filter for GSO 8" Telescopes
₹ 2400