Product number: GSD880

EUR 899,00RRP EUR 999,00you save 10% (EUR 100,00)


incl. 19 % VAT (DE)  
The VAT indicated refers to that applicable in Germany. After logging in, the VAT amount is adjusted to the applicable VAT of the stored delivery country. Therefore, the final price may vary accordingly.
excl. 54.94 € shipping costs (DE)  
Please log in to calculate shipping costs to your country.
more details to the shipping costs ...

  • On stock





rating: 5.0 of 5
  • Details..
  • Technical data..
  • In the box..
Join the growing number of happy users of GSO quality telescopes! We are very proud of GSO´s exceptional image quality at a very affordable price. Thousands of objects are within reach of this 10" Newtonian-style telescope.

With its highly refined Dobsonian style mount the telescope is the ideal companion for discerning beginners and for advanced observers alike! A 10" mirror will collect about 55% more light than an 8" mirror. This means that the image is much brighter, and many more objects are within reach. Galaxies will reveal their spiral structure. Planetary nebulae will display splendid detail where a smaller telescope will hardly show anything. The diffraction limited quality optics from GSO will at the same time offer razor sharp images even at high magnifications. Planets and the moon will be seen in great detail. The visibility of details is not limited by the telescope, but rather by observing conditions!

Optical Quality The centerpiece of any telescope is its optics. GSO produces parabolic primary mirrors of very high quality. It is our firm opinion that GSO offers better mirrors than typical in this price range. We guarantee a diffraction-limited performance, which essentially means that the performance is limited by observing conditions and the laws of physics rather than by the telescope itself!


GSO 2" Crayford Focuser: This is one of the best focuser this manufacturer has to offer. It is far superior to most classic rack-and-pinion focusers:
no image shift when focusing
large load capacity: up to approx. 3 kg with a firm friction setting
1:10 dual speed microfocuser for far improved focusing precision
compression rings for 2" and 1.25" accessories


New! Full metal secondary holder: Completely new developed was the secondary holder made out of metal. The secondary is safely glued onto the holder and not holded by plastic parts anymore. This prevents tensioning from changing temperatures.


Also, the holder guarantees the precise orientation of the secondary to the focuser, unintended twisting is not possible anymore.


New Altitude Tension & Balancing System: On most Dobsonian telescopes the altitude bearing is a very simple design. GSO has developed an improved altitude bearing with additional functionality: a strong steel shaft bears the weight of the tube. The tube is guided and kept in position through two CNC machined surfaces. The desired tension can be freely adjusted with a large knurled knob on both sides. This is particularly helpful when changing eyepieces where the telescope is temporarily out of balance.

Balancing System: This is another major improvement of this bearing system. The telescope can be balanced by moving it up or down a couple of centimetres. This may be necessary when adding a second finderscope (like a Telrad) or when using very heavy eyepieces or a binoviewer. A scale on both sides allows you to easily achieve a symmetric bearing position.


Azimuth Roller Bearing: A simple teflon friction bearing used by some other manufacturers (also by GSO in the past) offers a rather stiff motion that makes tracking at high magnifications difficult. This becomes particularly obvious when the telescope is pointed near the zenith so that the lever arm becomes very short. In this position tracking is almost impossible in some Dobsonians!

The new GSO Dobsonians have a modern industrial roller bearing for a very easy movement. Metal plates above and below the bearing prevent the rollers from sinking into the softer wood of the rocker box, so the movement will remain smooth even after years of use.


Manual: The English manual is also available as PDF, it can be downloaded here.
Aperture:10" / 250 mm
Focal Length:1250 mm
Focal Ratio:f/5
Main Mirror:BK7 with 94% forced reflection
Optical Quality:Parabolical main mirror - better, than diffraction limited
Resolution:0.5"
Limited Mag:15.1 mag
Secondary mirror obstruction:Only 25%
Tube diameter:305 mm
Tube length:1210 mm
Tube weight:15.5 kg
Rockerbox mount dimensions:Height 640 mm / Diameter 540 mm
Rockerbox mount weight:12.2 kg
Collimation:Center Mark on the main mirror
GSO Dobsonian Telescope
Fan behind the main mirror
8x50 Finder with achromatic optic
2" Crayford focuser - 1:10 micro - reduction from 2" to 1.25"
30 mm 2" Wide Angle ERFLE with 70° field for good overfiew
9 mm Super Plössl - multicoated
35mm 2" extension
eyepiece and accessory tray for eyepieces and filters
Collimation manual



Recommended accessories




Accessories for mounts

Barlow, Corrector, Reducer

TSB22

TS-Optics TSB22 2x ED Barlow lens, 2 inch, ED Element - BIG BARLOW

TS-Optics TSB22 2x ED Barlow lens, 2 inch, ED Element - BIG BARLOW

  • On stock

EUR 109,90RRP EUR 129,00you save 14.8% (EUR 19,10)

%

Books

Cleaning & Collimating

TSMF27

TS-Optics Optical Super Microfiber Cleaning Cloth

TS-Optics Optical Super Microfiber Cleaning Cloth

  • On stock

EUR 5,99RRP EUR 7,95you save 24.7% (EUR 1,96)

%

Customers who bought this product also bought...

Eyepiece-side accessories like Filters
%

Eyepieces
%
%

TSWWA15

TS-Optics SWA 100° Ultra-Series 15 mm 2" Xtreme Wide Angle Eyepiece

TS-Optics SWA 100° Ultra-Series 15 mm 2" Xtreme Wide Angle Eyepiece

  • On stock

EUR 249,00RRP EUR 289,00you save 13.8% (EUR 40,00)

%

TSWWA21

TS-Optics SWA 100° Ultra-Series 21 mm 2" Xtreme Wide Angle Eyepiece

TS-Optics SWA 100° Ultra-Series 21 mm 2" Xtreme Wide Angle Eyepiece

  • On stock

EUR 249,00RRP EUR 289,00you save 13.8% (EUR 40,00)

%

Finder & Accessories

General Accessories

30BGSO

Geoptik TS/GSO Adapter Kit for Push To Kit, suitable for 30B020

Geoptik TS/GSO Adapter Kit for Push To Kit, suitable for 30B020

  • On stock

EUR 62,00RRP EUR 89,00you save 30.3% (EUR 27,00)

%

Transport & Covers
%

Reviews

Written by David Lhomme
on 2021-06-02

*****

Written by Martin Kobza
on 2020-08-21

Sehr gute Verarbeitung. Es gibt nichts zu bemängeln. Auch als Einsteiger kann ich die Deluxe Version definitiv denjenigen empfehlen, die ein hochwertig ausgestattetes 10" Dobson suchen, das noch einigermaßen transportabel ist.

Written by Francis COUMAILLEAU
on 2017-04-05

"Très bon Dosbson Bonne qualité d´image, rotation facile Bon oculaire 30mm"