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Telescopes > GSO > GSO N 250/1250 deluxe Dobsonian telescope
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Product no.: 23750

N 250/1250 deluxe Dobsonian telescope

$ 980.00 incl. VAT, plus shipping costs
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Product description

Powerful and transportable GSD 880 Dobsonian with 10" aperture and 1250mm focal length

The ideal telescope for observing deep sky objects. The tube will still fit on your car’s back seat.

The advantages at a glance:

  • Quality GSO mirror with 94% reflection for a brighter image
  • Robust metal tube with very good adjustment stability
  • 2" Crayford focuser with 1:10 micro-reduction for precise focusing
  • Primary mirror ventilation for fast optical cooling
  • New and innovative friction storage for height adjustment using adjustable resistance
  • Ball bearing mounted horizontal adjustment for effortless adjustment and object tracking
  • Extensive features, such as 2" 30mm panoramic view eyepiece, 8x50 viewfinder and 9mm Super Pl�ssl

Have more fun observing with a quality telescope from GSO. Observe the largest hurricane system known to man - the Great Red Spot on Jupiter. Observe the rings of Saturn and spot the Cassini division - which will give you some idea of ​​the actual structure of Saturn's rings. Delight in the light gathering power of this high-quality parabolic mirror telescope, which even allows you to make out the spiral arms of galaxies or wisps of nebula in stellar nurseries.

Observing success is possible from the very first night, as the manufacturer has not only equipped the GS680 with a first class, diffraction-limited, optical system, but also with sound mechanics. That is why this telescope is also very suitable for beginners. It is also very simple to use. The high quality GSO optics can of course also deal with the highest range of magnifications, ensuring excellent performance when observing the Moon and planets. Enjoy high-resolution observing, limited only in practice by the current 'seeing' conditions.

GSO 2" Crayford focuser - the focuser is clearly superior to simple rack and pinion focusers.

  • no 'wobbling' when focusing (image shift)
  • can take heavier loads - up to 3kg
  • 1:10 micro-reduction for more accurate focusing
  • compression ring clamp for 2" and 1.25" accessories, ensuring a safe grip and precise alignment along the optical axis

GSO Dobsonian elevation axis bearings - a new and more effective solution has been found for the elevation. A robust steel axle carries the entire weight of the OTA. Moving the elevation setting takes place on two CNC-machined faces - ensuring precision and no lateral slip. In addition, you can adjust the resistance via a large thumbscrew on each side - from ultra-light to stiff. This allows you to stop the instrument moving around in high winds for example.

Setting up the counterweights - you can precisely adjust the balance of the Dobsonian. If you want to swap a 8x50 finder scope for using a much lighter red dot finder, or if you want to use a heavy bino-viewer in place of a lighter eyepiece, then no problem! - simply adjust the position of the elevation bearing wheel in the rocker box - a precise scale ensures that you can set each side to the same position.

Roller bearings for horizontal adjustment - the simple Teflon bearings, used previously for this by the manufacturer, could cause severe maladjustment, and when the telescope was directed toward the zenith, the adjustment lever was so badly placed that fine adjustment was almost impossible.

The modern industrial roller-bearings now employed allow precision adjustment. The bearings have upper and lower metal plates which prevent any scoring of the soft laminate and ensure adjustment remains smooth, even after many years of use.

It not only matters which telescope you buy but also where you buy it. Our additional services:

  • We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
  • We provide a copy of the 80-page "Telescope ABC" beginners handbook with every telescope.

Our expert comment:

My tip: You can get this telescope for a better price with the special radiant finder (Telrad) and an especially high quality SWA eyepiece: Omegon Dobson telescope ProDob N 254/1250 Radiant.

The Rockerbox design has also been improved for the Omegon version.

(Stefan Taube)

Specifications

Optics


Type
Reflector
Type of build
Newton
Aperture (mm)
250
Focal length (mm)
1250
Aperture ratio (f/)
5
Resolving capacity
0,46
Limit value (mag)
13,8
Light gathering capacity
1280
Max. useful magnification
500
Tube construction
Full tube
Tube weight (kg)
15,5
Tube length (mm)
1210

Reflector


Ventilation for central mirror
yes
Primary mirror - Material
BK7
Main mirror´s construction
parabolic
Secondary mirror obstruction
25
reflectivity
94
Adjustable
yes
Secondary Mirror Heating
no
secondary mirror design
Plan

Focuser


Type of build
Crayford
Connection ( to eyepiece)
2
Gear reduction
1:10 fine focusing

Mount


Type of build
Dobson
Mounting type
Dobson
GoTo control
no

Tripod


Material
Wood
Type
Rockerbox

Included accessories


1.25'' eyepieces
9mm
Finder scope
8x50
Eyepiece adaptor
1,25" - 2"
2'' eyepieces
30mm

Area of application


Moon & Planets
yes
Nebulae & galaxies
yes
Nature Observation
no
Astrophotography
not recommended
Sun
not recommended (Only with appropriate Sun filter)

Recommended for


Beginners
yes
Advanced
yes
Observatories
no

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*All prices include VAT plus shipping costs.

GSO N 250/1250 deluxe Dobsonian telescope
GSO N 250/1250 deluxe Dobsonian telescope
GSO N 250/1250 deluxe Dobsonian telescope
GSO N 250/1250 deluxe Dobsonian telescope

Customer reviews

Excellent

Review by T. F. on 05.05.2022 14:19:44

( 5 / 5 )

I bought this amazing Dobsonian and here you have 5 reasons to buy it: https://youtu.be/oj9TnVu_vAA

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