Omegon Dobson Telescope Advanced X N 203/1000
The Omegon Advanced X 203/1000 is a powerful 8-inch telescope for those who want to see more: bright nebulae, detailed planetary disks, galaxies with structure. Thanks to its large mirror (203 mm), fast f/5 aperture ratio and parabolic design, this Dobsonian delivers stunning images – even in locations with some light pollution.
✓ 203 mm aperture – captures 78% more light than a 152 mm mirror
✓ Parabolic primary mirror with 94% reflection coating
✓ F/5 focal ratio – ideal for wide deep-sky fields
✓ Crayford focuser with T2 thread and 1.25″ connection
✓ Simple Dobsonian mount – stable, intuitive and quick to set up
The included rocker box rotates smoothly thanks to Teflon bearings and features tension springs for vertical control. The fan under the primary mirror helps quickly bring the telescope to temperature, allowing you to start observing sooner.
Technical Specifications
Optics and performance
- Type: Reflector (Newton)
- Aperture: 203 mm
- Focal length: 1000 mm
- Focal ratio: f/5
- Resolution: 0.57″
- Limiting magnitude: 13.3 mag
- Maximum usable magnification: 400x
- Light gathering: 820× compared to naked eye
- Mirror coating: Aluminum + SiO₂ (94% reflection)
- Primary mirror: Parabolic
- Secondary mirror: ~50 mm (not specified, but likely)
- Secondary obstruction: ~25% (estimated)
Focuser
- Type: Crayford
- Connection: 1.25″
- Adjustment range: 48 mm
- Back focus: 50 mm
- Camera thread: T2 (internal)
Mount
- Type: Dobsonian (azimuthal)
- Material: Wooden rocker box
- Tube weight: ±10 kg
- Rocker box weight: ±9 kg
- Total weight: ±19 kg
- No GoTo – manual control
Dimensions
- Tube length: ±1000 mm
- Eyepiece height (zenith): ±1200 mm
- Rocker box width: ±500 mm
Included Accessories
- Eyepiece: 25 mm Plössl (1.25″)
- Finder: 6×30 optical
- Accessory tray in mount
- Fan under primary mirror (battery-powered)
Application
- Moon planets: ✓ impressive details at high magnifications
- Nebulae galaxies: ✓ excellent contrast and brightness
- Nature observation: ✗ not suitable
- Astrophotography: ✗ visual design, photography not recommended
- Solar observation: ✗ only with appropriate solar filters
- For beginners: ✓ very suitable as powerful first telescope
- For advanced users: ✓ also popular among experienced observers
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