The Omegon Advanced X 203/1200 is a bright 8-inch telescope for those who want to see more: bright nebulae, detailed planetary disks, textured galaxies. Thanks to its large mirror (203 mm), fast f/5 aperture ratio and parabolic design, this Dobson delivers stunning images - even in locations with some light pollution.
Cooling fan with battery holder
The telescope is equipped with a quiet fan behind the main mirror. This fan accelerates the cooling of the mirror to the outside temperature, providing faster thermal stabilization and therefore clearer images with less air vibration in the tube. The fan is battery operated via the included holder and can be easily turned on or off.
Accurate 1.25″ focuser
The robust focuser makes focusing smooth and precise, even at high magnifications. The integrated 6×30 viewfinder helps you quickly find objects in the night sky.
Smart balance system with spring construction
The spring ensures stable, balanced elevation movement. This keeps the telescope perfectly balanced, even with heavier eyepieces.
What we recommend
- Moon & planets: ✓ impressive details at high magnifications
- Nebulae & galaxies: ✓ excellent contrast and brightness
- Nature observation: ✗ not suitable
- Astrophotography: ✗ visual design, photography not recommended
- Sun Observation: ✗ only with appropriate sunscreens
- For Beginners: ✓ very suitable as a powerful first telescope
- For advanced students: ✓ also loved by experienced observers
Technical specifications
Optics and performance
- Type: Reflector (Newton)
- Aperture: 203 mm
- Focal length: 1000 mm
- Aperture ratio: f/5
- Resolution: 0.57″
- Limit magnitude: 13.3 mag
- Max. usable magnification: 400x
- Light output: 820× relative to the naked eye
- Mirror coating: Aluminum + SiO₂ (94% reflection)
- Main mirror: Parabolic
- Front mirror: ~50 mm (unspecified, but plausible)
- Catch mirror obstruction: ~25% (estimated)
Focuser
- Type: Crayford
- Connection: 1.25″
- Adjustment range: 48 mm
- Back focus: 50 mm
- Camera thread: T2 (internal)
Mount
- Type: Dobson (azimuthal)
- Material: Wooden rocker box
- Weight of tube: ±10 kg
- Rocker box weight: ±9 kg
- Total weight: ±19 kg
- No GoTo - manual steering
Dimensions
- Length of tube: ±1000 mm
- Height of eyepiece position (zenith): ±1200 mm
- Rocker box width: ±500 mm
Included accessories
- Eyepiece: 25 mm Plössl (1.25″)
- Viewfinder: 6×30 optical
- Accessory tray in the mount
- Fan under the main mirror (battery powered)
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