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Bresser N 203/800 Messier NT 203S Hexafoc GoTo
With dual-axis GoTo movement, the Bresser N 203/800 Messier NT 203S Hexafoc GoTo combines a fast 203mm Newtonian reflector with 800mm focal length and StarTracker control.
- 203mm mirror supports listed deep-sky imaging
- 800mm focal length uses f/3.9 optics
- EXOS-2 mount provides dual-axis GoTo movement
- StarTracker controller manages automated tracking
- 12V DC power uses 8x D-cell batteries
- 8×50 illuminated finder and tripod included
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Description
Use automated coordinates to navigate wide deep-sky fields with the Bresser N 203/800 Messier NT 203S Hexafoc GoTo, a fast 203 mm Newtonian reflector featuring an 800 mm focal length and listed f/3.9 optical ratio. Its EXOS-2 German equatorial GoTo mount provides motorized movement with a StarTracker hand controller, while the 2.5-inch Hexafoc focuser, 8×50 finder, large secondary mirror, stainless steel tripod, camera holder, and counterweights support the complete photo-visual system.
The verified manufacturer configuration includes an aluminum tube, parabolic primary mirror, 85 mm secondary mirror, 60 mm inward backfocus, six-point flotation mirror support, 2.5-inch Hexafoc focuser, 8×50 finder with reticle, smartphone adapter, aperture solar filter, integrated T2 and 1.25-inch adapter, camera holder, stainless steel dovetail rail, EXOS-2 GoTo mount, StarTracker handbox, and two 4.5 kg counterweights.
Key Features of Bresser N 203/800 Messier NT 203S Hexafoc GoTo
This fast GoTo telescope combines a large 203 mm Newtonian aperture with an 800 mm focal length, 2.5-inch Hexafoc focusing, oversized secondary mirror, motorized German equatorial control, StarTracker navigation, camera mounting features, and supplied accessories for deep-sky observation and supported astrophotography applications.
- 203 mm parabolic Newtonian reflector
- 800 mm focal length with listed f/3.9 optical ratio
- EXOS-2 German equatorial GoTo mount
- Motorized RA and DEC movement
- 2.5-inch Hexafoc focuser
- 85 mm secondary mirror
- 8×50 illuminated optical finder
- Two 4.5 kg counterweights and stainless steel tripod
Automated Fast-System Deep-Sky Tracking
The supplied application focuses on automated object location and motorized tracking across galaxies, nebulae, star clusters, lunar targets, and planets, with the fast f/3.9 optical configuration supporting broad photo-visual fields while the StarTracker system provides electronic positioning after alignment and the mount provides an ST-4 compatible autoguider interface.
Included Accessories
The verified package includes the optical tube, EXOS-2 GoTo mount, StarTracker hand controller, stainless steel tripod, 26 mm Super Plossl eyepiece, 8×50 finder, aperture solar filter, smartphone adapter, Stellarium software, integrated adapters, camera holder, stainless steel dovetail rail, tube rings, and two 4.5 kg counterweights for the complete telescope system.
- 26 mm Super Plossl eyepiece and integrated adapter system
- StarTracker controller, EXOS-2 GoTo mount, and stainless steel tripod
- 8×50 finder, solar filter, smartphone adapter, software, camera holder, and counterweights
Bresser Warranty and Support
The supplied product information lists a 2-year factory warranty, while current manufacturer listings may provide separate extended-warranty information, so buyers should confirm the applicable US warranty duration, electronics coverage, optical coverage, mount support, camera-related accessories, registration requirements, and authorized service terms before ordering this fast GoTo telescope system.
Bresser N 203/800 Messier NT 203S Hexafoc GoTo Specs
| Brand | Bresser |
| Full Model Code | Bresser Messier NT-203S/800 EXOS-2 GoTo |
| Country of Origin | Germany |
| Optical Design | Newtonian Reflector (Fast Photo-Visual Format) |
| Aperture | 203 mm (8.0 inches) |
| Focal Length | 800 mm |
| Focal Ratio | f/3.9 |
| Optical Coatings | High-Reflective Aluminum Coating with Quartz Protective Layer |
| Secondary Mirror Obstruction | 70 mm |
| Secondary Mirror Obstruction by Area | 11.9% |
| Backfocus Distance | 85 mm |
| Resolving Power | 0.57 Arcseconds |
| Limiting Visual Magnitude | 13.5 |
| Highest Useful Magnification | 400x |
| Lowest Useful Magnification | 29x |
| Optical Tube Material | Steel |
| Focuser Style & Mechanism | 2.5-inch Hexafoc Heavy-Duty Rack and Pinion Focuser (with Dual-Speed 10:1 Micro-Focusing Mechanism) |
| Mirror Lock Mechanism | No |
| Optical Tube Dimensions | 250 mm x 740 mm |
| Optical Tube Weight | 11.5 kg (25.35 lbs) - Tube Only |
| Mount Attachment Type | EXOS-2 German Equatorial Mount with StarTracker GoTo System (Dual-Axis Motorized) |
| Finder Scope Specification | 8x50 Illuminated Optical Finder Scope |
| Included Accessories | 26mm Super Plossl Eyepiece (31x), 1.25-inch Eyepiece Adapter, EXOS-2 Equatorial Mount, Stainless Steel Field Tripod, StarTracker Hand Controller, Counterweights (2x 4.5kg), Tube Rings with Vixen-Style Dovetail Plate |
| Power Requirements | 12V DC via 8x D-Cell batteries or optional external AC-DC adapter |
| Standard Warranty | 2-Year Factory Warranty |
| Application | Automated motorized object tracking and fast deep-sky cartography, combining an ultra-fast f/3.9 light-gathering parabolic mirror with a motorized coordinate tracking frame. |
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