Bresser Telescope N 203/800 Messier NT 203S Hexafoc OTA (53317)

The traditional company Bresser offers telescopes under the Messier brand, providing an excellent price-performance ratio for ambitious beginners. These Messier telescope systems are expandable and retrofittable, making them suitable for use well beyond the initial entry point.

NT203s/800 Optics
The Newtonian telescopes in the Messier series have proven themselves as reliable tools for astrophotography. With the new Messier NT203s/800, the series has been further improved to meet the needs of astrophotographers.

• The fast aperture ratio of f/3.9 allows for deeper exposures with shorter exposure times.

• The large secondary mirror ensures optimal field illumination.

• The high-quality 2.5" Hexafoc focuser provides vignetting-free photography.

• A 6-point main mirror bracket ensures stability and precision.

• Large adjustment screws for both primary and secondary mirrors make collimation easier.

This telescope features tube clamps with a 44 mm dovetail rail, a carrying handle with a mounting option for a camera, and a bright viewfinder with crosshairs, making it versatile and user-friendly.

Specifications

Optics:

• Type: Reflector

• Build: Newtonian

• Aperture: 203 mm

• Focal length: 800 mm

• Aperture ratio (f/): 3.9

• Resolving capacity: 0.57 arcseconds

• Limiting magnitude: 13.3 mag

• Light gathering capacity: 840x (compared to the human eye)

• Maximum useful magnification: 406x

• Tube weight: 8.7 kg

• Tube material: Aluminum

• Tube length: 700 mm

• Tube diameter: 235 mm

• Tube construction: Full tube

Reflector Features:

• Secondary mirror diameter: 85 mm

• Main mirror construction: Parabolic

• Primary mirror material: BK7 glass

• Adjustable mirrors: Yes

• Ventilation for central mirror: No

Focuser:

• Type of build: Hexafoc

• Eyepiece connection size: 2"

• Free aperture: 64 mm

• Gear reduction: Without

• Telescope-side connection thread: T2 thread

• Backfocus distance: 60 mm

Mount Features:

• Mounting type: None (OTA only)

• GoTo control included? No

Included Accessories:

• SP eyepiece (26 mm, 1.25")

• Finder scope (8x50)

• Tube clamps included

• Eyepiece adapter for both 2" and 1.25" eyepieces

• Vixen-style prism rail included

• Solar filters included

General Information and Applications:
The Messier NT203s/800 is part of Bresser’s Messier series and is ideal for observing the Moon, planets, nebulae, galaxies, and the Sun (with appropriate solar filters). It is also highly suitable for astrophotography but not recommended for nature observation or permanent observatory setups.

Additional Details:
This telescope is designed for advanced users but is not recommended for beginners or observatories.