Bresser Messier NT-203s/800 EXOS-2/EQ5

Bresser Messier NT-203s/800 EXOS-2/EQ5

In the past few years the Bresser Newton telescopes have become the standard workhorse for Deep Sky astrophotography. We now proudly present the second generation of this telescope, the Bresser NT-203s/800 with Hexafoc and fast parabolic main mirror. The Bresser NT-203s/800 f3.9 will deliver you deeper images due to its - compared to 8" f/5 systems - oversized primary mirror and therefore faster optical system with the same exposure time. The big 85 mm secondary prevents vignetting for optimal illumination The excellent 2,5" Hexafoc focuser also does not cause vignetting due to its large diameter and makes focussing a joy - the smoothness and shifting-free operation sets new standards in this price class. This groundbreaking focuser, tube rings with 44mm universal standard dovetail and camera mounting feature and a high-end finderscope with haircross and laser-engraved scale leave nothing to desire even for demanding astrophotographers. The NT-203s/800 Hexafoc has a classical tube construction with an aluminium tube. The focuser can be upgraded with a 10:1 reduction (part No. 0625720) without problems. Also prepared for use with the HR Coma Corrector (part No. 0510330) which eliminates coma, field-curvature and astigmatism.



FEATURES

• Tube without accessories: 8,7 kg - Tube with all accessories mounted: 11,5 kg
• Aperture 203 mm
• Focal length 800 mm
• Focal ratio f/3,9
• Backfocus fully inward focused: 60mm
• 85mm secondary mirror for optimal illumination
• Diffraction limited optics with parabolic main mirror
• Cradle rings with handle and integrated piggyback camera holder (1/4 thread)
• Large knobs for primary and secondary mirror adjustment
• Dovetail plate with stainless steel rail
• Adjustable polar finder scope with optional illumination
• Bubble level for easy tripod setup
• Ball beared axes (RA / DEC) and worm gears for smooth and precise tracking
  
  
  

SCOPE OF DELIVERY

• Telescope tube and EXOS II EQ mount with stainless steel field tripod
• Tube rings with handle and camera mounting feature
• 8x50 Finderscope recticle and true oriented view
• integrated 31.7 mm and T2 adapter
• adapter for 50.8 mm (2")
• mounting ring (for EXOS and LXD-75, EQ-5)
• handle with camera holder
• 8x50 Viewfinder
• adjustable polar finder scope with optional illumination
• 26mmm Super Plössl
• astronomy PC software Stellarium
• rotatable star map

Technical Data

Field of application
Field of application	Deep Sky Observation Deep Sky Photography Lunar observation Planetary observation Planetary photography
Focus group
Focus Group	Advanced Amateurs Visual enthusiasts Specialists and Research
Product family
Product Family	Reflector telescope
OPTICAL SPECIFICATIONS
Optical design	Newtonian Reflector
Magnification from	20
Magnification up to	400
Material Primary mirror	BK-7
Primary mirror diam.	203 mm
Secondary mirror diameter	85 mm
Mirror/Lens diam.	203 mm
Focal length	800 mm
Aperture ratio	3.9
Angular resolution	0.56 arc seconds
Finderscope	8 x 50 mm
Mount Type	German/Equatorial Mount
GENERAL TECHNICAL DATA
Material OTA	Aluminium
Polefinder scope	included, illumination optional
Bearing in alt-azimuth / RA	2 ball bearings
Bearing in elevation / DEC	2 ball bearings
Material tripod	Stainless Steel
Focusing system	2.5" Hexafoc
Ext. warranty after online registration*	10 Years
DIMENSIONS & WEIGHTS
Net weight OTA (incl. accessories)	11.5 kg
Total length	100 cm
Total width	100 cm
Total height	175 cm
Tube diameter	235 mm
Tube length	700 mm
Net Weight total (incl. accessories)	30.5 kg
Net weight mount (incl. accessories)	19 kg
Counterweight	9 kg
Eyepiece Barrel Diameter	50.8 mm