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BRESSER - 203 mm f/3.9 Newtonian telescope (optics only)

4007922152035

New product

  • Fotonewtonian f/3.9 with 2.5" Hexafoc
  • Aperture: 203 mm; Focal Length: 800 mm f/3.9; large 85 mm secondary mirror
  • Excellent 2.5" Hexafoc Focuser with possibility to upgrade to a 10:1 reduction
  • Ready for the HR Coma Corrector (part No. 0510330)
  • Scope of delivery: OTA + Finder + Tuberings + SPL26 mm
  • Elaborate 6 point flotation system for mirror support
  • Universal 44 mm Dovetail plate with stainless steel rail (fits LXD75/Great Polaris/EQ5)
  • Telescope for night and solar observation
  • Cradle rings with handle and camera holder included
  • Aperture Solar-filter and smartphone adapter for celestial navigation included

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Product information "BRESSER Messier NT203s/800 Optical Tube"
NEW – now including a high-quality aperture Solar-filter for safe observation of sunspots, eclipses and planet transits. Great telescope for night and solar observation.

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 a 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. Ready to use with the  HR Coma Corrector (part No. 0510330) which eliminates coma, field-curvature and astigmatism.
Please note: Reflector telescopes with optical design Newton are very good for astronomical observing at the starry night sky. But these telescopes are not well usable for observing landscape and nature during daylight. Therefore we suggest BRESSER refractor (lens) telescopes for landscape and nature observing.

CHARCTERISTICS
  • Optical design: reflector telescope
  • Mirror diameter: 203 mm / focal length: 800 mm / F/3.9
  • Maximum recommended magnification: 406x
  • Telescope for night and solar observing
  • Very high quality Hexafoc focuser with 2.5" free inner diameter
  • Diffraction limited optics with parabolic main mirror
  • 8x50 straight through viewfinder with reticle
  • Optimized finder socket for comfortable use
  • Cradle rings with handle and integrated piggyback camera holder (1/4 thread)
  • Smartphone adapter for celestial navigation included
  • Dovetail plate with stainless steel rail
  • Can be connected to SLR cameras (optional T2 ring required)
  • 50.8mm (2) to 31.7mm (1.25) adapter with integrated T2 thread (T2-adapter ring for your camera is needed)
  • Aperture 203 mm
  • Focal length 800 mm
  • Focal ratio f/3.9
  • Backfocus fully inward focused: 100 mm
  • 85 mm secondary mirror for optimal illumination
  • Large knobs for primary and secondary mirror adjustment
  • Tube without accessories: 8.7 kg - Tube with all accessories mounted: 11.5 kg
SCOPE OF DELIVERY
  • Optical tube
  • 26 mm Super Plössl eyepiece 31,7 mm (1.25")
  • Integrated 31,7 mm and T2 adapter
  • Prism rail with stainless steel clamping surface
  • Adapter for 50.8 mm (2") eyepieces
  • 8x50 optical viewfinder
  • Rotatable star map
  • Aperture solar filter
  • Tube clamp with handle and camera holder
  • Smartphone adapter for celestial navigation
  • Software Stellarium (via download)
Angular resolution (arc seconds): 0.56
Batteries included: 0
Batteries required: 0
Colour: white
Compass: 0
Dust protection caps: Dust protection caps for open aperture and eyepiece holder
ED glass: 0
Extended warranty (years): 10
Eyepiece Barrel Diameter (mm): 50.8
Field of application [Telescopes]: Deep Sky Observation, Deep Sky Photography, Lunar observation, Lunar photography, Planetary observation, Planetary photography, Solar observation
Finderscope: 8 x 50 mm
Focal length (mm): 800
Focus Group [Telescopes]: Advanced Amateurs, Specialists and Research, Visual enthusiasts
Focusing system: 2.5" Hexafoc
Height of image field width 24x36 mm receiver (degrees): 1.7
Magnification from: 20
Material: Aluminium
Material OTA: Aluminium
Maximum recommended magnification: 400
Mirror/Lens diam. (mm): 203
Mount Type [Telescopes]: Optics without Mount
Net weight OTA (incl. accessories) (kg): 8.7
Net weight mount (incl. accessories) (kg): 11.5
Optical design: Newtonian Reflector
Power supply unit included: 0
Product Family [Telescopes]: Reflector telescope
Reticle: 0
Secondary mirror diameter (mm): 85
Tripod height adjustment: 0
Tube diameter (mm): 235
Tube length (mm): 700
Width of image field width 24x36 mm receiver (degrees): 2.5

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BRESSER -  203 mm f/3.9 Newtonian telescope (optics only)

BRESSER - 203 mm f/3.9 Newtonian telescope (optics only)

  • Fotonewtonian f/3.9 with 2.5" Hexafoc
  • Aperture: 203 mm; Focal Length: 800 mm f/3.9; large 85 mm secondary mirror
  • Excellent 2.5" Hexafoc Focuser with possibility to upgrade to a 10:1 reduction
  • Ready for the HR Coma Corrector (part No. 0510330)
  • Scope of delivery: OTA + Finder + Tuberings + SPL26 mm
  • Elaborate 6 point flotation system for mirror support
  • Universal 44 mm Dovetail plate with stainless steel rail (fits LXD75/Great Polaris/EQ5)
  • Telescope for night and solar observation
  • Cradle rings with handle and camera holder included
  • Aperture Solar-filter and smartphone adapter for celestial navigation included