product description
- Fotonewtonian f/3.9 with 2,5" Hexafoc
- Aperture: 203mm; Focal Length: 800mm f/3.9
- 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 + SPL26mm
- Large 85mm secondary mirror
- Elaborate 6 point flotation system for mirror support
- Universal 44mm Dovetail plate with stainless steel rail (fits LXD75/Great Polaris/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 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.
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
- 85mm secondary mirror for optimal illumination
- Diffraction limited optics with parabolic main mirror
- Large knobs for primary and secondary mirror adjustment
- Aluminium tube with optics
- Tube rings with handle and camera mounting feature
- 8x50 Finderscope with recticle
- 26mmm Super Plössl
Additional technical data
- Backfocus fully inward focused: 60mm
Technical Data
FIELD OF APPLICATION CUSTOM_ATTRIBUTE_CATEGORY_TITLE_FOCUSGROUP OPTICAL SPECIFICATIONS GENERAL TECHNICAL DATA CUSTOM_ATTRIBUTE_CATEGORY_TITLE_MASSES Field of application - Deep Sky Observation
- Deep Sky Photography
- Lunar observation
- Lunar photography
- Planetary observation
- Planetary photography
Focus Group - Advanced Amateurs
- Visual enthusiasts
- Specialists and Research
Optical design Newtonian Reflector Magnification from 20 Maximum recommended magnification 400 Primary mirror diameter 203 mm Secondary mirror diameter 85 mm Focal length 800 mm Angular resolution 0.56 arc seconds Finderscope 8 x 50 mm Width of image field width 24x36 mm receiver 2.5 degrees Height of image field width 24x36 mm receiver 1.7 degrees Mount Type Optics without Mount Material OTA Aluminium Focusing system 2.5" Hexafoc Colour white Dust protection caps Dust protection caps for open aperture and eyepiece holder Net weight OTA (incl. accessories) 8.7 kg Tube diameter 235 mm Tube length 700 mm Net weight mount (incl. accessories) 11.5 kg Eyepiece Barrel Diameter 50.8 mm
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