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
- Large 85mm secondary mirror
- Elaborate 6 point flotation system for mirror support
- Large knobs for primary and secondary mirror adjustment
- Equat. EXOS-2 mount with a max. load of 13 kg
- Solid stainless steel field tripod for maximum rigidity
- Precision mount with ball bearings in all axis and adjustable polar finder scope with optional illumination
- GoTo motors + Startracker optional (part no. 4951750)
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.
Mount and Tripod. The BRESSER EXOS 2 is a rugged mount with high rigidity and precision tracking for visual observation and astrophotography. The tripod is extremely rigid to suppress vibrations really well. This model is very well machined and has an illuminated polar finder scope and precise graduated circles. A powered twoaxis control (BRESSER Exos Duo) or a GoTo-Kit is available as an optional extra. The BRESSER EXOS 2 can take the weight - depending on length and use of up to 13 kg. This allows you to use refractors of up to 152 mm aperture and mirror telescopes of up to 203 mm aperture.
FEATURES
Mount and Tripod. The BRESSER EXOS 2 is a rugged mount with high rigidity and precision tracking for visual observation and astrophotography. The tripod is extremely rigid to suppress vibrations really well. This model is very well machined and has an illuminated polar finder scope and precise graduated circles. A powered twoaxis control (BRESSER Exos Duo) or a GoTo-Kit is available as an optional extra. The BRESSER EXOS 2 can take the weight - depending on length and use of up to 13 kg. This allows you to use refractors of up to 152 mm aperture and mirror telescopes of up to 203 mm aperture.
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
- 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
- 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
- Telescope book
- rotatable star map
Additional technical data
- Backfocus fully inward focused: 60mm
Technical Data
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Field of application |
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Focus Group |
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Product Family | Reflector telescope |
Optical design | Newtonian Reflector |
Magnification from | 20 |
Magnification up to | 400 |
Material Primary mirror | BK-7 |
Primary mirror diameter | 203 mm |
Secondary mirror diameter | 85 mm |
Objective diameter | 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 |
Material OTA | Aluminium |
Polefinder scope | included, illumination optional |
Bearing in alt-azimuth / RA | 2 ball bearings |
Bearing in elevation / DEC | 2 ball bearings |
Material tripod3 | Stainless Steel |
Focusing system | 2.5" Hexafoc |
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 |