203 mm F3.9 newtonian reflector telescope
- High quality photo Newton
- 85 mm secondary mirror for a perfect illumination of the image field
- High light intensity at F3.9
- 2.5" Hexagon Focuser
- Elaborate 6-point mirror bearing
- Prepared for HR Coma Corrector (Art.Nr.0510330).
- Large knurled screws for adjusting the primary and secondary mirrors
- Telescope for night and solar observation.
- Handle with integrated camera holder
- With solar filter lens and smart phone adapter for navigation
ThebRESSER Messier Newtonian telescopesHave also established themselves as reliable workhorses for astrophotography in recent years.With the newMessier NT203s/800 with HexafocWe can now present a new generation of these devices.Photo Newtonians with aparabolic primary mirrorWith itsfast opening ratio203 mm (8") f/3.9 lens allows for deeper images with the same exposure time. The large85 mm secondary mirrorEnsures optimum illumination of the image field. The 2.5" high quality Hexafoc focuser providestrouble-free, vignette-free photography, the high quality of this high-quality device is rounded off by tube rings with 44 mm universal dovetail rail and carrying handle with mounting option for a camera, as well as an excellent, bright viewfinder with reticle.The focuser can be easily adapted with a10:1 reduction(item no. 0625720).The HR comma correctorOptional(item no. 0510330) can be used to obtain accurate stellar images.It is designed for visual and photographic use and significantly optimizes image performance, especially in the peripheral areas of the image field.
Please note that reflecting telescopes of the typeNewtonAre very good for astronomical observations of the starry sky, but are not suitable for nature and landscape observations during the day.Therefore, we recommend BRESSER lens telescopes for nature and landscape observation.
PROPERTIES
- Aluminum tube without tube clamps/seeker/ocular: 8.7 kg
- Tube with complete accessories included: 11.50 kg
- Opening 203mm
- Focal length 800 mm
- Focus 100 mm on the ocular focuser
- Aperture ratio f/3.9
- Large secondary mirror with a diameter of 85mm
- Limited motion optics with parabolic primary mirror
- Large knurled screws for calibrating the primary and secondary mirror
DELIVERY CONTENTS
- Aluminum tube with optics
- Solar filter
- Close pipe clamps and camera clamping option
- Prism rails with stainless steel mounting surface (44 mm universal dovetail for GP/EQ5/LXD75)
- Searcher 8x50
- 26mm Super Plössl
- 50.8mm (2'') eyepiece socket and 30.7mm (1.25'') adapter with T2 thread connection
Technical specifications
| APPLICATION AREA |
| Application area |
- Deep sky observation
- Deep sky photography
- lunar observation
- photography of the moon
- planetary observation
- planetary photography
- solar observation
|
| TARGET GROUP |
| target group |
- advanced
- visual observers
- specialists and research
|
| PRODUCT FAMILY |
| product family |
reflector telescope |
| OPTICAL CHARACTERISTICS |
| optical design |
newtonian reflector telescope |
| Expansion of |
20 |
| Maximum recommended magnification |
400 |
| secondary mirror diameter |
85 mm |
| Mirror/lens diameter. |
203 mm |
| focal length |
800 mm |
| resolving power |
0.56 seconds of arc |
| search engine |
8x50mm |
| Wide field of view in 35 mm 24x36 mm format (°) |
2.5 |
| Height of the image field in 35 mm format 24x36 mm (°) |
1.7 |
| GENERAL TECHNICAL DATA |
| material tube |
aluminum |
| Color |
White |
| Eyepiece mounting cap diameter |
50.8 mm |
| dust cap |
for mirror and eyepiece sleeve opening |
| Type of mounting |
Frameless optics |
| Extended warranty |
ten years |
| DIMENSIONS AND WEIGHTS |
| Net weight of optical tube (including accessories) |
8.7 kg |
| tube diameter |
235 mm |
| tube length |
700 mm |
| Net weight assembly (incl. accessories) |
11.5 kg |
