Extreme longtime exposures for deepest images and faintest details are a thing of the past! With the 8" f/2.8 astrograph you are able to produce sharper and more detailed images of deepsky objects in a comparable short time. Clear nights are more than rare so start collecting as much data as you can - in all channels.
Carbonfibre Tube: We replace the standard metal tube by an optimized carbonfibre tube. By reducing the telescopes weight, it´s rigidity increases clearly. That is essential for an f/2.8 system.
Better Focuser: The very basic Boren Simon focuser is being replaced by a much more rigid and low profile UNCN2-G2 focuser that carries even higher loads and heavy cameras without flexing problems.
Optimized Focus: Using the low-profile Steeltrack offers the advantage to reduce the focal area down from 165 mm to 131 mm above tube. You`ll receive a much better illumination without focussing problems.
Orion UK Secondary Mirror 75 mm: Instead of the 70 mm standard a 75 mm secondary with Orion 97 % HILUX coating is used. Besides the instrument is optimized with the correct offset.
The Astrograph is an optimized system for being used in combination with DSLR cameras, it fully illuminated a diameter of 25 mm. That is more than most f/4 or f/5 Newtonians and the secondary mirror guarantees a fully illumination of the correctors field lens. The astrographs compressor can easily be replaced by a coma corrector. There won´t occur any problems to reach focus.
Characteristics:
- Optimized system 200mm f/2.8 for photographic use
- Carbon fiber OTA for optimal siffness
- UNCN2-G2 focuser with 1:10 reduction
- 4 element corrector lens system
- Long back focus of 55mm
- Sufficient illumination for APS-C sensors
Delivery:
- 8" f/2.8 Newton Astrograph OTA
- Carbon tube
- 4 element ED reducer / corrector
- Baader Steetrak focuser w/ 1:10 gear
- 8x50 finderscope
- Tube ringsUNCN2-G2
- GP level dovetail
Products specifications
Type of telescope
|
Newton |
Aperture
|
200 mm |
Resolution
|
0.58 arc sec. |
Limit value
|
13.3 mag |
Max. useful visual power
|
400 x |
Color
|
Black - carbonfibre |
Tube material
|
Carbonfibre |
Viewfinder
|
8 x 50 Viewfinder with bracket |
Secondary diameter
|
75 mm |
Obstruction
|
37.5 % |
Focal length
|
568 mm |
Backfocus
|
55 mm |
Illuminated field
|
25 mm |
Connection to eyepiece
|
T2 Thread for Camera |
Tube weight
|
16.7 lb |
Included accessories
|
Tuberings, Dovetail, Viewfinder, Reducer |
Focal ratio
|
f/2.8 |