TS Carbonfibre Newtonian 250 mm f/4 with optimized focus position and UNCN2-G2 Crayford FocuserThe UNC series from Teleskop Service are THE alternative to Newtonians from Far-East but also to high-end, high-cost instruments. All that doesn´t mean that You have to come to a compromise with the materials. UNC stands for Universal Newtonian Telescope with Carbonfibre tube.
- Lightweight but stiff carbon tube "Made in Germany"
- Better field illumination by optimized focus position
- Modified primary mirror holder
- UNCN2-G2 2" Crayford focuser with dual speed
- Modified secondary mirror with optimized offset position
Each Carbonfibre tube is a unique piece and handmade. These are customized products and not a chinese mass product. Little issues on the surface are a proof of the handproduction process. Of course these issues do not affect the telescopes optical performance!
A classical Newtonian is superior to Cassegrain and RC systems in some cases:- faster f/ratio for shorter exposure times
- no elaborate and expensive focal reducers necessary
- absolut no color fringing
- open system for quick cool-down times
- no front corrector plate: no dew problems
A main part at the TS UNC Newtonian is the modern UNCN2-G2 Focuser.Although needing only 50 mm back focus, the UNCN2-G2 accepts heavy cameras without tilting. With this focuser, we have been able to optimize the focus position above the tube for maximum illumination.
- high stiffness at very short built
- large back focus of 60 mm - enough for comon correctors and the TS 9 mm Off Axis Guider
- inculudes precise 1:10 dual speed transmission
- upgradable with focus motor
Delivery contents- TS UNC Carbon Newtonian Telescope with 2" UNCN2-G2 Focuser
- Tube rings made of aluminium with two flat bases
- Vixen Level finderscope holder
- 8x50 finderscope with holder
- Reduction from 2" to 1 1/4" with 2" filterthread
Products specifications
|
Type of telescope
|
Newton |
|
Focal ratio
|
f/4 |
|
Connection to eyepiece
|
2" / with adapter 1 1/4" |
|
Eyepiece adapter
|
To 1 1/4" |
|
Color
|
Black - carbonfibre |
|
Limit value
|
13.8" |
|
Max. useful visual power
|
500 x |
|
Tube material
|
Carbonfibre |
|
Focal length
|
1000 mm |
|
Mirror material
|
BK7 |
|
Viewfinder
|
8 x 50 Viewfinder with bracket |
|
Resolution
|
0.45" |
|
Aperture
|
254 mm |
|
Included accessories
|
Tuberings, Dovetail, Viewfinder, Adapter 2" to 1 1/4" |
|
Backfocus
|
60 mm |
|
Secondary diameter
|
88 mm |
|
Obstruction
|
34.6 % |
|
Illuminated field
|
30.6 mm |
|
Tube weight
|
ca. 25.3 lb |
