TS-Optics 12" f/5 UNC Newtonian Telescope - Carbon Tube - made in Germany

TS UNC Newtonian advantages:

Three focus positions possible:

The TS UNCN2-G2 focuser:

Primary mirror fan for faster cool-down time:

Parabolic primary mirror:

Every single TS Carbon Imaging Newtonian is star tested on our optical bench before shipping:

Assembly and collimation instructions

General product video

The new TS Carbon Imaging Newtonian series - a comparison with standard "far east Newtonians":

Meanwhile there´s a great number of Chinese Newtonian telescope that´s claimed as "ready for astro photography". But such telescopes are mass production and therefore in some cases a compromise.

Their main problems:
- high amount of obstruction cause seeing problems because more light energy is distributet into the diffraction rings. Thus resulting to larger
  star diameters and less image definition. A too small secondary, on the other hand, leads to less field illumination.

- Too less free aperture due to a too small tube. The result is an increasing amount of off-axis vignetting.

- Focuser drawtubes reach into the telescope causing reflections.

- Too long focusers need a focal plane far outside the tube resulting in vignetting or the need of large secondaries and focusers.

Newtonian telescopes without compromises are normally something for ATM or specialized manufacturers with high prices. Our aim is to offer optimized Newtonian telescopes with the option to fulfil individual demands. The main task of TS Carbon Imaging Newtonians is astro photography with a minimum of vignetting and a minimum of obstruction at the same time.

The background: After many years of own experience in astro photography, we know how far obstruction influences the image definition. Telescopes with small obstruction (less than 30%) show significantly less seeing influence in deep-sky images. The effective resolution - important for lunar and planetary imaging - becomes better, too.

Our new TS Carbon Imaging Newtionan series are the result of these considerations:
A carbon tube has nearly no thermal expansion and therefore nearly no focus drift. We use the TS UNCN2 focuser because it is one of the shortest precision focuser available. A dedicated motor drive is available. With our optimized focus position, 2" are sufficient.
We offer different focus positions above the tube:
1.: 90-100 mm. Allows good field illumination even with small secondary mirrors. With a 70mm secondary, the 10" model has a 100% field
     diameter of 17 mm. On the other hand, DSLR cameras can be used only in combination with the TeleVue Paracorr.
2.: 110 mm. The compromise position for standard applications.
3.: 131 mm: Necessary if the ASA 0.7x reducer/corrector is planned for photography.
4.: Individual position. We manufacture the telecope according to your needs.

Individual size of the secondary mirror
According to the sensor size and the individual applications, you may want a special secondary mirror diameter. After we know the position of the focal plane, we can calculate the necessary size of the secondary mirror. Minor axis diameters of 50, 63, 70, 88 and 100 mm are possible and also intermediate sizes for a special price.

We can fulfil your individual ideas by assembling an optimized telescope for you, e.g.:
- a planetary Newtonian with minimized secondary
- an Allrounder for a wide field of use
- a photo Newtonian with exceptional field illumination for your sensor size
- fast astro cameras with f/3.5 reducer/corrector

Please feel free to drop us an email for further recommendations: info@teleskop-service.de