TS-Optics 8" f/4 UNC Newtonian Telescope with Fused Quartz Main Mirror and Carbon Tube

The UNC Newton series from Teleskop-Service offers an alternative to the Far East Newtons

With these telescopes you do not have to make any compromises. UNC stands for Universal Newton Telescopes with carbon tube. Each UNC Newton is individually manufactured for you and optimized according to your wishes - a telescope Made in Germany!.

The 8" f/4 UNC Newtonian is a transportable telescope for astrophotography. The fast focal ratio f/4 allows very deep galaxy and nebular images with short exposure times. We suggest the well known Skywatcher EQ5 or the very stable Celestron Advanced VX as mount for this telescope.

TS UNC Newtonian advantages:

♦ High quality carbon fibre tube, individually manufactured in Germany
♦ Optimized focus position according to customer´s demands for best field illumination
♦ Main and secondary mirror cell improved by Teleskop-Service
♦ Mirror substrate is fused quartz (thermal properties similar to Zerodur)
♦ Easy collimation without tools
♦ Blackened secondary mirror edges
♦ TS UNCN2 2" Crayford focuser - one of the best systems in its class
♦ Secondary mounted with correct offset
♦ Diffraction limited system


Anti reflex painting for maximized contrast

For our UNC Newtons the TS "Black" anti-reflective paint is used. It darkens the tube interior just as well as velour foil. The big advantage besides a lower weight is that the paint hardly attracts dust. The optics remain clean. With velour film, dust collects very quickly at the main mirror.

The picture on the left shows how dark the anti-reflective color appears. The diagram (above) shows a direct comparison between blackboard paint and antireflection paint.

Focus position optimized for astrophotography:

The focus point is 60 mm above the 2" receptacle with the focuser retracted. This position is optimal for all coma correctors with 55 mm working distance, such as the Baader MPCC corrector, the TS Coma Corrector or the GPU corrector. You can also use the 2" Paracorr. For visual observation you need a 2" extension tube - item # TSV235.

The 2" TS UNCN2 Crayford focuser:

A core piece of the TS UNC Newtonians is the modern TS UNCN2 focuser. The focuser extends only 50 mm from the edge of the tube and still carries heavy cameras and accessories without tilting.

♦ High rigidity with extremely short overall length
♦ exact 1:10 dual-speed reduction - with it perfectly focused astrophotographs are possible
♦ Upgradable with motor focus - with the TS motor focus advantage: manual adjustment possible with attached focuser
♦ Accessories can be screwed on - the focuser is already supplied with the 65 mm connection thread

More information about the focuser UNCN2

Parabolic primary mirror:

Newtonian primary mirrors made of fused silica are free of strain and provide an image that is usually even much better than diffraction limited. The surface is coated with an enhanced 94% reflection layer and a protective quartz layer. The primary mirror has a central marking as an adjustment aid.

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

You are not buying a "pig in a poke" when you buy a UNC Newtonian from TS, but a solid telescope for life. After assembly, we subject each UNC Newtonian to an optical test in our workshop before shipping. This ensures that the telescope will fit your accessories perfectly and will deliver the optical performance we promise.

Additional focus positions and change of secondary mirror diameter:

The focus position No. 1 with 60mm above the 2" socket has proven to be very versatile. Nevertheless, we can also offer you individual focus positions and other secondary mirror sizes at no extra charge:

♦ Focus position No. 2: 30mm above the 2" connection - optimal for visual observation. The secondary mirror can be slightly smaller, we recommend a secondary mirror with 63mm (small axis)

♦ Focus position no. 3: 90mm above the 2" connection - this allows you to use the TS2KORRR 0.73x reducer/corrector and change the focal ratio from f/4 to f/2.9. The combination is then designed for cameras up to APS-C format. We recommend the secondary mirror with 70mm (small axis).

Order of the special versions in the Shop:
On the last page of the order process, where you can complete the order, you have a text field. Here you simply copy the desired focus position into it. Please note that this is then a special version with delivery time.

Assembly and collimation instructions

The telescope is delivered disassembled into several units for safety. The assembly and adjustment are not complicated, you can download the instructions in advance. The PDF can be found here.

♦ TS UNC Carbon Newtonian telescope with 2" ACUN focuser
♦ Aluminium tube rings with two flat faces
♦ Vixen level finder shoe
♦ 8x50 straight finder with bracket
♦ 1.25" reducer with 2" filter thread
♦ Instruction manual

No reviews by eKomi at this time.

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

Meanwhile there´s a great number of Chinese Newtonian telescopes 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 Baader Steeltrack focuser because it is one of the shortest precision focuser available. A dedicated motor drive will be available soon. 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

Result of a customer

Our customer Bernd Henrichs has successfully tried in imaging the Dumbbell Nebula:

Complete imge, matched size
Data:
♦ TS-UNC 200, f4
♦ Baader MPCC Mark III
♦ CLS filter from Astronomik
♦ ATIK 383 LC+
♦ 20 x 4 minutes at -32 °C
♦ with Dark and Bias correction
♦ no Flats
♦ CGEM
♦ Guiding with Orion guide scope (70 mm) and QHY5II
♦ Locate: Germany, NRW, Neunkirchen (Siegerland)



Section from the center of the image, pixel scale 1:1
Round pixels, so without adjustment or guiding errors



Lower right hand corner, pixel scale also 1:1
Also round pixels. so working coma corrector and no bending of the telescope