TS-Optics 6" f/5 UNC Newtonian Telescope with Carbon Tube

The UNC Newtonian series from Teleskop-Service offers an alternative to the Far East Newtonians

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

The 6" f/5 UNC Newtonian is a compact and transportable allround telescope. It is suitable for visual observation and astrophotography. Astrophotographers will appreciate the high speed of f/5. In combination with suitable coma-correctors, very deep-sky images are possible in a relatively short time.

But this UNC is also well suited for lunar and planetary observation. For observing with commercially available eyepieces you will need a 2" 35 mm extension tube, this will give you better focus. The part number is TSV235.

The advantages of the TS UNC Newtonian telescopes:

High-quality, German-made carbon tube with highest stability - individual manufacture.

Optimized focus position as desired and thus also best possible illumination

Primary mirror cell and secondary mirror cell improved by Teleskop-Service

Easy collimation of primary and secondary mirror - by hand, without tools

The edge of the secondary mirror is blackened

TS UNCN2-G2 2" rack and pinion focuser with M54x0.75 intermediate thread

The secondary is attached to the secondary mount with correct offset by Teleskop-Service

94 % reflectivity on primary mirror and secondary mirror for a brighter image

Diffraction limited primary mirror - each telescope is tested on our optical bench before shipment

Every UNC Newtonian is darkened inside

The tube inner side of our UNC Newtonian telescopes is darkened. This prevents reflections and provides better contrast. The TS "Black" anti-reflective paint or a velour film is used. The result is a matte black tube interior. Velour film and the TS "Black" have a similar effect and darken better than the commonly used chalkboard paint.

The illustration shows how dark the anti-reflective paint is. The diagram (at the images at the top of this page) shows the direct comparison chalkboard paint and antireflective paint.

The carbon tube - finest precision work

The carbon tube is extra solid and completely reinforced, not only around the focuser. This makes the tubes much stiffer and the adjustment stability is high. The openings for the secondary are precisely fitted with turned mating parts, so we ensure that the secondary spider vanes are correct and the telescope produces perfect spikes right from the start.

Focus position optimized for astrophotography:

The focus point is 135 mm above the tube. This allows you to use different focusers and still have a comfortable working distance. With the standard focuser UNCN2-G2 you even get 80 mm working distance, this even allows the use of focal reducers or a binoviewer with moderate glass path compensation. For standard correctors like the Baader MPCC or the TS-Optics MAXFIELD corrector we recommend the 20 mm spacer, which comes between the focuser. This gives you 60 mm backfocus.

For visual observation you need a 2" extension tube - item # TSV235.

The 2" TS UNCN2-G2 RAP focuser:

A core component of the TS UNC-Newtons is the modern TS UNCN2-G2 focuser. The focuser builds up only 58 mm from the tube edge and still carries heavy cameras and accessories without tilting. The focuser is superior to conventional Crayford focusers.

High stiffness with extremely short length

Exact 1:10 dual-speed gear - for perfectly focused astrophotographs

Adjustment is decoupled from the ball bearing - a clear advantage over Crayford focusers

Upgradable with motor focus - with the TS motor focus advantage: manual adjustment possible with mounted focuser

Ball bearings are adjustable, so the focuser can be adjusted perfectly - but we deliver the focuser already optimally adjusted.

Screw connection of the accessories possible - the 2" receptacle can be unscrewed, then an M54x0.75 female thread is available.

More information about the focuser UNCN2-G2

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.

The focus position and change of secondary mirror diameter:

The standard position with a good 80mm working distance above the 2” receptacle has proven to be very versatile, they come into focus with all correctors and even with reducers. The spacers allow you to remove the focuser from the tube without sacrificing stability. On request, we can change the diameter of the secondary mirror to obtain more illumination or less shading. The standard secondary mirror offers the best possible compromise.

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.

Production video

Our customer Jörg Weiskopf made a video in German language about his new UNC and also showed the production: Link to the video (from 7:21 the visit to TS begins)

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin

General product video

Teleskop-Service has made an information video about the UNC and ONTC telescopes:

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin

Question:
What is the function of the six screws behind the primary mirror?

Answer from Teleskop-Service:
The six screws are for the adjustment (collimation) of the primary mirror. The small screws with the slit fix the position. With the bigger screws you can adjust the collimation. And this is how it works:

Loosen the screws with the slit.

Adjust the primary mirror with the adjustment laser using the bigger screws (with internal thread).

When the desired result is achieved, tighten the screws with the slit minimally. A light pressure is sufficient.

Safety informations: PDF Download