Newton optical tube TS-Optics 12" f/4 UNC with fused quartz main mirror and carbon tube

Newton optical tube TS-Optics 12" f/4 UNC with fused quartz main mirror and carbon tube

Teleskop Service's UNC series is THE alternative to Far Eastern Newtonians, but also to high-end, high-cost instruments. UNC is an economical and uncompromising line of telescopes. UNC stands for Universal Newtonian telescope with carbon tube. Individually optimized, made in Germany!

The UNC 12" f/4 Newtonian is a transportable telescope for astrophotography. The fast f/4 focal ratio allows very deep images of galaxies and nebulae with short exposure times. We suggest the famous Skywatcher EQ8 Goto mount as a base for this large telescope. Also the Celestron CGX is an alternative, if you want to move the telescope.

Advantages of the Newtonian TS UNC:

• High-quality carbon fiber tube, individually manufactured in Germany
• Focusing position optimized according to customer requirements for the best field illumination
• Primary and secondary mirror cell improved by Teleskop-Service
• Easy collimation without tools
• Blackened secondary mirror edges
• Mirror substrate is fused quartz (thermal properties similar to Zerodur)
• Focuser TS UNCN2-G2 2" RAP - one of the best systems in its class
• Secondary mounted with correct offset
• Limited diffraction system

Anti-reflective paint TS "Black" for maximum contrast

Many of our UNC Newtonian telescopes and all ONTCs use TS-Optics' "Black" anti-reflective paint. It darkens the inside of the tube as well as velvet sheeting. The illustration shows how dark the anti-reflective paint is. The diagram (in the images at the top of this page) shows the direct comparison between commonly used slate paint and anti-reflective paint.

Quartz glass mirror substrate:

Each material has its own coefficient of thermal expansion. This is essential for the mirror's reaction to temperature changes. The lower this coefficient of expansion, the less the mirror reacts to temperature changes. It is ready for use more quickly and, above all, focus drift is reduced during astrophotography.

The fused quartz bulk mirror has no recognizable dilation, making it superior to the popular Pyrex or Suprax bulk mirrors, similar to Zerodur. For this reason, a quartz glass mirror is especially suitable for astrophotography. Due to its excellent surface, we also recommend this mirror for building high-resolution Newtonian telescopes for visual observation.

Three focusing positions are possible:

Pos. 1 - Astrophotography with normal coma correctors - 65 mm distance from the 2" focuser connection (STANDARD version)

This version is perfect for almost all 2" Newtonian coma correctors like the Baader MPCC, TS Komakorrektor, GPU corrector, ASA Quattro, ... For visual observation, you will need a 35 mm 2" TSV235 extension tube.

Pos. 2 - Astrophotography with ASA 2" Reducer/Corrector - 90 mm distance from the 2" connection of the focuser

This version is made for the famous ASA 2KORRR Reducer and Corrector. The focal ratio will be reduced from f/4 to f/2.8 with a really good field correction.

Pos. 3 - Optimized for visual observation and TeleVue Paracorr VIP-2010 - 35 mm distance from the 2" focuser connection

This version is perfect for amateur astronomers looking for a telescope for visual observation. For this version you can also choose a 63 mm secondary mirror.

how can I order the right version?

If you order online in our store, you will get to the page where you can choose the payment method. There you will find a text field. In this field, enter the version you want.

The focuser TS UNCN2-G2:

A centerpiece of the TS PowerNewtons is the advanced TS UNCN2-G2 focuser. The focuser supports heavy cameras without tilting thanks to oversized ball bearings and a side guide. Only with this short focuser could we optimize the focus position. Despite the high brightness, we managed with a secondary mirror of only 74 mm diameter on the small axis, which reduces contrast obstruction. Other features and advantages

• high rigidity with extremely short overall length
• generous 65 mm rear focus without reducer corrector - enough space for all common coma correctors and accessories like off-axis guide or filter wheel
• precise 1:10 double-speed gearing - for perfectly focused astrophotographs
• detachable motorized focus
• equipped with additional thread M54x0,75

Primary mirror fan to speed up cooling time:

We have chosen to equip this telescope with a fused quartz primary mirror and a cooling fan to accelerate the cooling time to room temperature. Until a mirror is properly cooled, it will create hot air currents that will deteriorate the image, regardless of which mirror substrate is used. Only after the mirror has cooled does this effect stop.

Parabolic primary mirror:

The parabolic primary mirror of this telescope is not made of cheap float glass, but of fused quartz without internal stresses. Its thermal properties are usually better than those of borosilicate glass. To facilitate collimation, the mirrors are properly centered.

Each and every Newtonian TS Carbon Imaging is tested on our optical bench before shipping:

You do not buy "a pig in a poke" but receive a telescope individually tested in auto collimation. Newtonian UNC telescopes are handmade telescopes "made in Germany".

TECHNICAL SPECIFICATIONS:

• Telescope type: Newtonian
• Aperture: 305 mm - 12"
• Focal length: 1000 mm
• Photographic speed: f/4
• Primary mirror: Parabolic, fused quartz
• Optical Quality: Significantly better than diffraction limited
• Reflectivity: 94
• Secondary diameter: 100 mm (minor axis). Other sizes on request
• Tube: Carbon fiber with aluminum reinforcement rings, 7 mm thick
• Inner tube diameter: 344 mm
• Supporting surface at the bottom of the tube rings: Supporting surface flat with M6 thread
• Supporting surface at the top of the tube rings: Flat supporting surface with 1/4" internal thread (tripod thread)
• Focuser: 2" UNCN2-G2 RAP focuser with 54 mm thread for screw-on adaptations
• Weight: approx. 19 kg with tube rings
• Length: approx. 1200 mm (depending on focusing position)

what is included in the box?

• TS UNC Newtonian carbon telescope with 2" focuser UNCN2-G2
• Aluminum tube rings with two flat sides
• Dovetail type Vixen
• 8x50 straight finder with mount
• 2" to 1.25" reducer
• Instruction manual

Newton optical tube TS-Optics 12" f/4 UNC with fused quartz main mirror and carbon tube