Newton telescope TS-Optics 8" f/4 UNC with Carbon Fiber

Telescope newton TS-Optics 8" f/4 UNC with Carbon Fiber

The UNC Newtonian series from Teleskop-Service offers an alternative to the Far East Newtonians
With these telescopes you don't have to make any compromises. UNC stands for Universal Newtonian telescope with carbon tube. Each UNC Newtonian 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 f/4 focal ratio allows for very deep images of galaxies and nebulae with short exposure times. We suggest the well-known Skywatcher EQ5 or the very stable Celestron Advanced VX as a mount for this telescope.

The advantages of the newtonian telescopes TS UNC:

♦ High-quality, German-made carbon tube with highest stability - individual manufacture.
♦ Optimized focusing position as desired and thus also the 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
♦ Rack and pinion focuser TS UNCN2-G2 2" with intermediate thread M54x0,75
♦ Secondary is attached to secondary mount with correct offset by Teleskop-Service
♦ 94 % reflectivity on primary and secondary mirror for a brighter image
♦ Diffraction limited primary mirror - each telescope is checked on our optical bench prior to shipment

All UNC Newtons are darkened on the inside

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

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 of slate paint and anti-reflective paint.

The carbon tube: maximum precision work
The carbon tube is extra solid and fully reinforced, not only around the focuser. This makes the tubes much more rigid and the adjustment stability is high. The openings for the secondary are precisely adjusted with turned coupling parts, so we make sure that the spider blades of the secondary are correct and the telescope produces perfect peaks right from the start.

Optimized focus position 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 even a working distance of 80 mm is achieved, which 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 of retrofocus.

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

The TS UNCN2-G2 RAP 2" focuser:
A central component of the TS UNC-Newtons is the state-of-the-art TS UNCN2-G2 focuser. The focuser rises only 58 mm from the edge of the tube and still supports heavy cameras and accessories without tilting. The focuser is superior to conventional Crayford focusers.

♦ High rigidity with extremely short length
♦ Exact double speed reduction 1:10 - for perfectly focused astrophotographs
♦ The adjustment is decoupled from the ball bearing - a clear advantage over Crayford focusers
♦ Upgradeable with motorized focusing - with the advantage of motorized focusing TS: manual adjustment possible with mounted focuser
♦ The ball bearings are adjustable, so the focuser can be perfectly adjusted - but we deliver the focuser already optimally adjusted.
♦ Threaded connection of the accessories possible - the 2" receptacle can be unscrewed, then a female thread M54x0.75 is available.

Parabolic primary mirror:
Newtonian primary mirrors made of fused silica are stress-free and provide an image that is often even much better than diffraction limited. The surface is coated with a 94% enhanced reflection layer and a protective quartz layer. The primary mirror has a center mark as an adjustment aid.

Primary mirror fan to accelerate cooling time:
A 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 down does this effect stop.

All carbon Newtonians TS are tested on our optical bench prior to shipment:
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 shop before shipping. This ensures that the telescope will fit your accessories perfectly and deliver the optical performance we promise.

Prior to shipment, the primary mirror with the cell is removed from the tube and packed separately. This ensures safe shipping and avoids unnecessary damage during transport.

Additional focusing positions and changing the diameter of the secondary mirror
Focusing position #1 with 60 mm above the 2" receptacle has proven to be very versatile. However, we can also offer you individual focus positions and other secondary mirror sizes at no additional cost:

♦ Focusing position #2: 30 mm above the 2" receptacle - optimal for visual observation. The secondary mirror can be slightly smaller, we recommend a secondary mirror with 63 mm (minor axis)

♦ Focusing position #3: 90 mm above the 2" connection - allows using the TS2KORRR 0.73x reducer/corrector and changing 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 70 mm (minor axis).

Order the special versions in our online store:
On the last page of the ordering 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 in several units for safety. Assembly and adjustment are not complicated, you can download the instructions beforehand. The PDF can be found here.

Summary of general features:

Teleskop-Service's UNC Newtonian telescopes are the alternative to Far East Newtonians and high-end Newtonian telescopes. We optimize the Newtonian according to your wishes.

♦ Aperture 200 mm / focal length 800 mm / focal ratio f/4

♦ Quality optics selected to obtain the best images

♦ 94% reflectivity on primary mirror and secondary mirror for brighter and high contrast image

♦ Optimized focus position (60 mm working distance) and size of the secondary for optimal illumination with the least possible obstruction

♦ Secondary mirror with blackened edges - against stray light

rAP focuser with ball bearing TS UNCN2-G2 with screw possibility for photographic adaptations - optimal for photography and observation - motorizable of course

only 7.4 kg total weight with very high tube stiffness at the same time

each UNC newtonian is tested on Teleskop-Service's optical bench before shipment - delivery includes serial number and manufacturing protocol

♦ Manufactured in Germany

Technical specifications:

• Telescope Type: Newtonian Telescope
• Primary mirror diameter: 200 mm - 8".
• Focal length: 800 mm
• Focal ratio: f/4
• Primary mirror: Parabolic primary mirror - mirror substrate quartz glass
• Optical quality: Significantly better than diffraction limited
• Reflectivity of primary mirror and secondary mirror: 94 %, improved
• Secondary mirror diameter 70 mm minor axis - other secondary mirror sizes on request
• Tube: Carbon tube - solid material with aluminum reinforcement ring - wall thickness 2.5 mm
• Tube inner diameter: 230 mm
• Focuser: 2" rack focuser UNCN2-G2 with M54x0.75 adapter thread for screw adapters
• Weight: approx. 7.4 kg with tube rings
• Length: approx. 800 mm (depending on the focusing position)
• Dimensions: The specified dimensions and weights are to be considered as approximate values, they may vary depending on individualization.

what is included in the box?

♦ Carbon newtonian telescope TS UNC with 2" UNCN2-G2 focuser
♦ Aluminum tube rings with two flat bearing surfaces per ring
♦ Dust caps for telescope aperture and focuser
♦ Finder shoe style Vixen
♦ 8x50 finder with finder mount
♦ 2" reduction to 1,25" with 2" filter thread
♦ Fan for primary mirror cooling
♦ Telescope mounting and collimation instructions

NOTE: this tube does not include the dovetail or the battery box to power the fan. Contact our technicians for advice on the best accessories for this tube.

Newton telescope TS-Optics 8" f/4 UNC with Carbon Fiber