This telescope is checked by us before delivery and in any case pre-adjusted. The focuser is set.


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These telescopes are shipped free of charge in Germany.

TS Boren-Simon 10 "f / 2.8 PowerNewton Astrograph

With the Boren-Simon-Powernewton you can achieve deep astro shoots in just one night, where usually many nights would be necessary.
And these recordings show through the professional ASA Reducer corrector a very good star sharpness without reflexes. Collect enough raw material for a truly final shot of the object in just one night!
The Benefits of the 10 "-f / 2.8-Power Newton:
♦ Short shutter speeds of f / 2.8 - ideal for uncooled DSLR cameras
♦ Moderate exposure times with narrow-band fog filters - ideal for use near the city
♦ Very good field sharpness by professional ASA Reducer / corrector
♦ High mechanical stiffness through carbontubus
♦ Length only 950 mm, weight only 11.5 kg - this is still carried well by transportable mounts
♦ Back focus 65 mm from the T2 thread - also suitable for off-axis guiding
♦ Illumination and correction up to APS chip format
♦ only 35% obstruction - visually usable
The Benefits of the 10 "-f / 2.8 Astrograph over the Celestron Hyperstar System:
♦ The camera is located on the side of the tube, as in the Newton. Thus, neither the shading by the camera nor the waste heat in cooled CCD cameras affects the quality of the image.
♦ The system is open at the front, so it is faster cooled and less prone to dew
♦ The Astrograph offers a greater working distance than the Hyperstar, enabling the use of DSLR cameras or CCD cameras with filter wheels.
The TS UNCN2 V-Power focuser:
A key element of the TS PowerNewtons is the modern TS UNCN2 V-Power focuser. The pullout carries heavy cameras without tilting due to oversized ball bearings and a side guide. Only through this brief extract we were able to optimize the focal position. In spite of the high light intensity, we have a catching mirror of only 88 mm diameter in the small axis, which reduces the contrast-reducing obstruction.

Other features and advantages:

♦ high rigidity with extremely short length
♦ generous back focus of 65 mm - enough space for all common coma correctors and the TS 9 mm Off-Axis Guider
♦ exact 1: 10 micro reduction - so succeed in perfectly focused Astroaufnahmen
♦ Engine focus expandable - with the TSACUMotorfok
Illumination and correction of the 10 "-1: 2.8 astrograph:
The back focus of the 10 "-f / 2.8-Powernewton is 65 mm.The Kodak KAF8300 sensor is well-lit and also well-corrected.Even DSLR cameras with APS-C sensors can be used well.With a flat one gets the slight Randabschattung good away.
Switch from fast f / 2.8 to high-resolution f / 4 in minutes:
A telescope, two focal lengths - that's also possible with the Boren-Simon astrograph. With the optional TSGPU Aplanatic coma corrector, which is optimized for f / 4 systems, turn the fast f / 2.8 astrograph into a high-resolution astrophotographically corrected Newtonian telescope with the aperture ratio of 1: 4 and 1000 mm focal length.

The conversion takes place within a few minutes and the collimation remains completely intact.


Opening: 254 mm (10 ")
Focal length: 711 mm with reducer / corrector
Aperture: f / 2.8
Main mirror: 94% reflectivity - 254 mm
Mirrors: 94% reflection - 88 mm small axis
Corrector: 4-element ED corrector
Back focus: 65 mm distance to the optimal chip position
Focus position over tube: 140 mm - visually a 50 mm extension sleeve is required
Focuser: 2 "TS UNCN2 with 1/10 reduction
Threaded: T2 thread
Tube: 305 mm diameter - carbon tube with particularly high rigidity
Weight: 11.5 kg