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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

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Orion Optics UK VX6 Optical Tube Assembly

SKU OOUK-VX6
Original price $676.01 - Original price $739.64
Original price
$676.01
$676.01 - $739.64
Current price $676.01
Price Match Policy!
  • 150mm (6") primary mirror diameter
  • 750mm focal length at a fast f/5 focal ratio
  • Standard 1/6 PV wavefront optics with Zygo test report
  • Lightweight 4.5kg aluminium optical tube
  • 9-point primary mirror cell with cooling fan
  • 2" focuser with reduction gearing for precise adjustment
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  • Description
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  • Orion Optics UK VX6 Optical Tube Assembly

    The Orion Optics UK VX6 Optical Tube Assembly packages a hand-figured, 150mm primary mirror into a lightweight 4.5kg chassis, delivering verifiable optical precision at an accessible level. With a 750mm focal length producing a fast f/5 focal ratio, the VX6 comes standard with 1/6 PV wavefront optics, proven by an included Zygo interferometer report, making it a powerful and portable instrument for both detailed visual observation and wide-field astrophotography.

    Hand-Figured 1/6 PV Optics: Precision You Can Verify

    The core of the VX6 is its 150mm primary mirror, which is hand-finished in the UK to a guaranteed 1/6 Peak-to-Valley (PV) wavefront accuracy. Unlike mass-produced optics with ambiguous quality claims, every VX series telescope includes a Zygo laser interferometer report, giving you documented proof of its optical precision. This standard ensures sharp, high-contrast images that resolve fine detail on planets and reveal faint structures in deep-sky objects.

    Engineered for Stability: The 9-Point Cell and 50mm Secondary

    Optical quality is maintained by a robust mechanical system. The primary mirror rests on a 9-point suspension cell that distributes its weight evenly, preventing flexure and preserving the mirror's precise figure regardless of the telescope's orientation. An integrated cooling fan helps the mirror reach thermal equilibrium with the ambient air quickly, minimizing tube currents and ensuring stable, sharp views from the start of your session. The 50mm secondary mirror provides full illumination for a wide range of cameras, a necessary trade-off for a fast f/5 imaging system.

    Portable f/5 Imaging: The 4.5kg Aluminium Tube

    Weighing only 4.5kg and measuring 750mm in length, the VX6 is built for portability. Its lightweight aluminium construction allows it to be carried by a wide range of entry-level and intermediate German equatorial mounts without sacrificing stability. The fast f/5 focal ratio captures significant light in shorter exposures, while the 2" focuser with reduction gearing enables the fine adjustments necessary to achieve critical focus for astrophotography.

    Choosing Your Grade: 1/6 PV vs. 1/8 PV and 1/10 PV Ultra

    While the standard 1/6 PV optic delivers excellent performance, optional upgrades to 1/8 PV (Research Grade) or 1/10 PV (Ultra Grade) are available for the most demanding applications. Moving to a higher grade of accuracy yields visibly higher contrast and resolution on challenging targets. This is most apparent during high-magnification views of planetary details, such as the Cassini Division in Saturn's rings or subtle banding on Jupiter, where a smoother wavefront translates directly into a sharper, more stable image.

    Comparing the Optical Grades

    The images below show the same view of Saturn captured through each available optical grade, under identical conditions -- a visual illustration of how each step up in wavefront accuracy sharpens contrast and fine detail.

    Saturn viewed through 1/6 PV Professional grade optics

    1/6 PV (Professional)

    Saturn viewed through 1/8 PV Research grade optics

    1/8 PV (Research)

    Saturn viewed through 1/10 PV Ultra grade optics

    1/10 PV (Ultra)

  • What is the real-world difference between the 1/6 PV, 1/8 PV, and 1/10 PV optics on the VX6?

    The PV (Peak-to-Valley) wavefront value measures how closely the mirror's surface matches a perfect parabola. A smaller fraction indicates a more accurate mirror. While the standard 1/6 PV optic is excellent for all-around observing, upgrading to 1/8 PV or 1/10 PV provides a noticeable increase in image sharpness and contrast, especially critical for high-resolution planetary imaging and observation.

    How will the VX6 perform on planetary targets like Jupiter?

    The VX6's 150mm aperture and hand-figured optics make it a capable planetary instrument. You can expect to clearly resolve Jupiter's main cloud belts, the Great Red Spot, and its four Galilean moons. For the best results, ensure the telescope is fully cooled using the integrated fan and consider the optional 1/8 PV or 1/10 PV upgrades to maximize visible detail.

    Is the 4.5kg weight of the VX6 suitable for a portable GoTo mount?

    Yes, at only 4.5kg, the VX6 OTA is an excellent match for popular portable GoTo mounts like the Sky-Watcher HEQ5 or Celestron Advanced VX. This combination creates a powerful and easily transportable setup for both visual astronomy and astrophotography from dark sky sites.

    What does the 9-point mirror cell in the VX6 do?

    The 9-point mirror cell provides uniform support for the 150mm primary mirror. This prevents the glass from sagging or deforming under its own weight as the telescope moves, which would distort the image. This robust support system is critical for maintaining the high-precision figure of the hand-finished optics.

    Does the VX6's fan cooling make a noticeable difference?

    Absolutely. The integrated cooling fan actively draws air over the back of the primary mirror, helping it reach the same temperature as the outside air much faster than passive cooling alone. This minimizes "tube currents"—internal air turbulence that degrades image sharpness—allowing you to get stable, high-quality views much sooner after setting up.

    What kind of imaging is the VX6's f/5 focal ratio best for?

    The f/5 focal ratio is considered fast, making the VX6 ideal for wide-field astrophotography of large deep-sky objects like the Andromeda Galaxy (M31) or the Orion Nebula (M42). It allows you to capture more light in shorter exposure times, reducing the demands on your mount's tracking accuracy.

  • Primary Mirror Diameter 150mm
    Focal Length 750mm
    Focal Ratio f/5
    Standard Optics Grade 1/6 PV wavefront
    Optical Upgrades Optional 1/8 PV and 1/10 PV Ultra
    Secondary Mirror Size 50mm
    Tube Weight 4.5kg (nominal)
    Tube Length 750mm
    Tube Diameter 167mm
    Tube Material Aluminium
    Mirror Cell 9-point suspension
    Focuser 2" with reduction gearing
    Cooling Integrated mirror cooling fan
    • VX6 Optical Tube Assembly

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  • Orion Optics UK 1-Year Warranty