Orion Optics UK VX10 Optical Tube Assembly
- 250mm (10") Primary Mirror Diameter
- 1200mm Nominal Focal Length
- f/4.8 Focal Ratio
- Standard 1/6 PV Wavefront Optics
- 11kg Nominal Tube Weight
- CNC 9-Point Mirror Cell with Cooling Fan
Simulate the exact field of view of the Orion Optics UK VX10 Optical Tube Assembly with your specific telescope.
Launch Visual Assistant
Simulate the exact field of view of the Orion Optics UK VX10 Optical Tube Assembly with your specific telescope.
Launch Imaging AssistantThe Orion Optics UK VX10 Optical Tube Assembly delivers serious deep-sky and planetary capability, built around a hand-figured 250mm primary mirror with a guaranteed 1/6 PV wavefront accuracy. Its fast f/4.8 focal ratio and 1200mm focal length provide a wide field of view for imaging nebulae, while the entire aluminium tube weighs a manageable 11kg. Support for the primary is provided by a CNC-machined 9-point cell, ensuring optical stability as you move across the sky.
With a 250mm (10-inch) primary mirror, the VX10 gathers enough light to resolve faint galaxy arms and dust lanes in nebulae from a dark sky site. The 1200mm focal length and f/4.8 ratio create a bright image plane and a wide true field of view, allowing you to frame large targets like the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000) with a suitable wide-field eyepiece or camera sensor. The 63mm secondary mirror provides even illumination for many popular imaging sensors, though for astrophotography, a coma corrector is recommended to achieve pinpoint stars across the entire field of this fast optical system.
Every VX10 includes a primary mirror hand-figured in the UK to a minimum standard of 1/6 PV wavefront accuracy, a grade many manufacturers consider premium. This precision ensures sharp, high-contrast views, especially noticeable during high-magnification observations of planets and the Moon. Each optic is certified with a Zygo laser interferometer report.
For those seeking the highest possible resolution, the VX10 offers optional upgrades to 1/8 PV (Research Grade) or 1/10 PV (Ultra) optics. Moving to a higher grade minimizes the peak-to-valley wavefront error, translating directly to finer detail resolution on challenging targets like Jupiter's cloud bands or Cassini's Division in Saturn's rings under steady seeing conditions.
The VX10's engineering focuses on thermal and mechanical stability without excessive weight. The aluminium tube, measuring 1140mm long and 280mm in diameter, brings the total OTA weight to a nominal 11kg, making it compatible with a wide range of equatorial mounts in the EQ6 class. The primary mirror is supported by a CNC-machined 9-point flotation cell that prevents flexure, and an integrated cooling fan helps the mirror reach ambient temperature quickly for stable, sharp images. A 2" focuser with reduction gearing is fitted for precise, repeatable focusing, critical for both visual observation and imaging.
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.
1/6 PV (Professional)
1/8 PV (Research)
1/10 PV (Ultra)
PV wavefront measures the peak-to-valley error of the mirror's surface compared to a perfect parabola. A smaller fraction indicates a more accurate mirror. The VX10's standard 1/6 PV is a high-performance specification that ensures sharp, high-contrast images, exceeding the "diffraction-limited" standard of 1/4 PV used by many mass-producers. Every Orion Optics UK mirror is supplied with a Zygo interferometer test report to certify its quality.
For visual observers and imagers focused on planetary detail, the upgrade is significant. While the standard 1/6 PV optic is excellent, moving to 1/8 PV (Research Grade) or 1/10 PV (Ultra Grade) provides a noticeable increase in image contrast and the ability to resolve finer details under good seeing conditions. If your primary goal is capturing the subtlest features on Jupiter, Saturn, or Mars, the higher-grade optics will deliver superior results.
With a nominal tube weight of 11kg, the VX10 optical tube requires a sturdy equatorial mount. For visual use, a mount in the EQ5/CG-5 class might suffice, but for astrophotography, a mount with a higher payload capacity like a Sky-Watcher EQ6-R Pro, Celestron CGEM II, or similar is strongly recommended to handle the OTA's weight and 1140mm length, ensuring stability and tracking accuracy.
The f/4.8 focal ratio is considered fast, which is a major advantage for deep-sky imaging. It allows you to collect a strong signal on faint objects like the Orion Nebula (M42) with shorter sub-exposure times compared to a slower f/8 or f/10 system. This reduces demands on your mount's tracking and allows you to capture more data in a single session.
Yes, assuming good atmospheric seeing. While the standard 1/6 PV optic will show Jupiter's main cloud belts and the Great Red Spot clearly, upgrading to 1/8 PV or 1/10 PV allows the telescope to resolve finer, lower-contrast details. This includes smaller storms, subtle shading differences within the belts, and intricate festoons. The more perfect the mirror's surface, the less light scatters, resulting in a higher-contrast image that holds up better at very high magnifications.
The VX10 optical tube assembly is fitted with a 2" focuser with reduction gearing and a 9-point mirror cell with a cooling fan. Please note that accessories such as eyepieces, a finder scope, and mounting rings are typically sold separately to allow you to configure the telescope to your specific needs.
| Primary Mirror Diameter | 250mm |
| Focal Length | 1200mm |
| Focal Ratio | f/4.8 |
| Standard Optical Grade | 1/6 PV wavefront |
| Optical Upgrades | Optional 1/8 PV and 1/10 PV Ultra |
| Secondary Mirror Size | 63mm |
| Tube Weight | 11kg (nominal) |
| Tube Length | 1140mm |
| Tube Diameter | 280mm |
| Tube Material | Aluminium |
| Mirror Cell | CNC 9-point suspension |
| Focuser | 2" with reduction gearing |
| Mirror Cooling | Integrated Fan |