Vixen Porta II AZ - alt-azimuth mount with dual-axis slow motion controls
Looking for a reliable, stable and easy-to-carry mount for your telescope? The Vixen Porta II AZ alt-azimuth mount delivers exactly that - whether you are heading out to a dark sky site for a night under the stars, or observing landscapes, birds and distant objects in daylight. This mount combines thoughtful Japanese engineering with genuine everyday practicality, and it has become a favourite choice among beginners and experienced observers alike - anyone who appreciates smooth, precise movements without complicated setup procedures.
Design and movement system
The Porta II AZ is a half-fork (alt-azimuth) mount, operating on two axes - altitude (vertical) and azimuth (horizontal). The feature that sets it apart from simpler mounts with lock-lever controls is its infinite slow motion in both axes via a worm gear mechanism. Thanks to this worm drive you can follow any object smoothly across the sky with no dead points, no sudden jumps, and without the need to release and re-grab the tube every few seconds. Friction alone provides the holding force - there are no lock screws to loosen and tighten every time you change direction. The result is fast, intuitive and comfortable handling that you will get used to very quickly.
Payload capacity and structural rigidity
The mount has a payload capacity of 5 kg, which covers the vast majority of compact refractors, smaller reflectors and spotting scopes. Structural rigidity is well above average for its weight class - even at high magnification you will not suffer from annoying image vibration every time you touch the tube. Stability during observation is one of the aspects that Porta II users consistently praise.
Dovetail compatibility
The mount uses a standard universal dovetail saddle compatible with the Vixen/SkyWatcher system. The telescope is secured with a clamping screw, so swapping instruments or rotating the tube for a more comfortable eyepiece angle takes only a few seconds. This compatibility is a significant advantage - if you already own any Vixen-dovetail accessories, everything will work immediately with no adapters required.
Height-adjustable tripod and accessory tray
The kit includes a height-adjustable aluminium tripod with a range from 70 cm to 120 cm. The lower position is appreciated when observing seated or when using shorter telescopes; the higher setting is comfortable for a standing adult observer. The tripod features an accessory tray where you can place eyepieces, filters or a star chart - always within reach and with no risk of them being knocked over. The complete system - mount and tripod - is designed with easy transport in mind: it folds down quickly, the weight is manageable, and you can set it up alone without assistance.
Tilted fork arm - near-zenith pointing without obstruction
One of the design strengths of the Porta II, particularly appreciated by more experienced observers, is the tilted fork arm. It allows the telescope to be directed to positions very close to the zenith without the tube colliding with the tripod or the mount body. This may seem like a small detail at first glance, but in practice it proves to be very significant - especially when observing summer objects high above the horizon, or watching the Moon as it passes near the top of the sky.
Versatile use - astronomy and daytime observation
The Porta II AZ is designed as a universal mount for both worlds. For astronomical observation it offers adequate stability and precise fine guidance; for daytime terrestrial use it provides fast and comfortable operation without unnecessary complications. Thanks to the alt-azimuth principle, control is natural and corresponds to intuitive movement - left/right and up/down. There is no need to know celestial coordinates or think about right ascension and declination. Simply point, focus and observe.
Technical specifications
| Parameter |
Value |
| Mount type |
Alt-azimuth (half-fork) |
| Slow motion controls |
Dual-axis worm gear (altitude and azimuth) |
| Payload capacity |
5 kg |
| Dovetail saddle |
Vixen/SkyWatcher compatible (universal standard) |
| Tripod height range |
70 - 120 cm |
| Accessory tray |
Yes (included) |
| Near-zenith pointing |
Yes (tilted fork arm design) |
| Mount weight (without tripod) |
approx. 1.5 kg |
| Total system weight (with tripod) |
approx. 3.6 kg |
| Motorisation |
Not included; optional single-axis or dual-axis motor drives available |
| Country of manufacture |
Japan |
What is included in the box
- Vixen Porta II AZ mount head
- Height-adjustable aluminium tripod (70 - 120 cm)
- Accessory tray
- Mounting hardware
Who is the Vixen Porta II AZ for?
- Beginners looking for their first quality mount that will not limit their progress
- Visual observers who want a grab-and-go setup ready in minutes
- Travellers and astrophotographers needing a lightweight, portable alt-azimuth solution
- Birdwatchers and nature observers requiring smooth panning and easy tracking of moving subjects
- Experienced observers wanting a reliable backup or secondary mount
Optional motor drives
The Porta II AZ is compatible with Vixen single-axis and dual-axis motor drive units (sold separately). Adding a motor allows automatic tracking of celestial objects, making extended viewing sessions much more comfortable and opening the door to basic afocal photography through the eyepiece.
Summary
The Vixen Porta II AZ is one of the most popular alt-azimuth mounts on the market, and that is no coincidence. It offers an exceptional balance of price, quality, ease of use and portability. If you are looking for a mount that will support rather than hinder your observing enthusiasm - this is the right choice.
