Pimax Vision 8K Plus Review: Ultrawide VR Headset

In September 2017, Pimax launched a Kickstarter campaign to help fund the development of an ultrawide, ultra high resolution VR headset called the Pimax 8K. It ended up offering a 200-degree field of view (FOV) and dual 4K resolution displays for better image clarity and less screen door effect. At the time, these specifications were unheard of and scarcely believable. But it’s 2020 now, and while ultrawide headsets are hardly commonplace, dual 4K resolution is not as shocking a metric.

That's the market in which the Pimax Vision 8K Plus ($899 MSRP) is competing for the title of Best VR Headset. Ultimately, the headset can provide a premium experience, but you’ll need some VR experience of your own in order to manage the amount of calibration needed to get the HMD running at max potential. 

Pimax Vision 8K Plus Specs

A Little Bit of History

Let’s go back to 2017, when Pimax promised its 8K resolution head-mounted display (HMD). Despite the wild claims and the fact that GPUs of the time were not powerful enough to drive such a headset, the campaign drew in more than $3 million from trusting fans. That's more than Oculus collected for its Kickstarter campaign in 2013. The early-bird deliveries were supposed to ship within a few months of the campaign, but that didn't happen. Pimax endured several setbacks throughout headset development that caused significant release delays.

The company eventually released the headsets it promised and then iterated and created the  Vision 8K Plus successor on our test bench.

Meet the Pimax Vision 8K Plus

As with all modern Pimax HMDs, the Vision 8K Plus is ultrawide with an extensive FOV. The headset’s two 4K displays face outward, giving you more peripheral vision than the average VR headset. Pimax advertises a 200-degree diagonal FOV, which puts it near the top of all headsets, including enterprise-class devices. For comparison, the Valve Index’s FOV goes up to 130 degrees.

Our first impressions of the Vision 8K Plus were positive. The new headset features the same sharp-angled shell as the older model. The only difference other than color is that the π logo is no longer embossed on the left-front corner.

Immediately, we noticed a significant improvement in the quality of the HMD’s exterior compared to the original Pimax headsets, the Pimax 8K and Pimax 5K Plus The 5K Plus' fragile shell left a lot to be desired, but the Vision 8K Plus features a soft-touch plastic material that feels much sturdier than the older headset. The old model flexed and creaked when we handled it; this one does not.

Pimax chose a dark blue dye for the plastic that is almost the same shade as the HTC Vive Pro. We found the color gave the Vive Pro a premium look, and it has a similar effect on the  Vision 8K Plus. The faceplate of the first Vision 8K Plus that we received featured a bright green chevron that lights up when the HMD is powered on, providing a bold contrast against the blue shell. The replacement headset includes a chrome finish over the chevron, which still lights up green. The chrome used to be reserved for the Pimax Vision 8K X, but Pimax recently revised the 8K Plus to include these shiny accents.

The power button and volume controls are on the top right corner of the headset. When the headset has power but the display is off, the LED next to the power button is red. When the panels are on, the light shines purple. The buttons are chrome like the chevron.

The Vision 8K Plus includes a mechanical IPD (interpupillary distance, the amount of space between the eyes) adjustment, which can set the lenses as close as 60mm apart and as far as 72.5mm. The gigantic lenses have a large sweet spot, so the IPD range should be forgiving for anyone who falls outside the mechanical range.

Bring Your Own Headphones

The Vision 8K Plus headset does not include built-in headphones but does include an embedded microphone to capture your voice. The headset has headphone jacks for connecting a pair of headphones or Pimax's modular audio head strap accessory.

We prefer to use a wireless headset for audio to avoid the hassle of the extra dangling cable, but it’s nice to have options. The headset includes two 3.5mm headphone jacks, but only the left one works for third-party audio devices. The right jack is specifically for Pimax's audio head strap accessory.

A proprietary 3-in-1 tether cable delivers the signal from your computer to the headset. The cable includes USB 3.0 for data, DisplayPort 1.2 for the video signal and 12v power to run the HMD. 

The headset also offers two USB Type-C ports to run accessories. The USB-C port on the bottom is reinforced with a thick metal bezel and has a firm click when plugging in an accessory. That port is meant for the Ultra Leap hand tracking accessory (sold separately). Pimax also partnered with 7invision to develop an eye tracking module that you can order from the Pimax website.

The Vision 8K Plus also includes a second USB-C port on the top of the headset, but, unfortunately, it may not be usable. There appear to be two significant flaws in the design. The port is recessed inside the upper edge of the HMD, and the opening around it is too small for some USB cables.

We found a few wires that would fit into the opening but then noticed another problem: The cables that did fit into the opening stick out too far and get in the way of the comfort kit. Pimax would need to develop a custom cable for any accessories that use this port.

What's a Comfort Kit?

The Pimax Comfort Kit is an upgraded foam facial interface meant to improve the headset's fitment. It’s available as an upgrade for older Pimax HMDs, but it's a standard component on the Vision 8K Plus. If you don't need to use the top USB-C port, the Comfort Kit is a worthy upgrade.

In effect, the Comfort Kit is a broader and taller foam cushion and bracket with a rubber nose guard to reduce light bleed. The cushion seals off light quite well. We only noticed light bleeding in when a bright light source, such as photography lights, was directly behind us. If you really try, you can spot the floor through a tiny sliver.

That's a Big Forehead

The cushion on the Comfort Kit is much more comfortable than the foam on the 5K Plus. It may be the most comfortable headset cushion that we've yet tried. The cushion extends above the edge of the visor, which gives it a much larger, more supportive forehead area that helps balance and distributes the weight better than rivals.

Absorption is the comfort kit's biggest downside. The cushion on the Vision 8K Plus is made of foam material that wicks up moisture like nobody's business. If you play games that make you sweat, the cushion will get ugly fast. It's a shame that Pimax didn't opt for a moisture-resistant material like the PU leather found in VR Cover accessories. Unfortunately, VR Cover does not support Pimax headsets at this time.

At CES 2020, Pimax said it would offer multiple cushion options, including a PU leather and an antimicrobial option. To date, those cushion options have never been offered for sale.

No Mechanical Head Strap

Although the Comfort Kit helps make the Vision 8K Plus fit better than the 5K Plus, the headstrap tips the balance in the wrong direction. Unbelievably, the new strap is in some ways worse than the one that came with our pre-production Pimax 5K Plus M2.

Our review unit of the Vision 8K Plus didn’t come with the optional modular audio head strap. Instead, we found a nylon 3-point harness in the box, which we had to install ourselves. Annoyingly, the head strap installation required the removal of the Comfort Kit, which came preinstalled from the factory. It would’ve been nice to have the strap preinstalled at the factory or the Comfort Kit left uninstalled, so you wouldn't have to tear it off as soon as you receive the headset.

The 5K Plus we reviewed in 2019 had some straps to tie down the tether cable so that it exits the headset at the rear. The Vision 8K Plus doesn’t include any guides to direct the tether cable along the side. We routed the cable through an elastic on the rear of the strap, but that’s not an ideal solution.

It wouldn't be fair to say that the new strap is worse in all ways. Pimax did widen the upper strap to help distribute the device's weight, but it's a very subtle difference. For the price that Pimax asks for this headset, a mechanical strap should be standard equipment.

Image Clarity

At first glance, the quality of the Vision 8K Plus’ displays seemed very impressive. Image clarity appeared to rival the best HMDs that we’ve tested. However, it soon became apparent that this is somewhat of an illusion.

Details, such as our hands, the items we carried, and nearby walls, were clear, and the screen door effect nearly imperceptible, but objects in the distance seemed somewhat hazy. After playing around with the many calibration settings, including render resolution, FOV and refresh rate, we learned that the image clarity is highly dependent on the way you set up the screens and how powerful your computer is. However, the headset screens have poor color reproduction, so no matter what we do, bright details looked washed out. Black levels could improve too, and that’s not something we’re usually picky about.

The Vision 8K Plus’ ultrawide lenses introduce a type of distortion that we've only experienced with Pimax headsets. The outer extremities of our FOV had a warped look to them. This phenomenon goes back to the original prototype of the Pimax 8K that we tried years ago. As much as Pimax has improved the distortion with software, the problem persists, and we’re not hopeful about a solution.

You have two options, and neither one is a perfect solution. You can either live with the distortion in your peripheral vision or use Pimax's PiTool software to limit the FOV to hide the imperfection, which kind of defeats the purpose of buying an ultrawide headset.

The problem is even worse when you run your display at the fringes of its ability. With the HMD’s refresh rate set to 110 Hz, the extremities of the screen produced a chromatic blue shimmering blue effect.