Is there a limit Ipd for the 8kx

Hi, is an ipd of 5,95cm ok for the 8kx? I want to play dcs

Do you already a pimax hmd?

Some with low ipd have good experience and some don’t.

With your ipd you should be fine between tge Hardware ipd range adjustment plus the soft ipd settings

No, so far not yet. With the Pimax 8Kx, the FOV is great for simulation like dcs i think and the tracking and the controller are great, but I’m not sure whether it fits my face shape. Lots of users say that the image is not great with a low IPD or head shape and they cannot see a reasonable picture. But many also report that it is very great. At this price, it worries me that I will pay a lot but it does not fit to my face and I cannot exchange or return the device. So i dont now wat to do?!? Having to adjust things doesn’t scare me.

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I hear you there. We really need spaces to try headsets before making a purchase. One option though will cost a bit more and think it might mention a restocking fee?

Is wait for it to be available on Amazon. Otherwise you could try discussing with @PimaxQuorra and/or @Miracle about ordeing and returning if not suitable. Though Amazon is likely to be a better peace of mind.

How did you get your PiMax 8KX to look so good. Mine looks like crap. Not clear pic at all. I’ve tried to tweak the setting etc. When I put on my Rift s things are so much clearer.

This has turned out to be a big waist of money

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My ipd is 64mm and I wear glasses, I could never get the image clear in both eyes even with the ipd set to 60mm, most people say they need 3-4mm less than their normal IPD to get it clear, so at 59.5mm I would say that puts you in the “high risk” category for it not working for you.

The other option that’s getting good reviews for sims is the G2.

There are other factors than IPD alone, like how deep You eyes are in Your eye sockets (distance to lenses).

My IPD is 64 too and the 8KX works for me.

I’m nearsighted so I don’t wear glasses in VR.

I’m using the VRMust PU leather foam + a single layer of double-sided velcro all round and an extra layer at the sides (the headset feels too loose when I shake my head if I don’t put an extra layer at the sides).

Not saying that I don’t believe You (why wouldn’t anyone want to make it work?), because I really do. Just saying it’s not IPD alone… :wink:

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Hence why I mentioned I wear glasses and other people have managed to get it to work at -3mm from their normal IPD.

At 59.5mm though, the pimax doesn’t go to 56.5mm so I think that tip is off the table.

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I’m just trying to say that the -3 mm thing definitely doesn’t work for me… :wink:

Best bet will probably be to get a response from someone with a similar (very low) IPD.

Even better if we could compare face shapes (depth of eye sockets/forehead to eye lense distance)… :slight_smile:

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I don’t have the X yet. However have no issues with my og 8k and 5k+

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So… 59-60-ish IPD here; Deep-set eyes; Low prominent brow, and high prominent cheekbones; Aging eyes have begun to need reading glasses to resolve things closer than an arm’s length. Pretty much the worst of all worlds, for HMD use. :7

My P8kX’s lens spacing adjustment bottoms out at 60.2mm, according to the on-screen readout, but there seems to be quite a bit of variance from unit to unit, in that regard.

Thanks to the canted screens and lenses, one can actually, in theory, still manage, even if one is a bit below the minimum IPD the HMD can accomodate, by increasing the eye relief (the distance from one’s eye to the lens) a bit, but there are other concerns with the lenses, which are exacerbated by that same canting…

The focus falls off early, and rapidly, away from the centre of each lens, and since, given the canting, they point away from each other, from your point of view, this means it is impossible to converge on something, and have the sightlines of both eyes pass through the “best” part of each lens at the same time; If you look toward the centre of one lens, you inherently look away from the centre of the other.

Some have been working around this, by decreasing the lens spacing, so that the lens centres are each positioned right in front of its respective eye, but not only does this not fix the real problem, and results in an incorrect, warped projection, as well as a concentrating your focus even more forward, at the cost of the periphery, but it is completely out for us scrunch-faces, who are far from the 70mm minimum c-c lens spacing.

I more and more suspect that the “apparent” focal depth the optics of the HMD puts the image at, is less than a metre away, where other headsets tend to go for something between one and two metres, or sometimes infinity.

(One could speculate that maybe the designer (Robin?) is nearsighted - possibly myopic, and have shaped and set the lens in such a way that he can use the headset without glasses - I dunno… :7 This would work fine for people who have either normal eyesight, or are nearsighted, but would become a problem for anybody who struggle to see things up close.)

(That said: There are other users here, who describe similar eyesight situations as mine, who profess to have no trouble with their p8kX:s.)

Even so… I have taken the lenses out of my p8kX, and tried looking through them at fine print, and have found no combination of position/rotation relationship between observer, lens, and subject, that gives me even so much as HTC Vive-level focus consistence across the view, degree-for-degree. Changing the subject-to-lens distance helps a little, as one would hope, but not enough to become tolerable.

As an example of the effect of the above, for this one user: Elite Dangerous’ main menu scene, in form of a hangar occupied by your current ship. I look up at the closest downward thruster on that ship; It has a cone segment that is textured with a blue honeycomb pattern… Through the pinhead-sized spot right in the centre of each lens, I can see that pattern (and the “screen door effect” of the display panels, too), but I need only turn my head a single degree, and the texture disappears altogether, and blurs into a uniform fuzzy blue.
In other headsets, even though they are significantly lower resolution, I do not have this problem.

One interesting thing I have observed, having manipulated the lenses out of the headset, is how the “egg yolk” conventional aspheric part of the lens, on its “user side” seems to effectively collimate the light toward the fresnel part on the “display screen side”; I can turn the lens this way and that, and the ring segments of the fresnel surface appear to “stay put”, almost as were they not rotating along with the rest of the lens, “virtually always facing both the screen and the observer”, so to speak. This indicates that there is definitely some solid engineering behind the lens; Alas not to my advantage, at least. :7

It also seems that much more than with other HMD lenses I have tinkered with, there is an ideal eye-to-lens distance for a sharp image, and not just the lens-to-screen distance on its other side; If I move closer or farther, there is a distinct softening.

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Thanks for all the comments here!

@ Jojon, -> “I have taken the lenses out of my p8kX, and tried looking through …” You are really crazy dude … love you.

I think that I will wait because of all the comments I got here and on other sites.
The plan was to buy a headset to have fun in VR during the Corona crisis and over the Christmas holidays.
My main focus was on flight simulations like DCS.

My summary of the thoughts:
Pimax 8KX unfortunately too unsafe. Absolutely need to be tested before buying.
Valve Index: Largest possible FOV according to the Pimax, good tracking, good controllers but old resolution of the screens.
Reverb G2 very nice resolution of the screens, unfortunately too small FOV, bad controllers and not good tracking.

A huge misery! So I will have to wait until Valve Index will hopefully update its glasses soon.

THX@all

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Yes, this is true for any headset, given how different experiences different people can have with the very same HMD, and it is a shame VR is not big enough a market that one can find, try, and buy all models at local stores. As you see on this forum, some people seem to have a great time with their p8kX:s, but then there is people like myself…

Sorry to be the seeder of doubt. :7

VR really is too good to miss out on, IMHO – maybe if you don’t mind spending a little throwaway money, you could consider whetting you apetite on one of the cheaper offerings from some known quality brand, or possibly stumble across a bargain used device, before splurging on something expensive, and fill your downtime with that… :7

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Yes, I have already considered buying the Valve index. Should they bring out a new one, I still have the good controllers and the base stations that I can continue to use. the glasses themselves were, like you say, thrownaway money. With about 400€ to cope with. I found out that the Valve index came out 2 months after the Reverb g1. Maybe it’s the same now. 400 € for 2 months will hurts me. Maybe it will take more than 6 months. Who knows … I think I’m really in a … time right now :slight_smile:

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