So i gave the 8KX a go last night and had the same issue as a lot of people where i can’t get both eye’s in focus at the same time and I am seeing a very small sweet spot and really bad distortions. To address the IPD issue I wanted to use the cross hatch image that was floating around on the forum but can’t seem to find it. Before i box the 8KX up and sell it on does anyone have a copy of the image or a link to the post with it in please?
Not sure if the distortions can be resolved but at least if i can get the IPD set right that may help although not convinced.
Try to increase software IPD and then adjust hardware IPD.
Don’t use big increases because it will feel unnatural.
I tried both of those last night but without the cross hatch red green and blue image it’s hard to tell what adjustment is having an effect. From what i saw the sweet spot size is due to the lenses because no matter what mechnical IPD setting i can see the blur around the out edge is the same amount it just moves left or right depending on which way i move the wheel. At the moment the increased FOV is useless as 2/3 of it is blurred so i may as well be using a potatoe FOV HMD.
You might check the distance to the lenses (increase/decrease) and also tilting the HMD.
You never get extrem sharpness beyond the sweet spot. That would require other lenses o guess.
The picture you were looking for is found here
Yeah I understand about the sharpness beyond the sweet spot but after doing some back to backs with the 5k this morning the sweet spot is tiny. I’ve even tried the 5k gasket at it improves but not by much and still can only get 1 eye in focus.
If anyone has the red, green and blue cross hatch image that would be great, at least I can then rule out bad ipd settings?
There is no ipd image.
The image used is to have clear image through both lenses centers at the same time but this is not IPD.
I mean center to center distance is not the ipd, it is superior to ipd.
So you are supposed to have only one eye at a time on the clear zone and give your brain enough time to adapt and build a clear 3d image.
This works but needs an adaptation period with small changes at a time.
You keep repeating this crap, but don’t have a clue what others are seeing, If you like having one eye out of focus, then that’s fine for you, but others like myself DO NOT WANT this, its both eye in focus or its getting sold.
I’ve had pretty much every HMD on the market and none of them have had 1 eye out of focus including the 5k+ which has the same lenses apparently. There is somehting off with the 8KX, I thought at 1st it may have been the uncomfortable vision kit thing but even with the 5K+ gasket it’s the same so must be something in the build process that is throwing the lenses out so that they aren’t an equal distance from centre. It’s a shame as the way it is now it’s comparable usable FOV is the same as every other headset on the market. Not sure paying extra for additional blurry FOV is worth it tbh.
Try lowering your mechanical IPD down from your measured IPD by a few points and then using the software IPD to get back to your measured IPD. I did this last night and it helped my get a much clearer picture when looking forward with both eyes. Before that I had to slightly shift the HMD either left or right from center to get a a really clear image. My measured IPD is 71.1 so I dialed it down to 68.1 and then used the software IPD to add +3. Try doing something similar to that and see if it helps. Note that this also seemed to reduce the minor distortion that I was seeing at the edges to the point were I really have to struggle to notice it in normal FOV
I’ll give it a go this afternoon with the image and see if it improves the balace between the lenses. I’m not expecting the sweet spot to increase though and that will be a deal breaker fo me. There’s not point having an addtional 40 - 50 degrees of FOV if it’s blurry.
No, the sweet spot size still did not increase for me in doing this. The image still gets blurry rather quickly if I use my eyes to look around instead of turning my head. This isn’t a deal breaker for me though, because I wear progressive lens glasses so I’m used to turning my head to look at things in order to see them clearly. I don’t need my glasses in VR but I still look around like I normally do IRL so the small sweet doesn’t bother me as much as it would someone who was accustomed to looking around with their eyes only a lot. The wider FOV still helps me with immersion just because it gives me a sense of awareness by not having my vision cut off by black bars. I would still love it even more if the sweet spot were larger though.
Yes, the only way to get sweet spot a bit bigger, is get closer to the lenses, its like looking though a key hole, the closer you get to it, the more you will see, Don`t know of any HMD that had the hole lens in focus. you have to get use to moving you head.
Would help a lot, if Pimax had a eye to lens adjustment.
This makes sense. I only use the HMD in iracing and have a information box in the bottom right hand corner which in the 5k i could move my eyes to look at without any blurring. I can’t do the same in the 8KX.
@Possyguset Same here none had the whole lense without blur but for me the X has the smallest sweet spot, even less than the 5K so with this “upgrade” all i’ve gained is less SDE and higher res but lost usable sweet spot and comfort when wearing it (man this thing is heavy). Right now I hope the G2 will fix at least 4 of those short coming at the cost of less FOV which i’m sure i’ll get used to if everything else is good.
Yes I keep repeating this because it’s not crap, it’s how this headset is made.
The crap is confusing ipd and center to center distance.
By trying to match center to center distance to your ipd you mess with 3d geometry.
I’m not saying having one eye only on the clear zone is ideal, just that this is how this headset is meant to work.
The fault comes from the use of fresnel lenses instead of non fresnel.
But with fresnel lenses and huge and much canted panels this is how it’s supposed to work.
So why is it every other hmd quotes this figure as IPD and instructs the user to match it with their own IPD including the 5k+ which uses the same lenses?
If all that has changed is the panels between the 5k and X then the process for setting IPD or lenses to lenses distance would be the same. If that’s not the case then it should have been stated that its not by Pimax surely?
You say its not for ipd because that messes with the 3d geometry which is correct, but its also why they implemented the software offset.
I have a 5k+ not a x and the minimum ipd is 60 while the minimum lens to lens center distance is 64 if not 65mm.
So this confirms that 5k+ is supposed to work like this : you set your far ipd, and your eyes are not supposed to be on the clear zone at the same time.
Why the other headset are not working like that? Because the fov is small and the canting is low to none.
Risa2000 already explained in a post the geometric reason why we screw with the 3d geometry When trying to match the center of lenses to our ipd.
That doesn’t really explain anything. I know the setting messes with 3d geo which is why we have the offset which corrects it.
It makes no sense that when you move the wheel which moves the lenses in or out a message displays stating IPD measurement in the HMD. It also makes no sense that the measurement stated doesn’t match the centre to centre physical measurement. It also makes no sense that the wheel keeps moving the lenses when the measurement displayed in the hmd stops.
I’ve just tried my 5k again and if I set it to 67.5 my ipd (according to the display) both eyes are clear. Thats not the case with the X. Something is clearly off.