Hello, I bought the tool to measure the difference in FOV of different types of face gaskets on my Reverb G2. While some youtubers tested the G2 with more than 110° vertical, I can only measure about 94° horizontal and 90 Vertical.  With alternate face gasket I got 98 and 94°. I am using the recalibrated december  version of the tool. Which measurement is the right one? The one I measure or the one the others got? Do they use older versions of the tool? The FoV does not look like to be that much higher in vertical...

Regards

Polyamid

Hi! Thanks for trying it :)

The main idea is: you can't have more FOV (hFov or vFov) than the max value the driver is telling to the renderer. So, no matter the app you use, you are only allowed to see what the headset draws. With the Calibrated version, I've tried to calculate the fixed position that gives you the "max" hFov & vFov possible according to what the headset renders. From there, it can only go smaller or narrower.

To check if any other apps (including mine) are working, remove the facial from the headset and look to the very limits of the cone edge (= the limits of the visible screen). That measure should give you exactly what the headset manufacturer driver states: the max hFov / vFov drawn, not a single second of degree more. Once done that, you can be sure that you are measuring the Fustrum (look it up in Wikipedia) from the right point and the subjective FOV is in concordance with the theory.

:)

Ok, if I understand you right, there is  a maximum FoV, the headset manufacturer allowes me to see. If my distance is too far from the lenses, the seen FoV can be smaller, but at a perfect distance, I see the maximum and I will not be able to see more, because it is no longer rendered on the panel itselve. 

This means there is a perfect lens to eye distance and you will not be able to get more FoV, even, if you go closer to the lense....

If I understand that right, the G2 can only render a maximum FoV of 98° horizontal and 94° vertical and every youtuber talking about 110° with the G2 uses an older, wrong calibrated version of your tool? 

Than I have to find a gasket, that makes it possible for me to view that maximum FoV and it makes no sense to get closer.

Yep. The hFov and vFov are limited by the driver itself, the structure of the headset internals - lenses & cup- and the so-called HAM -hidden area Mask. The driver and the HAM are software controlled, the structure of the lenses and the cup dimensions are hardware. 

The designer of the headset decides the final FOV value, trying to match the hardware limits with the software limit to just render the visible pixels. So... again, the max hFov and vFov are normally fixed and can't be changed. There are other headsets like Pimax that can decide to alter programmatically the max FOV (Large o medium) by not rendering the pixels beyond certain software limits. But as far as I know, G2 is rendering exactly what the driver states.

Those with results above the driver max FOV values are using the pre-calibrated versions or a different app. ;)