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Why focal length is should be 40 mm?
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Author:  vrdevel [ Mon Jul 11, 2016 3:10 pm ]
Post subject:  Why focal length is should be 40 mm?

Hello guys

I want to make my own HMD smaller.
To achieve it, i should make Focal lenght less than 40mm.

I tried 25mm Focal length with 6" display and it seems fine, coz i can see everything on display, no cutting.

So, is there any formula or rule that it should be not less than 40mm?

Thanks

Author:  AdamMunich [ Tue Oct 11, 2016 6:16 pm ]
Post subject:  Re: Why focal length is should be 40 mm?

It is difficult for most people to focus their eyes with lengths < 40mm.

Cheers,
-Adam

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