Meant to be Seen

Posted: **Mon Jul 11, 2016 3:10 pm**

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

Posted: **Tue Oct 11, 2016 6:16 pm**

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

Cheers,
-Adam

Meant to be Seen

Why focal length is should be 40 mm?

Why focal length is should be 40 mm?

Re: Why focal length is should be 40 mm?