Ok, I just found the ultra_wide_angle keyword.
It seems to correctly imitate the GoPro2HD's default behavior, although objects
seem quite far, but it's better than before.
The lens configuration seems ok too now.

Alef,


"alefburzmali" <nomail@nomail> wrote:
> Hi everyone,
>
> I am currently using POV-Ray to generate virtual scenes, next I've got to
> analyse these generated images for a specific study. I have to simulate the
> behavior of the default setting of the Go Pro 2 HD.
>
> The default setting of the Go Pro 2 HD :
> ----------------------------------------
>
> Fixed-focal lens : 0.6m to infinity
> Aperture : f/2.8
> HFOV : 170deg
> reso : 1920x1080
>
> I changed the camera setting accordingly :
>
> camera {
>   perspective
>   //spherical
>   location camera_location
>   look_at <0,8.25,0>
>   //right       1.777777778*x
>   right x*image_width/image_height
>   //rotate <0,clock*360,0>
>   //angle hfov
>   //angle 170 43.59
>   //aperture 2.8
>   focal_point <0,6.0,0> //go pro fixed focal -> 0.6m to infinity
>   aperture 0.3571 // go pro aperture : f/2.8
>   blur_samples 20
> }
>
> But everything is blurred from the focal point to infinity, I wanted the inverse
> behavior, however I don't understand how to manage that with the POV-Ray syntax.
>
> Besides, when I set the horizontal FOV (angle) to 170deg, the image is deformed
> and objects look very far.
>
> Does any of you have already tried to simulate the behavior of a real camera and
> could help me fix my little problem ?
>
> Thanks a lot !
>
> Alef,

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