hi evereone,
does anyone know what’s the math behind the relationship between the field of view
and the target distance / focus distance value in a vray physical camera.
with focal length and aperture at fixed values, the field of view gets wider the closer
the target distance gets.
oddly, this seem to happen in a logarithmic fashion flattening out towards longer distances
what i need is a field of view or focal length value that combines the “real” one with what
is produced by the target_distance.
any ideas what a formula for this could be?
I asked chaosgroup support but no answer so far
thanks,
chris
thanks for the link.
unfortunately it is more complicated than that
the vray camera mimics the behaviour of a real physical camera. this takes into account the
focus distance which i believe is a bit harder to calculate especially since there are numerous versions and derivates of the fornulas and i don’t know how far the chaosgroup guys took it with their virtual counterpart
but in effect what i wnat would look like this:
i can assign a scripted controlller to the focal length value of the vraycam that would produce a modified focal length. when changing the focus distance, the focal length value would change but the rendered image would stay exactly the same