Hi I agree for focal blur, it is usually found in photographs including a
foreground because when lense is focused to infinite, blur occurate only for
1st meters ( for usual focal lengths <300mm)
I am not a maths freak but depth of field may be a tangent function of focal
distance.
Am I wrong?
Marc

3cc1f989$1@news.povray.org...
> I think the focal blur is a bit too strong.
>
>

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