"Kenneth" <kdw### [at] gmailcom> wrote:
>
> I actually don't know if a POV-Ray lens-type object will cause 'blurring' the
> way a real lens does (which is a combination of the lens itself and the eye's
> inability to focus on the resulting 'aerial image.') I've never tried testing
> such a thing in POV-Ray. I *suspect* that its camera will always keep all rays
> sharply 'focused' (so to speak).

.....because the camera types (excluding focal-blur of course) are what might be
termed 'ideal pinhole cameras'. In photographic terms, that's like a lens with
an infinitely small aperture-- where *everything* is always in focus, no matter
how close or far away. Our eyes can't do that. :-(

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