On 2016-11-10 12:50 PM (-4), clipka wrote:
> The `aperture` setting is the (virtual) size of the diaphragm opening in
> POV-Ray units, though I keep forgetting whether it is the diameter or
> the radius.

In my experience, it's neither.  Comparing aperture to a jittered 
camera, it seems that dividing the aperture by about 2.7 or so yields 
the diameter.  (Or is it multiplying by 2.7...?)

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