Am 21.01.2019 um 11:56 schrieb IGM:

> I know that povray, with photons, can reproduce real optical phenomena directly
> linked to aberrations, as caustics, but it cannot emulate real optical
> aberrations *in the image itself*. (Am I right?)

You can always do what you'd do with photons: Place an actual lens 
object in front of the camera.

> Is there a way to apply a basic blur to the image without external apps, to
> avoid the unrealistic sharpness of objects in the focal plane?

If you're just aiming to add some blur, the "camera normal" would indeed 
be the way to go, as already mentioned elsewhere.

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