[57north-discuss] Depth of field

[Iain R. Learmonth]

Hi,

In optics, a circle of confusion is an optical spot caused by a cone of
light rays from a lens not coming to a perfect focus when imaging a point
source.

In photography, this can be used to create a soft background with eyes
attracted to the subject of the photo like this photo I took the other day:

  http://i.imgur.com/aHT6Beg.jpg

I found this article online about the science and maths behind this, and if
you're interested in light, optics or photography, I would say it's
definitely worth a read:

  http://lewiscollard.com/technical/background-blur/

Iain.

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