Steve's Digicams Forums

Steve's Digicams Forums (https://forums.steves-digicams.com/)
-   Newbie Help (https://forums.steves-digicams.com/newbie-help-16/)
-   -   Circles of Confusion (https://forums.steves-digicams.com/newbie-help-16/circles-confusion-131719/)

daddyorchips84 Nov 2, 2007 12:20 PM

Can someone please explain this concept to me in a way that makes sense? :-S



Thank you!

TCav Nov 2, 2007 2:27 PM

See http://en.wikipedia.org/wiki/Circle_of_confusion

The circle of confusion is a fancy term for when an object is out of focus. When the light reflected by an object is out of focus it forms a circle instead of the point it would form if itwere in focus.

The circle of confusionproducesbokeh.

See also http://www*****eamyguy.net/iris/index.htm

BillDrew Nov 2, 2007 9:07 PM

daddyorchips84 wrote:
Quote:

Can someone please explain this concept to me in a way that makes sense? :-S



Thank you!
The Circle of Confusion (CoF) comes into play when talking about depth of field.

Strictly speaking, objects at only one precise distance are in focus in a photograph. The real question is much the same as in many other siturations where it is not possible to get things exactly right - What is good enough? The circle of confussion is a measure of "good enough"

If you choose a large CoF (sloppy idea of "good enough") you will have a large depth of field. If you want a small CoF (very tight idea of "good enough"), you will have a smaller depth of field.

Google Circle of Confusion for more precise explainations. Be prepared to spend a bit of time with the math of optics.


All times are GMT -5. The time now is 4:36 PM.