(from the article `aberration`) ...the optical axis is made to intersect a cone, the rays will form a circular cross section. The area of the cross section varies with distance ...
Found on
http://www.britannica.com/eb/a-z/c/87
Any sufficiently small circle is indistinguishable to the human eye from a point. As long as a lens resolves a point as a circle that is small enough, its resolution is adequate: though a lot depends on how much the image is to be enlarged, and the lighting conditions under which it is to be displayed, to say nothing of variations in in...
Found on
http://www.encyclo.co.uk/local/21048
Any sufficiently small circle is indistinguishable to the human eye from a point. As long as a lens resolves a point as a circle that is small enough, its resolution is adequate: though a lot depends on how much the image is to be enlarged, and the lighting conditions under which it is to be displayed, to say nothing of variations in individual eye...
Found on
http://www.rodsmith.org.uk/photographic%20glossary/rods%20photographic%20gl
Disc of light in the image where a point on the subject is not perfectly brought into focus. The eye cannot distinguish between a very small circle of confusion and a true point.
Found on
https://www.encyclo.co.uk/local/20176
a circular spot on a film, resulting from the degree to which a pencil of light reflected from the field of view is focused in front of or behind the film, or from aberration of the lens, or from both.
Found on
https://www.infoplease.com/dictionary/circle-of-confusion
No exact match found.
