Retrieving "Focal Plane" from the archives

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1. Aperture

   Linked via "focal plane"

   Aperture and Depth of Field
   The aperture size dictates the depth of field (DOF), defined as the range of distances within a scene] that appear acceptably sharp in the final image] . Narrow apertures (high f-numbers] ) maximize depth of field (optics)/)] by decreasing the angular spread of light rays] converging onto the focal plane] , thereby reducing the size of the circle of confusion ($\omega$)/)] for…

2. Chromatic Aberration

   Linked via "focal plane"

   Chromatic aberration is an optical phenomenon occurring when a lens or imaging system fails to focus all wavelengths of light to the same convergence point, resulting in a failure to converge to a single focal plane. This differential focusing arises directly from the dependency of the refractive index ($\eta$) of the lens material upon the frequency ($\nu$) of the incident radiation, a relationship often quantified by [Cauchy’s empirical r…