Figure 1. Shown here is the same degree of pincushion (a positive geometric distortion) for a 4:3 aspect ratio image and a 16:9 aspect ratio image. The percentage of distortion is visibly greater in ...

Apochromatic (APO): A lens group designed to correct chromatic aberrations for three wavelengths (usually red, green, and blue) rather than just one or two. Aspheric: A lens element with a ...

Physicists in the US have made the first ultrathin flat lens. Thanks to its flatness, the device eliminates optical aberrations that occur in conventional lenses with spherical surfaces. As a result, ...

When a manufacturer tells you they make a spherical-aberration-free finite-conjugate double-aspheric lens, what do you say to them? That'll be the problem I'll have should I ever meet up with ...

One of the lesser-known ways that camera manufacturers have been able to make digital cameras ever smaller and less expensive is by using in-camera software to correct for lens distortion on the fly.