Pentax K-5 IIs Operating Guide

193

6

Sh

oo

ting

 Se
tting

s

Reduces distortions and lateral chromatic aberrations occurring due to 

lens properties.

 

Distortion

Distortion is the phenomenon in which the center of the image appears 

inflated (barrel distortion) or the center of the image appears pinched 

(pincushion distortion). Distortion occurs more easily when using 

a zoom lens or a small diameter lens, and straight walls or the horizon 

in the image appear curved.

 

Lateral chromatic aberration

Lateral chromatic aberration is the phenomenon in which the 

magnification of the image varies according to the colors (wavelengths 

of light) when a picture was taken, and may cause a blurred image. 

Lateral chromatic aberration occurs more easily at shorter focal lengths.

Lens Correction

Pincushion distortion

Barrel distortion

K-5 II_ENG.book  Page 193  Wednesday, October 10, 2012  1:20 PM