Lens distortion: everything every photographer must know

Lens distortion: everything every photographer must know

Learning the lingo

 

Barrel distortion
Lens fault common on ultra-wide lenses that bows straight lines outwards at the edges.

Chromatic aberration
Lens fault in which wavelengths of light are refracted by different amounts, or brought to focus at different distances.

Pincushion distortion
Lens fault common on long telephoto lenses that causes the image to appear to bow inwards at the edges.

APO
Apochromat. A type of lens, made by Sigma and others, that’s designed to correct chromatic aberration.

ED
Extra-low dispersion. A range of Nikon lenses designed to correct chromatic aberration.

UD
Ultra-low Dispersion. Element found in some Canon L-Series lenses that’s designed to correct chromatic aberration.

PAGE 1: Common questions about lens distortion
PAGE 2: Types of lens distortion
PAGE 3: Why does chromatic aberration occur?
PAGE 4: Learning the lingo

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