19Concepts in PhotographyCorrelation between focal length, angle,and perspectiveFocal length, which is measured in millimeters, is the distance betweenthe middle of the lens to its focal point. It affects the angle andperspective of captured images. A short focal length translates into awide angle, which allows you to capture a wide shot. A long focal lengthtranslates into a narrow angle, which allows you to capture telephotoshots.Short focal lengthwide shotwide anglewide-angle lensLong focal lengthtelephoto shotnarrow angletelephoto lensLook at these photos below and compare the changes.20 mm angle 50 mm angle 200 mm angleNormally, a lens with a wide angle is suitable for shooting landscapes anda lens with a narrow angle is recommended for shooting sports events orportraits.
