21Concepts 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 and perspectiveof captured images. A short focal length translates into a wide angle,which allows you to capture a wide shot. A long focal length translatesinto a narrow angle, which allows you to capture telephoto shots.Short focal lengthwide shotwide anglewide-angle lensLong focal lengthtelephoto shotnarrow angletelephoto lensLook at these photos below and compare the changes.18 mm angle 55 mm angle 200 mm angleNormally, a lens with a wide angle is suitable for shooting landscapes and a lenswith a narrow angle is recommended for shooting sports events or portraits.
