Correlation Between Focal Length, Angle, And Perspective - Samsung NX1000 User Manual

Correlation between focal length, angle,
Long focal ler
and perspective
Focal length, which is measured in millimeters, is the distance between
the middie of the lens to its focal point, it affects the angle and
perspective of captured images. A short focal length translates into a
wide angle, which allows you to capture a wide shot. A long focal length
translates into a narrow angle, which allows you to capture telephoto
shots.
telephoto shot
Short focal length
narrow angle
Look at these photos below and compare the changes.
wide-angle lens
wide shot
wide angle
20 mm angle 50 mm angle 200 mm angle