Focal length & perspective
One portrait, seven focal lengths, framing held constant — perspective changes because the camera moved back, not because the lens distorts.
Only mild widening remains — the first stop most people read as "normal". The do-everything length, but step closer and the nose creeps back up.
The shot, from above
The framing is locked head-and-shoulders on every frame. Only the camera distance changes — so the wide lens exaggerates the nose and the long lens flattens the face. That is perspective, and it is a function of where the camera stood, not of the glass. Read the full guide: why distance draws the face, not the lens →