- 2069 Bhadra · 1 mark
Define principal point
Short answer
Point where the optical axis meets the photograph, at the foot of the perpendicular from the lens. It is the intersection of lines joining opposite fiducial marks.
Define principal point.
The principal point of a photograph is the foot of the perpendicular from the lens (perspective centre) to the photo plane, i.e. the point where the optical axis of the camera meets the photograph. It is located at the intersection of the lines joining opposite fiducial marks.
✓ Answer checked by Claude Opus 5.5 (high effort)
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