Lens chief ray angle defines how light enters the sensor surface, influencing image clarity and brightness. Matching the CRA of a lens to the sensor’s acceptance angle avoids uneven illumination, color shifts, and corner softness, ensuring consistent optical performance.

Lens chief ray angle defines how light enters the sensor surface, influencing image clarity and brightness. Matching the CRA of a lens to the sensor’s acceptance angle avoids uneven illumination, color shifts, and corner softness, ensuring consistent optical performance.