What metering systems are available for which lenses?
With AF, P, AI-S, and AI lenses, all metering systems — Matrix, Center-Weighted, and Spot — all work. Metering available with modified AI lenses includes Spot and Center-Weighted but not Matrix. Metering with non-AI lenses include both Spot and Center-Weighted, but metering has to take place with the lens stopped down to the shooting aperture.