Abbreviation: M/A = "M/A Mode" (Nikon)
The abbreviation M/A means "M/A Mode" and is seen on Nikon products.
Explanation from Nikon
AF-S NIKKOR lenses feature Nikonīs exclusive M/A mode, that allows switching from autofocus to manual operation with virtually no time lag even during AF servo operation and regardless of AF mode in use.
