good lens. There is no documentation for the lens. Maybe gray market as it was "packaged in bulk". However, it works perfectly. A good replacement for the kit lens that came with my Sony A6000 which failed (camera 'doesn't recognize' the lens when installed) as it is not covered under warranty. (My other lenses worked fine). Sony offered me $156 for an INSPECTION once I send it to an authorized repair shop! Paid about the same for this new one and got it in just a few days! Many Thanks.