Sony VCL-ECU1 0.75X Ultra Wide Converter for SEL16F28 16mm f/2.8 or 20mm f/2.8
Mounting: Bayonet mount designed specifically for the Sony E 16mm f/2.8 (SEL16F28) lens. This converter is a cost-effective solution for achieving ultra-wide-angle photography on compatible Sony NEX and Alpha systems.