Purchased about 4 years ago, used 1-2 times a year. Price is firm. *Instant purchase is welcome. SONY 2x Teleconverter SEL20TC, E-mount, full-frame compatible. - Brand: SONY - Model Name: SEL20TC - Type: Teleconverter - Magnification: 2X - Mount Type: E-mount - Compatible Format: Full-frame ● High-performance teleconverter that doubles the focal length of the lens. ● Achieves high descriptive performance and fast AF performance even when the teleconverter is attached. ● Designed with dust and moisture resistance, similar to the lens body. ■ Compatible Lenses FE 70-200mm F2.8 GM OSS (SEL70200GM), FE 70-200mm F2.8 GM OSS II (SEL70200GM2), FE 70-200mm F4 Macro G OSS II (SEL70200G2), FE 100-400mm F4.5-5.6 GM OSS (SEL100400GM), FE 200-600mm F5.6-6.3 G OSS (SEL200600G), FE 300mm F2.8 GM OSS (SEL300F28GM), FE 400mm F2.8 GM OSS (SEL400F28GM), FE 400-800mm F6.3-8 G OSS (SEL400800G), FE 600mm F4 GM OSS (SEL600F40GM)