Attach the 'fisheye' conversion lens to the SEL16F28 or SEL20F28 lens of your E-mount camera for a 180 degree curvilinear view with high definition optics. This fisheye converter lens, model VCL-ECF2, allows for a wide, curvilinear perspective. It is designed to attach to the Sony 16mm f2.8 or Sony 20mm f2.8 lens of your E-mount camera. When mounted on the E16mm f/2.8 lens, the focal length becomes 10mm, and when mounted on the E20mm f/2.8 lens, the focal length becomes 13mm. The lens features an easy-to-attach bayonet mechanism with a lock for quick fitting. The maximum aperture of F2.8 remains unchanged, meaning no light loss is incurred. The converter boasts a sleek, high-quality design and is available in black.