?This item can allow the C/Y series lens to be used perfectly on camera from Sony£¬ increasing aperture to get nearly full-frame effect. <br><br><strong>Features:</strong> <br>This item can allow the C/Y series lens to be used perfectly on camera from Sony. <br>Manual focus. <br>Special optical configuration£¬ 4 elements 4 groups. <br>With 1/4 Screw hole£¬ can be attached to tripod mount. <br>Comes with covers and a plastic case for protection and ease of transport. <br><br><strong>Specifications:</strong> <br>Compatible lens: C/Y series lens <br>Compatible cameras: for Sony E-mount series <br>Optical configuration: 4 elements 4 groups <br>Max. diameter and length: 71 * 83mm / 2.8 * 3.3in <br>Package size: 10.5 * 9.5 * 6cm / 4.1 * 3.7 * 2.4in <br>Package weight: 319g / 11.26oz <br><br><strong>Package List:</strong> <br>1 * Adapter? <br>1 * Screwdriver <br>2 * Covers <br>1 * Box