Features: _x000D_ The ring is made of good quality material, anti-rust, sturdy and durable. _x000D_ Precision machining, ensures perfect fit for your cameras, easy to install._x000D_ _x000D_ Supports manual focus and AV mode, it also gives you infinite focusing. _x000D_ _x000D_ The lens adapter would give warning tone when it's focusing to remind you of the focusing is finished. _x000D_ Make it possible for Pentax K mount lens become compatible for Canon EOS EF mount cameras. _x000D_ _x000D_ _x000D_ Specification: _x000D_ Material: Alloy _x000D_ Color: Shown as picture _x000D_ Suitable for Canon EOS (EF mount) cameras _x000D_ Applicable for Pentax K mount lens _x000D_ Diameter: Approx. 6.4cm / 2.5inch _x000D_ Weight: Approx. 34g _x000D_ _x000D_ _x000D_ Package List: _x000D_ 1 x Lens Adapter Ring _x000D_ _x000D_ _x000D_ Notice: _x000D_ _x000D_ The lens adapter is compatible for Canon 5D Mark IV and 6D Mark II, but it doesn't have warning tone. 1The ring is made of good quality material, anti-rust, sturdy and durable 2Precision machining, ensures perfect fit for your cameras, easy to install 3Supports manual focus and AV mode, it also gives you infinite focusing 4The lens adapter would give warning tone when it's focusing to remind you of the focusing is finished 5Make it possible for Pentax K mount lens become compatible for Canon EOS EF mount cameras