Sigma 1.4X EX AF APO Teleconverter (Nikon) with Caps and Lens Case<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> High performance 5 element/3 group optical design </span></li><li><span class="a-list-item"> Optimized for use with long telephoto and telezoom lenses </span></li><li><span class="a-list-item"> Maintains the optical performance of the compatible lenses with which it can be used </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/01XZFP5QDRL.jpg" noproxy>