Nothing changes the way you see the world like High Definition² and no company does High Definition² like Opteka. Opteka"s glass optics defines High Definition. Change the way you view the world. Enjoy outstanding detail, enjoy enhanced clarity and enjoy Opteka. The new Opteka High Definition² 0.35x Ultra Wide Angle Fisheye Converter Lens increases the versatility of your existing lens to provide breathtaking ultra wide angle views. And it"s so easy to use! Additionally the built-in detachable macro lens allows you to take extreme high resolution close-up shots! Opteka lenses put more creative control where it belongs - in your hands.