Nothing changes the way you see the world like High Definition II and no company does High Definition II 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.Since it fits right over your camera's existing lens system, a telephoto converter affects the zoom range of your camera's lens. A 2.2x telephoto converter virtually DOUBLES your camera's maximum focal length, bringing things twice as close. Ideal for all types of photographic situations.An Opteka conversion lens can actually improve the image that your digital camera receives. By eliminating flare and ghosting, the ugly cousins of reflection and refraction, before they get to your camera's original lens system, your camera gets a much cleaner image to digitize. Plus, an Opteka converter allows you to use a more optimal part of your original lens system, resulting in crisper imagery.