The model HD-7062PRO high definition Wideangle conversion lens is made of the high index optical glass elements with new concept of lens designing using a three-group/three-element lens formula. This new concept in designing the lens made it possible to achieve an amazing high definition wideangle lens of 540 lines/mm resolution power at center (MTF30%).It's compatible with whole zoom area and stays in focus**.**The lens is made compatible in using with a 20x zoom lens. However, when zoomed up to the end of the telephoto with the lens on, the image quality of the picture will be lowered except the center area, and the deterioration of resolution power at corners will occur.This model is made for 62mm direct mounting size.- Magnification: Nominal 0.7x- Actual 0.7x/Diagonal, 0.7x/Horizontal- Lens construction: 3G/3E Optical coated glass elements- Minimum focusing distance: 1cm- Effective zooming with conversion lens on: 1x - 20x zoom**- Front filter size: 82mm- Mounting threads: 62mm- Size/Weight: 43 x 86mm/313g(11oz)