Canon News has uncovered another diffractive optic patent for supertelephoto optical formulas has shown up at the USPTO. This patent covers the following: EF 200mm f/2 EF 400mm f/2.8 EF 800mm f/5.6 Canon continues to work away at more and more diffractive optics development, but we’re still waiting to see new products come to market. Read more......
Published By: Canonrumors - Thursday, 3 May, 2018