Patent: 500mm and 600mm diffractive optic lenses
Here is another in a long line of diffractive optics patents we’ve seen from Canon over the last couple of years. Since the Canon EXPO Read more... canonrumors.com »
Patent 500mm | |
Here is another in a long line of diffractive optics patents we’ve seen from Canon over the last couple of years. Since the Canon EXPO Read more... canonrumors.com »
It looks like Tamron may be entering the world of fast supertelephoto lenses. Three different optical formulas have appeared in the same patent application from Tamron. Embodiment 1: 300mm F/2.8 Focal length: 304.799 mm F No.: 2.8 Read more... canonrumors.com »