Canon EOS - Diffractive Optical DO lenses скачать в хорошем качестве

Canon EOS - Diffractive Optical DO lenses

Please also look at the playlists:    / christopherkblog   Light refracts when it passes through a lens. And when encountering an obstacle, light bends around behind the other side of the obstacle. This phenomenon is known as diffraction. Using elements called "Diffractive Optics," DO lenses are designed to correct chromatic aberration by means of both refraction and diffraction of light. Chromatic aberration in common refraction lenses occurs in a completely opposite manner to that of DO lenses. With the former, images form in the order of Blue → Green → Red, whereas with DO lenses, images form in the reverse order: Red → Green → Blue. By combining these two completely different lenses, we were able to negate the two contradictory chromatic aberrations. As a result, we are now able to create telephoto and other lenses that are significantly smaller and lighter.