Canon DO optics are used in lenses to make it more light-weight and compact. Based on latest trend Canon also wants to keep its system light-weight and compact.
Description, self-interpretation of the patent literature
- Patent Publication No. 2016-102851
- Published 2016.6.2
- Filing date 2014.11.27
- Example
- Zoom ratio 1.00
- Focal length 31.35
- F-number 2.86
- Angle of view 34.61
- Image height 21.64
- Overall length of the lens 85.29
- BF 29.99
- Canon patent
- Positive ShiboTadashi
- Diffractive optical element (the second group of aperture stop image side)
- Correct axial chromatic aberration and lateral chromatic aberration of the near-infrared light
- [0001]The present invention relates to a magnification chromatic aberration correction of the imaging optical system used in a near infrared region from the visible region is suitable especially monitoring optical system.
Also see – First Canon 5D Mark IV Image Leaked ?
