Latest patent surfaced over the web suggest that Canon is upgrading its Canon EF 180mm f/3.5L Macro lens with Hybrid Image Stabilization, not only that Two new Macro Lenses with Hybrid Image stabilization also seen in the patent page.
List of Canon Lenses to arrive with Hybrid IS
180mm f/3.5 Macro IS
200mm f/3.5 Macro IS
300mm f/3.5 Macro IS
Description and self-interpretation of the patent literature
- Patent Publication No. 2014-41224
- Publication date 2014.3.6
- Filing date 2012.8.22
- Example 1
- Zoom ratio 1.37
- Focal length f = 180.03-167.06-131.08mm
- Fno (3.6-4.8-5.8 actual aperture). 3.6-3.3-2.59
- Half angle ω = 6.85-7.38-9.37 °
- Image height 21.64mm
- The overall length of the lens 228.39mm
- BF 68.14mm
- Example 2
- Zoom ratio 1.58
- Focal length f = 198.49-164.7-125.48mm
- Fno (3.6-4.8-5.8 actual aperture). 3.6-2.99-2.28
- Half angle ω = 6.22-7.48-9.78 °
- Image height 21.64mm
- The overall length of the lens 231.65mm
- BF 71.4mm
- Example 3
- Zoom ratio 1.92
- Focal length f = 289.97-213.39-151.33mm
- Fno (3.6-4.8-5.8 actual aperture). 3.6-2.65-2.21
- Half angle ω = 4.27-5.79-8.14 °
- Image height 21.64mm
- The overall length of the lens 294.36mm
- BF 68.05mm
- Canon patents
- Inner focus
- (Part of the fourth lens group) antivibration
- Supports Shifutobure
- Floating
src- egmai
