|
When you purchase through links on our site, we may earn an affiliate commission. Here's how it works. |
More Canon lens patents have shown up. This time we get some macro patents that also include hybrid IS. We've been told that the 180mm f/3.5L macro is on its way out, and this could be the direction Canon takes it.
A few other focal lengths also appear in the patent as well such as 200mm & 300mm versions with hybrid IS.
The information below is a Google translation.
- 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
Source: [EG]
cr
