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By admin, on May 24th, 2014
Canon Patent two new DO Lenses – 70-300mm, 100-400 mm F4.5-5.6 DO Lens, image and details below
Description and self-interpretation of the patent literature
- Patent Publication No. 2014-89385
- Publication date 2014.5.15
- Filing date 2012.10.31
- Example 1
- Zoom ratio 3.78
- Focal length f = 103.00-200.00-388.94mm
- Fno. 4.63-5.24-5.83
- Half angle ω = 11.86-6.17-3.18 °
- Image height Y = 21.64mm
- 228.82-273.58-303.10mm total length
- BF 69.48-90.93-105.73mm
- Example 6
- Zoom ratio 4.00
- Focal length f = 72.50-135.00-289.99mm
- Fno. 4.44-5.04-5.85
- Half angle ω = 16.62-9.10-4.27 °
- Image height Y = 21.64mm
- 143.91-177.69-203.15mm total length
- BF 39.10-39.10-39.10mm
Canon diffractive optical (DO) Lenses are smaller and lighter compared to the lenses of same focal length, for example EF 70–300mm f/4.5–5.6 DO IS USM lens is 28 percent shorter than the EF 70–300mm f/4–5.6 IS USM lens. But the price DO lenses are generally high compared to the normal lenses of same focal length.
By admin, on April 17th, 2014
A new patent surfaced over the web that shows Canon 24-70mm F2.8 lens with built in Image Stabilization, the a patent literature generally take 1 to 2 year to become a real product.
Patent details translated by google
Description and self-interpretation of the patent literature
- Patent Publication No. 2014-52413,2014-52445
- Publication date 2014.3.20
- Filing date 2012.9.5
- Example 1
- Zoom ratio 2.75
- Focal length f = 24.7-35.21-68mm
- Fno. 2.9
- Half angle ω = 41.21-31.57-17.65 °
- Image height 21.64mm
- 223.94-207.87-180.56mm overall length of the lens
- BF 38.31mm
src- egami.blog.so-net.ne.jp
By admin, on March 12th, 2014
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
By admin, on January 26th, 2014
Canon Patent 11-24mm Lens, the canon 11-24mm range was empty, we hope this lens will fill out the users need.
Patent details / Translated below
- Patent Publication No. 2014-10286
- Publication date 2014.1.20
- Filing date 2012.6.29
- Example 1
- Zoom ratio 2.06
- Focal length f = 11.30-18.00-23.30mm
- Fno. 4.10
- Half angle ω = 62.42-50.24-42.88mm
- Image height Y = 21.64mm
- 172.19-161.28-162.86mm overall length of the lens
- BF 38.82-52.31-63.15mm
See more Canon Patents here
src-egmai
By admin, on January 23rd, 2014
Latest Canon patent surfaced over the web that shows 85mm lens with built-in optical image stabilization, canon is also rumored to announce 50mm F1.8 lens very soon.
Description and self-interpretation of the patent literature
- Patent Publication No. 2014-10283
- Publication date 2014.1.20
- Filing date 2012.6.29
- Example 1
- Focal length f = 85.56mm
- Fno. 1.86
- Angle of view 2ω = 28.4 °
- Image height Y = 21.635mm
- Example 2
- Focal length f = 102.06mm
- Fno. 2.00
- Angle of view 2ω = 23.9 °
- Image height Y = 21.635mm
- Example 3
- Focal length f = 131.00mm
- Fno. 2.80
- Angle of view 2ω = 18.8 °
- Image height Y = 21.635mm
- Canon patents
- Positive and negative positive
- Inner Focus (group 2)
- (Part of the third group) antivibration
By admin, on January 20th, 2014
 Canon EF-M Lens 18-40 lens patent surfaced over the web, usually it take two to three years when a lens / camera patent becomes reality aka consumer product.
- Patent Publication No. 2014-6275
- Publication date 2014.1.16
- Filing date 2012.6.21
- Example 7
- Zoom ratio 3.00
- Focal length f = 18.10-37.01-54.30mm
- Fno. 4.20-6.20-8.20
- Half angle ω = 36.92-20.17-14.06 °
- Image height Y = 13.60mm
- 64.74-56.63-62.13mm lens length
- BF 0.50mm
src-egmai
By admin, on January 13th, 2014
 A new patent surfaced over the web that shows Canon is putting focus on increasing the reliability AF system, patent details translated below
Description and self-interpretation of the patent literature
- Patent Publication No. 2013-254194
- Publication date 2013.12.19
- Filing date 2012.5.11
- Issues surrounding the AF adjustment
- The looseness of the phase difference AF sensor, because the AF accuracy is worse, need AF adjustment
- It is not done correctly the AF adjustment in your environment
- Necessary facilities such as service center
- Canon patents
- Automation of the AF adjustment
- Procedure
- Let me be the difference adjusted value of the phase difference AF and contrast AF
- To determine the reliability
See more Canon Patents here
src – http://bit.ly/1lSAEyQ
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